Name

HAYASHI, Yasuhiro

Official Title

Professor

Affiliation

(School of Advanced Science and Engineering)

Contact Information

Address・Phone Number・Fax Number

Address
3-4-1 Okubo,Shinjyu-ku,Tokyo 169-8555 JAPAN
Phone Number
+81-3-5286-8122
Fax Number
+81-3-5286-8035

URL

Web Page URL

http://www.eb.waseda.ac.jp/hayashi/

Grant-in-aids for Scientific Researcher Number
40257209

Sub-affiliation

Sub-affiliation

Faculty of Science and Engineering(Graduate School of Advanced Science and Engineering)

Affiliated Institutes

先進グリッド技術研究所

プロジェクト研究所所長 2009-2014

先進グリッド技術研究所

研究所員 2009-2014

次世代蓄電エネルギー連携研究所

研究所員 2011-2014

先進グリッド技術研究所

研究所員 2014-2016

マーケティング国際研究所

研究所員 2019-

住宅・建築環境設備研究所

研究所員 2014-2019

太陽光発電システム研究所

研究所員 2014-2019

動力エネルギーシステム研究所

研究所員 2014-2019

スマートライフサイエンス研究所

研究所員 2014-2019

電動車両研究所(EdVs研究所)

研究所員 2014-2019

次世代蓄電エネルギー連携研究所

研究所員 2015-

先進グリッド技術研究所

研究所員 2016-2019

次世代交通システム研究所

研究所員 2017-

理工学術院総合研究所(理工学研究所)

兼任研究員 2018-

鉄道システム技術研究所

研究所員 2019-

Educational background・Degree

Educational background

-1989 Waseda University Faculty of Science and Engineering
-1991 Waseda University Graduate School, Division of Science and Engineering
-1994 Waseda University Graduate School, Division of Science and Engineering

Career

1993-1994Waseda University, faculty of science and engineering, research associate
1994-1997Ibaraki Unversity, faculty of engineering, research associate
1997-2000Ibaraki Unversity, faculty of engineering, lecturer,
2000-2009University of Fukui, faculty of engineering, associate professor
2009-Waseda University, graduate school of advanced science and engineering, Professor
2009/12-Research Insititute of Advanced Network Technology,Director
2014/07-Advanced Collaborative Research Organization for Smart Society (ACROSS)Dean

Academic Society Joined

Institute of Electrical and Electronic Engineers

The Institute of Electrical Engineers of Japan

OfficerCareer(Outside the campus)

2016/04-Electricity and Gas Market Surveillance CommissionCommissioner
2014/01-CIGREStudy Committee C6 (distribution systems and dispersed generation) member

Award

The Commendation for Science and Technology by the Minister of Education, Culture, Sports, Science and Technology (Research Category)

2019/04Conferment Institution:The Ministry of Education, Culture, Sports, Science and Technology(MEXT)

Distinguished Paper Award from the IEE of Japan in 2008

2008/05

Interview Guide

Category
Engineering
Research Field
smart grid, energy management system, demand response
Self-introduction Comment
Research focuses on development of smart grid technology, optimization of energy management system (EMS), demand response (DR) technology, prediction, operation, and control of electrical energy.

Research Field

Keywords

Optimization of advanced electrical energy system, Cooperative operation and control of distributed generation and power system

Grants-in-Aid for Scientific Research classification

Engineering / Electrical and electronic engineering / Power engineering/Power conversion/Electric machinery

Cooperative Research Theme Desire

advanced control of renewable energy sources

Institution:Cooperative research with other research organization including private (industrial) sectors

Purpose:Sponsord research、Collaboration research

advanced transmission and distribution network control

Institution:Cooperative research with other research organization including private (industrial) sectors

Purpose:Sponsord research、Collaboration research

smart control of demand side

Institution:Cooperative research with other research organization including private (industrial) sectors

Purpose:Sponsord research、Collaboration research

Research interests Career

advanced control of renewable energy sources

Current Research Theme Keywords:smart grid,Photovoltaics, wind-power generation, distribution system, advanced voltage control,storage battery

Individual research allowance

advanced transmission and distribution network control

Current Research Theme Keywords:smart grid,advanced frequency control,storage battery,Photovoltaics, wind-power generation, distribution system, advanced voltage control

Individual research allowance

smart control of demand side

Current Research Theme Keywords:smart grid,Photovoltaics, wind-power generation,advanced voltage control,smart meter,Heat pump water heater,storage battery,Fuel cell,electric vehicle

Individual research allowance

Paper

Multipurpose control and planning method for battery energy storage systems in distribution network with photovoltaic plant

Satoru Asagi, Shinya Yoshizawa, Masakazu Ito, Yu Fujimoto, Teru Miyazaki,Yasuhiro Hayashi, Katsuhisa Tawa, Toshiya Hisada, Takashi Yano

International Journal of Electrical Power and Energy Systems p.1 - 132020/03-2020/03

LDC-Control Parameters by Plane Determination Using Database Offline in Distribution Networks with PV System

Akihisa Kaneko, Yasuhiro Hayashi, Masakazu Ito, Takaya Anegawa, Hideyasu Hokazono, Masayuki Oyama

International Journal of Electrical and Electronic Engineering & Telecommunications(IJEETC) 9(2) 2020/03-2020/03

Multipurpose control and planning method for battery energy storage systems in distribution network with photovoltaic plant

Satoru Akagia, Shinya Yoshizawa, Masakazu Ito, Yu Fujimoto, Teru Miyazaki,Yasuhiro Hayashi, Katsuhisa Tawa, Toshiya Hisada, Takashi Yano

International Journal of Electrical Power and Energy Systems 2020/03-2020/03

Home Energy Management Systems under Effects of Solar-Battery Smart Inverter Functions

Van Tu Dao, Hideo Ishii, Yuji Takenobu, Shinya Yoshizawa, Yasuhiro Hayashi

IEEJ Transactions on Electrical and Electronic Engineering 2020/02-2020/02

Intensive quadratic programming approach for home energy management systems with power utility requirements

V.T.Dao,H.Ishii⁎,Y.Takenobu,S.Yoshizawa,Y.Hayashi

International Journal of Electrical Power and Energy Systems 2020/01-2020/01

Scheduling method of wind power generation for electricity market using state-of-charge transition and forecast error

Aki Kikuchi, Masakazu Ito, Yasuhiro Hayashi

Journal of International Council on Electrical Engineering 9(1) p.123 - 1322020/01-2020/01

Multi-Objective Optimal Operation Planning for Battery Energy Storage in a Grid-Connected Micro-Grid

Anto Ryu, Hideo Ishii, and Yasuhiro Hayashi

International Journal of Electrical and Electronic Engineering & Telecommunications, 2020-2020

link

Analysis of operation plans of residential PEFC–CGS: a perspective of cost optimality under demand uncertainty

Yuta Tsuchiya, Yu Fujimoto, Akira Yoshida, Yoshiharu Amano, Yasuhiro Hayashi

Journal of International Council on Electrical Engineering (JICEE), 9(1) p.105 - 1122019/12-2019/12

Willingness to Pay for Home Energy Management Systems A Survey in New York and Tokyo

Ayu Washizu, Satoshi Nakano, Hideo Ishii, Yasuhiro Hayashi

Sustainability (Switzerland) 11p.47902019/09-2019/09

Renovating a house to aim for net-zero energy, thermal comfort, energy self-consumption and behavioral adaptation A method proposed for ENEMANE HOUSE 2017

Reina Oki, Yugo Tsuneoka, Shingo Yamaguchi, Soma Sugano, Naoya Watanabe, Takashi Akimoto, Yasuhiro Hayashi, Shinji Wakao, Shin-ichi Tanabe ,

『Energy and Buildings』pubulished by ELSEVIER, 201p.183 - 1932019/09-2019/09

Willingness to Pay for Home Energy Management Systems A Survey in New York and Tokyo

Ayu Washizu, Satoshi Nakano, Hideo Ishii, Yasuhiro Hayashi

Sustainability (Switzerland)11,Published - 2019 9 1 112019/09-2019/09

Spinning reserve quantification considering confidence levels of forecast in systems with high wind and solar power penetration

Thi Nguyet Hanh Nguyen, Kuniaki Yabe, Masakazu Ito, Van Tu Dao, Hideo Ishii, Yasuhiro Hayashi

IEEJ Transactions on Electrical and Electronic Engineering ,Volume 14, Issue 9, 2019, 14(9) 2019/09-2019/09

Enhancing Security for Voltage Control of Distribution Systems under Data Falsification Attacks

Mizuki Onogawa, Shinya Yoshizawa, Yu Fujimoto, Hideaki Ishii, Isao Ono, Takashi Onoda, Yasuhiro Hayashi

American Control Conference (ACC) 2019/08-2019/08

Electric Vehicle Charging Management Using Auction Mechanism for Reducing PV Curtailment in Distribution Systems

Hiroshi Kikusato, Yu Fujimoto, Shin-ichi Hanada, Daiya Isogawa,Shinya Yoshizawa, Hiroshi Ohashi, Yasuhiro Hayashi,

IEEE Transactions on Sustainable Energy ( Early Access ), 1(1) 2019/07-2019/07

Electric Vehicle Charging Management Using Auction Mechanism for Reducing PV Curtailment in Distribution Systems

Hiroshi Kikusato, Yu Fujimoto, Shin-ichi Hanada, Daiya Isogawa,Shinya Yoshizawa, Hiroshi Ohashi, Yasuhiro Hayashi,

IEEE Transactions on Sustainable Energy ( Early Access ), 2019/07-2019/07

Toward Data-Driven Identification of Essential Factors Causing Seasonal Change in Daily Electricity Demand Curves

Nanae Kaneko,Yu Fujimoto, Yasuhiro Hayashi

2019 IEEE Milan PowerTech,18938863 2019/06-2019/06

Machine Learning Approach for Graphical Model-Based Analysis of Energy-Aware Growth Control in Plant Factories

Yu Fujimoto, Saya Murakami, Nanae Kaneko, Hideki Fuchikami, Toshirou Hattori, Yasuhiro Hayashi

IEEE Access Vol,7、Article number 8663284 72019/03-2019/03

Intensive quadratic programming approach for home energy management systems with power utility requirements

Van Tu Dao, Hideo Ishii, Yuji Takenobu, Shinya Yoshizawa, Yasuhiro Hayashi

International Journal of Electrical Power & Energy Systems, Vol.115 1152019/02-2019/02

Energy Disaggregation Based on Smart Metering Data via Semi-Binary Nonnegative Matrix Factorization

Ayumu Miyasawa, Yu Fujimoto, Yasuhiro Hayashi

Energy and Buildings, Vol.183 1832019/01-2019/01

Alerting to Rare Large-Scale Ramp Events in Wind Power Generation

Yu Fujimoto, Yuka Takahashi, Yasuhiro Hayashi

IEEE Transactions on Sustainable Energy , Volume 10, Issue 1 10(1) 2019/01-2019/01

Double-layer optimization of home energy management systems with volt–watt functions

Van Tu Dao, Hideo Ishii, Yasuhiro Hayashi

IEEJ Transactions on Electrical and Electronic Engineering 2019/01-2019/01

Bid Determination Method for an Electricity Market with State-of-Charge Maintenance of a Compressed Air Energy Storage System Using the Prediction Interval of Wind Power Output

Aki Kikuchi, Masakazu Ito, Yasuhiro Hayashi

Atlantis Highlights in Engineering, Vol. 4 4p.176 - 1822019-2019

Spinning Reserve Quantification considering confidence levels of Forecast in systems with High Wind and Solar Power Penetration

Thi Nguyet Hanh, Nguyen (non-member), Kuniaki Yabe (senior member), Masakazu Ito (member), Van Tu Dao (nonmember), Hideo Ishii (member), and Yasuhiro Hayashi (senior member)

IEEJ Transactions of Electrical and Electronic Engineering 14p.1304 - 13132019-2019

Scalable enumeration approach for maximizing hosting capacity of distributed generation

Yuji Takenobu, Norihito Yasudab, Shin-ichi Minatoc, Yasuhiro Hayashi

Electrical Power and Energy Systems 105p.867 - 8762019-2019

Optimal Parameters of Volt-Var Functions for Photovoltaic Smart Inverters in Distribution Networks

Van Tu Dao, Hideo Ishii, Yasuhiro Hayashi

IEEJ Transactions on Electrical and Electronic Engineering 14(1) p.75 - 842019-2019

Alerting to Rare Large-Scale Ramp Events in Wind Power Generation

Yu Fujimoto, Yuka Takahashi, Yasuhiro Hayashi

IEEE Transactions on Sustainable Energy 10(1) p.55 - 652019-2019

Energy disaggregation based on smart metering data via semi-binary nonnegative matrix factorization

Ayumu Miyasawa, Yu Fujimoto, Yasuhiro Hayashi

Energy and Buildings 183(15) p.547 - 5582019-2019

Double-layer optimization of home energy management systems with volt–watt functions

Van Tu Dao, Hideo Ishii, Yasuhiro Hayashi

IEEJ Transactions on Electrical and Electronic Engineering 14(5) p.1 - 112019-2019

Intensive Quadratic Programming Approach for Home Energy Management Systems with Power Utility Requirements

Van Tu Dao, Hideo Ishii, and Yasuhiro Hayashi,

Int. J. Electrical Power and Energy Systems 2019-2019

Machine Learning Approach for Graphical Model-Based Analysis of Energy-Aware Growth Control in Plant Factories

Yu Fujimoto, Saya Murakami, Nanae Kaneko, Hideki Fuchikami, Toshirou Hattori, Yasuhiro Hayashi

IEEE Access 7(1) p.32183 - 321962019-2019

Feature extraction of NWP data for wind power forecasting using 3D-convolutional neural networks

Kazutoshi Higashiyama, Yu Fujimoto, Yasuhiro Hayashi

Energy Procedia, Volume 155 1552018/11-2018/11

Expected Wind Speed Estimation Considering Spatio-Temporal Anisotropy for Generating Synthetic Wind Power Profiles

Kouki Hama, Yu Fujimoto, Yasuhiro Hayashi

Energy Procedia, Volume 155 1552018/11-2018/11

Temporal Interpolation of Gridded Solar Radiation Data for Evaluation of PV Fluctuations

Daigo Hirooka, Noboru Murata, Yu Fujimoto, Yasuhiro Hayashi

Energy Procedia, Volume 155 1552018/11-2018/11

Proposal and Evaluation of determination method for multiobjective output dispatch of frequency control generators to compensate for renewable energy system fluctuation in multiarea system operation

Akihisa Kaneko, Yasuhiro Hayashi, Shunsuke Nonaka

Electric Engineering in Japan, Vol.205, Issue 1 205(1) 2018/10-2018/10

Electricity Adjustment by Aggregation Control of Multiple District Heating and Cooling Systems

Kohei Tomita , Masakazu Ito, Yasuhiro Hayashi, Takahiro Yagi, Tatsuya Tsukada

Energy Procedia, Volume 149 1492018/09-2018/09

Operation planning method for home air-conditioners considering characteristics of installation environment

Ryoichi Kuroha, Yu Fujimoto, Wataru Hirohashi, Yoshiharu Amano, Shi-ichi Tanabe, Yasuhiro Hayashi

Energy & Buildings, Vol. 177 1772018/09-2018/09

Upgrading Voltage Control Method Based onPhotovoltaic Penetration Rate

Satoru Akagi, Ryo Takahashi, Akihisa Kaneko, Masakazu Ito, Jun Yoshinaga, Yasuhiro Hayashi, Hiroshi Asano, Hiromi Konda

IEEE TRANSACTIONS ON SMART GRID, VOL. 9, NO. 5 9(5) 2018/09-2018/09

Energy cost minimization in plant factories considering weather factors using additive Bayesian networks

Saya Murakami, Yu Fujimoto, Yasuhiro Hayashi, Hideki Fuchikami, Toshirou Hattori

Journal of International Council on Electrical Engineering, 2018, Vol.8, No.1 8(1) 2018/07-2018/07

Optimal Parameters of Volt-Var Functions for Photovoltaic Smart Inverters in Distribution Networks

Van Tu Dao, Hideo Ishii, Yasuhiro Hayashi

IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING 2018/07-2018/07

Evaluation of Annual Energy Loss Reduction Based on Reconfiguration Scheduling

Yuji Takenobu, Norihito Yasuda, Shunsuke Kawano, Yasuhiro Hayashi, Shin-ichi Minato

IEEE Transactions on Smart Grid, Vol. 9, Issue 3 9(3) 2018/05-2018/05

Versatile Modeling Platform for Cooperative Energy Management Systems in Smart Cities

Yasuhiro Hayashi, Yu Fujimoto, Hideo Ishii, Yuji Takenobu, Hiroshi Kikusato, Shinya Yoshizawa, Yoshiharu Amano, Shin-Ichi Tanabe, Yohei Yamaguchi, Yoshiyuki Shimoda, Jun Yoshinaga, Masato Watanabe, Shunsuke Sasaki, Takeshi Koike, Hans-Arno Jacobsen, Kevin Tomsovic

Proceedings of the IEEE, Vol.106, No.4 106(4) 2018/04-2018/04

Electric Vehicle Charge-Discharge Management for Utilization of Photovoltaic by Coordination between Home and Grid Energy Management Systems

Hiroshi Kikusato, Kohei Mori, Shinya Yoshizawa, Yu Fujimoto, Hiroshi Asano, Yasuhiro Hayashi, Akihiko Kawashima, Shinkichi Inagaki, Tatsuya Suzuki

IEEE Transactions on Smart Grid 2018/03-2018/03

Distributed energy management for comprehensive utilization of residential photovoltaic outputs

Fujimoto, Yu; Kikusato, Hiroshi; Yoshizawa, Shinya; Kawano, Shunsuke; Yoshida, Akira; Wakao, Shinji; Murata, Noboru; Amano, Yoshiharu; Tanabe, Shin Ichi; Hayashi, Yasuhiro

IEEE Transactions on Smart Grid 9(2) p.1216 - 12272018/01-2018/01

DOIScopus

Detail

ISSN:19493053

Outline:© 2016 IEEE. The introduction of photovoltaic power systems is being significantly promoted. This paper proposes the implementation of a distributed energy management framework linking demand-side management systems and supply-side management system under the given time-of-use pricing program for efficient utilization of photovoltaic power outputs; each system implements a consistent management flow composed of forecasting, operation planning, and control steps. In our framework, demand-side systems distributed in the electric distribution network manage individual energy consumption to reduce the residential operating cost by utilizing the residential photovoltaic power system and controllable energy appliances so as not to inconvenience residents. On the other hand, the supply-side system utilizes photovoltaic power maximally while maintaining the quality of electric power. The effectiveness of the proposed framework is evaluated on the basis of an actual Japanese distribution network simulation model from both the supply-side and demand-side viewpoints.

An evaluation of economical capacity of storage battery equipped with residential PV system and reverse power flow pattern

Yabe, Kuniaki; Hayashi, Yasuhiro

IEEJ Transactions on Power and Energy 138(2) p.175 - 1822018/01-2018/01

DOIScopus

Detail

ISSN:03854213

Outline:© 2018 The Institute of Electrical Engineers of Japan. This paper presents an evaluation of economical capacity of storage batteries equipped with residential PV systems. In around 2019, many of power companies' ten-year contracts with PV system owners will come to expire, pushing down the selling price of PV generated energy. This, if combined with a declining battery price, would make it more economical to self-consume PV generated energy than selling the electricity to the utilities. The authors explore the optimized storage battery capacity and charge-discharge pattern by using load and PV output data of 200 houses, and by linear programming. Results show 5.8 kWh battery is suitable for an average house with 4.5 kW PV system when the battery system price is about Y60,000/kWh. The authors analyze the daily storage start timing's impact on reverse power which affects power system operation, the optimum combination of PV and battery capacity, and each house's deciding factors for optimum storage capacity and so on.

Stochastic receding horizon control minimizing mean-variance with demand forecasting for home EMSs

Akira Yoshida, Jun Yoshikawa, Yu Fujimoto, Yoshiharu Amano, Yasuhiro Hayashi

Energy and Buildings, Vol.158, 1 158(1) 2018/01-2018/01

Prevention of Output Suppression through Heat Pump Water Heaters for High-Penetration Residential PV Systems for Long-Term Operation

Miyamoto, Yusuke; Hayashi, Yasuhiro

Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi) 201(2) p.32 - 482017/11-2017/11

DOIScopus

Detail

ISSN:04247760

Outline:© 2017 Wiley Periodicals, Inc. There is a danger of output suppression of high-penetration residential photovoltaic systems due to voltage increase. It is necessa1ry to install new technology to prevent the occurrence of such phenomenon. Therefore, we focused our attention on heat-pump water heaters (HPWHs). HPWHs are usually used to heat water during nighttime because electricity prices are cheaper than during the daytime for the load leveling in Japan. So they can be used as a countermeasure without additional cost if they are operated during the daytime. However, HPWHs do not have sufficient capacity to absorb inverse energy at each residence. Thus, HPWH operation must be optimized to minimize output suppression loss. In this research, we selected four typical sunny days in spring, summer, autumn, and winter. The optimal HPWH operation was calculated by numerical simulation. The optimal monthly HPWH operation was investigated using the weather forecast assuming actual operation in each season.

Electricity adjustment for capacity market auction by a district heating and cooling system

Ito, Masakazu; Takano, Akihisa; Shinji, Takao; Yagi, Takahiro; Hayashi, Yasuhiro; Hayashi, Yasuhiro

Applied Energy 206p.623 - 6332017/11-2017/11

DOIScopus

Detail

ISSN:03062619

Outline:© 2017 The Authors Power grids connected to renewable energy sources must cope with fluctuating output by those sources. One method to do so is for the power grid company to accept bids to increase grid stability. These bids are accepted via capacity market auction of increasing grid stability. These offers are to increase the maximum power capacity by using power stations (both utility and non-utility stations) and by reducing electricity consumption via demand response. One candidate for achieving this is a district heating and cooling (DHC) system installed with combined heat and power. However, the electricity adjustment (EA) operation needed by the DHC for the auction is complicated because the system consists of boilers, water heaters, chillers, generators, and other items. To investigate the possibility of using DHC systems for capacity market auctions, this paper proposes two models for operating a DHC system: electricity-adjustment capacity (EAC) provision and EA operation. In addition, to develop methods for evaluating the cost of the proposed operational methods, a model DHC system is formulated with an actual DHC system as a basis. Using the models, numerical simulations are conducted by particle swarm optimization. Then, the running costs of EAC, EA, and normal operation are calculated. The results show that the running costs of the proposed operations are relatively stable by day and season, not varying beyond the range of ±10%. Nevertheless, the running costs in spring and fall are be lower than those in summer and winter. The cost of providing EAC is no more than 1% the cost of normal operation, and the cost of EA itself is no more than 2% that of normal operation.

Voltage and energy loss assessment for systems with smart inverter functions of rooftop solar

Dao, Van Tu; Ishii, Hideo; Hayashi, Yasuhiro

ECTI-CON 2017 - 2017 14th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology p.159 - 1622017/11-2017/11

DOIScopus

Detail

Outline:© 2017 IEEE. In order to coordinate controlling devices of utilities in medium-voltage networks with large-scale photovoltaic (PV) inverters, a revelation of clustered impacts of rooftop solar panels in PV dominated low-voltage networks is necessary. This paper first investigates impacts of smart functions on system performance if they are installed in rooftop solar inverters. An optimization is then formulated based on conflicts that have been revealed. Through simulations in a typical Japan low-voltage system with real data, investigation and optimization results show that optimal inverter settings for rooftop solar are feasible and they could help improve system performance.

Prevention of Output Suppression through Heat Pump Water Heaters for High-Penetration Residential PV Systems for Long-Term Operation

Yusuke Miyamoto, Yasuhiro Hayashi

IEEJ Transactions on Power and Energy, 135 (7) 135(7) 2017/11-2017/11

Optimal allocation of photovoltaic systems and energy storage systems considering constraints of both transmission and distribution systems

Konishi, Ryusuke; Konishi, Ryusuke; Takenobu, Yuji; Takenobu, Yuji; Takahashi, Masaki; Takahashi, Masaki; Hayashi, Yasuhiro; Hayashi, Yasuhiro

2017 IEEE Power and Energy Society Innovative Smart Grid Technologies Conference, ISGT 2017 2017/10-2017/10

DOIScopus

Detail

Outline:© 2017 IEEE. As more photovoltaic systems (PVs) are allocated to both transmission and distribution systems, it has been required to consider constraints of both transmission and distribution systems, such as power shortages and surpluses in transmission systems and voltages and current in distribution systems. This research proposes the framework to consider these constraints, and formulates the optimal allocation of PVs and energy storage systems (ESSs) to prevent the violation of the above constraints.

Forecast of Infrequent Wind Power Ramps Based on Data Sampling Strategy

Yuka Takahashi, Yu Fujimoto, Yasuhiro Hayashi

Energy Procedia, Vol.135 1352017/10-2017/10

Optimal coordination of voltage controllable devices in distribution systems using power-based models and quadratic programming

Tu Van Dao, Surachai Chaitusaney, Yasuhiro Hayashi, Hideo Ishii

IEEJ Transactions on Electrical and Electronic Engineering Peer Review Yes 12p.S54 - S642017/06-2017/06

DOIlinkScopus

Detail

ISSN:19314973

Outline:The incorporation of photovoltaic (PV) inverters makes the management of voltage difficult for power system operators. One solution is to consider these inverter-based devices as controllable reactive power (VAr) sources and to coordinate them with other voltage regulating devices in the distribution system. This paper proposes some acceptable approximations to quickly formulate and solve a mixed-integer quadratic programming problem to periodically determine the optimal voltage coordination of a load tap changer, voltage regulators, capacitor banks, and PVs on a smart grid platform. The solution to the optimization problem is aided by an iteration-based algorithm. By using the MATLAB software to carry out the simulation and computation, the method is well verified by comparing its generated result with a trustworthy solution obtained from examining all possible coordinating combinations of voltage regulating devices and PVs in a modified IEEE 34-bus system. The effectiveness and features of the method are clearly illustrated on that test system by considering a time-varying load and PV generation. The obtained results demonstrate the practical application of this work to medium-voltage systems. © 2017 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

Control methods for an energy storage system when wind power output deviates from grid code

Masakazu Ito, Yu Fujimoto, Masataka Mitsuoka, Hideo Ishii and Yasuhiro Hayashi

JOURNAL OF INTERNATIONAL COUNCIL ON ELECTRICAL ENGINEERING Peer Review Yes 7(1) p.159 - 1652017/06-2017/06

DOIlink

Detail

Outline:Because of the rapid growth of wind power, an electric grid company set the maximum change rate in a time window to share its fluctuation; this set maximum change rate in a time window is called the grid code. Large fluctuations of wind power may cause deviation from the grid code, but no studies discuss how to control an energy storage system (ESS) so that it quickly goes back to satisfying the grid code. The authors proposed three control methods for an ESS when the wind power output deviates; they are (1) ‘restart’, (2) ‘continuance without operation’, and (3) ‘continuance with operation’. One year numerical simulations with two types of grid codes and two wind power output data have been performed to evaluate the methods. From the studies, control method (3) is found to be the best control method for an ESS to minimize capacity when the wind power output deviates from the grid code, and is verified by the numerical simulations. These results help to answer questions on how to reduce deviation time and ESS capacity using the control method when the wind power output deviates from the grid code.

Generating Synthetic Profiles of Onshore Wind Power for Power Flow Simulation on Power System

Fujimoto, Yu; Furuya, Seigo; Hayashi, Yasuhiro; Osaka, Tetsuya

Journal of Energy Engineering 143(3) 2017/06-2017/06

DOIScopus

Detail

ISSN:07339402

Outline:© 2016 American Society of Civil Engineers. An increased penetration of wind energy into the power system will lead to instability of local voltage and global frequency in Japan. Power flow simulation is a powerful tool for understanding the electrical behavior in the power system caused by wind energy; however, plausible and various wind power profiles are required to perform a meaningful simulation to evaluate the effect of wind generators. This paper proposes a procedure of generating synthetic wind power profiles that involve the plausible short-term fluctuation for a power flow simulation based on the spatial kriging method and the bootstrap method.

Voltage Control Method Utilizing Solar Radiation Data in High Spatial Resolution for Service Restoration in Distribution Networks with PV

Kawano, Shunsuke; Fujimoto, Yu; Wakao, Shinji; Hayashi, Yasuhiro; Takenaka, Hideaki; Irie, Hitoshi; Nakajima, Takashi Y.

Journal of Energy Engineering 143(3) 2017/06-2017/06

DOIScopus

Detail

ISSN:07339402

Outline:© 2016 American Society of Civil Engineers. This paper proposes a voltage control method during service restoration in the distribution networks with photovoltaic (PV) generator systems. In the current distribution automation system (DAS) process in Japan, voltage dips and surges occur during service restoration because PVs are disconnected simultaneously after a fault and subsequently reconnected after service restoration. However, in the current DAS, voltage regulators such as an on-load tap changer (OLTC) and step voltage regulators (SVRs) are not controlled during service restoration. The proposed DAS estimates the voltage in a distribution network during service restoration, and it controls the tap position of OLTC and/or SVRs according to the predicted voltage. The numerical simulation results using a real-world distribution system model on a real map and PV output profiles derived by actual square kilometer solar radiation data will be shown. Those results indicate that the proposed DAS prevents voltage deviation that occurs as long as the current DAS is used. The results also show high spatial resolution PV output data are needed to prevent voltage deviation absolutely.

Optimal coordination of voltage controllable devices in distribution systems using power-based models and quadratic programming

Van Dao, Tu; Chaitusaney, Surachai; Hayashi, Yasuhiro; Ishii, Hideo

IEEJ Transactions on Electrical and Electronic Engineering 12p.S54 - S642017/06-2017/06

DOIScopus

Detail

ISSN:19314973

Outline:© 2017 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc. The incorporation of photovoltaic (PV) inverters makes the management of voltage difficult for power system operators. One solution is to consider these inverter-based devices as controllable reactive power (VAr) sources and to coordinate them with other voltage regulating devices in the distribution system. This paper proposes some acceptable approximations to quickly formulate and solve a mixed-integer quadratic programming problem to periodically determine the optimal voltage coordination of a load tap changer, voltage regulators, capacitor banks, and PVs on a smart grid platform. The solution to the optimization problem is aided by an iteration-based algorithm. By using the MATLAB software to carry out the simulation and computation, the method is well verified by comparing its generated result with a trustworthy solution obtained from examining all possible coordinating combinations of voltage regulating devices and PVs in a modified IEEE 34-bus system. The effectiveness and features of the method are clearly illustrated on that test system by considering a time-varying load and PV generation. The obtained results demonstrate the practical application of this work to medium-voltage systems. © 2017 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

Coordinated voltage control of load tap changers in distribution networks with photovoltaic system

Kikusato, Hiroshi; Kobayashi, Masaya; Yoshinaga, Jun; Fujimoto, Yu; Hayashi, Yasuhiro; Kusagawa, Shinichi; Motegi, Noriyuki

IEEE PES Innovative Smart Grid Technologies Conference Europe 2017/02-2017/02

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Outline:© 2016 IEEE. Maintaining voltage levels in distribution networks (DNs) with photovoltaic systems (PVs) is a complicated task for conventional voltage control schemes that only use a load ratio control transformer (LRT) and step voltage regulators (SVRs), because of local voltage fluctuation caused by the introduction of PVs. This paper proposes a coordinated voltage control scheme consisting of multiple kinds of load tap changers (LTCs). The proposed scheme determines the location at which to introduce low-voltage regulators (LVRs) and provides control parameters for the LTCs by considering the behavior of the other LTCs. We carried out numerical simulations using a DN model including PVs to verify the validity of the proposed scheme. The results specify the characteristics of the voltage deviation that cannot be prevented by a conventional voltage control scheme, and the proposed scheme significantly reduces such local voltage deviation.

Deployment of low-voltage regulator considering existing voltage control in medium-voltage distribution systems

Hiroshi Kikusato, Jun Yoshinaga, Yu Fujimoto, Yasuhiro Hayashi, Shinichi Kusagawa, Noriyuki Motegi

Journal of Internatinal Council on Electrical Engineering (JICEE), Vol.6, No.1 6(1) 2016/12-2016/12

Upgrading Voltage Control Method Based on Photovoltaic Penetration Rate

Satoru Akagi, Ryo Takahashi, Akihisa Kaneko, Masakazu Ito, Jun Yoshinaga, Yasuhiro Hayashi

IEEE Transactions on Smart Grid, VOL.9, No.5 9(5) 2016/12-2016/12

Reproducing Statistical Property of Short-term Fluctuation in Wind Power Profiles

Seigo Furuya, Yu Fujimoto, Noboru Murata, Yasuhiro Hayashi

Energy Procedia, 99 992016/11-2016/11

Coordinated Voltage Control of Load Tap Changers in Distriution Networks with Photovoltaic System

Hiroshi Kikusato, Masaya Kobayashi, Jun Yoshinaga, Yu Fujimoto, Yasuhiro Hayashi

IEEE PES Innovative Smart Grid Technologies, Europe p.1 - 62016/10-

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Detail

Publish Classification:Research paper (international conference proceedings)

Outline:Maintaining voltage levels in distribution networks (DNs) with photovoltaic systems (PVs) is a complicated task for conventional voltage control schemes that only use a load ratio control transformer (LRT) and step voltage regulators (SVRs), because of local voltage fluctuation caused by the introduction of PVs. This paper proposes a coordinated voltage control scheme consisting of multiple kinds of load tap changers (LTCs). The proposed scheme determines the location at which to introduce low-voltage regulators (LVRs) and provides control parameters for the LTCs by considering the behavior of the other LTCs. We carried out numerical simulations using a DN model including PVs to verify the validity of the proposed scheme. The results specify the characteristics of the voltage deviation that cannot be prevented by a conventional voltage control scheme, and the proposed scheme significantly reduces such local voltage deviation.

Design and construction of zero energy house: - Waseda University "Nobi-Nobi HOUSE"

Nagasawa, Natsuko; Shibutani, Ayane; Matsunaga, Tomohiro; Tanabe, Shin Ichi; Furuya, Nobuaki; Watanabe, Naoya; Hirohashi, Wataru; Hayashi, Yasuhiro

AIJ Journal of Technology and Design 22(52) p.1049 - 10522016/10-2016/10

DOIScopus

Detail

ISSN:13419463

Outline:Waseda University and various enterprises proposed a Zero-Energy-House(ZEH) called "Nobi-Nobi HOUSE" in ENEMANEHOUSE2014. In this ZEH, we carried out a design for the ZEH technology, and was build in Tokyo at January 2014. After the relocated in Shizuoka, it was measured every four seasons in energy consumption, electric-generating capacity and indoor environment. This report shows design of "Nobi-Nobi HOUSE" for ZEH and result of measurement.

Method for enumerating feasible LDC parameters for OLTC and SVR in distribution networks

Kawano, Shunsuke; Yoshizawa, Shinya; Hayashi, Yasuhiro

Proceedings of the 2nd International Conference on Intelligent Green Building and Smart Grid, IGBSG 2016 2016/08-2016/08

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Detail

Outline:© 2016 IEEE.This paper presents a method for enumerating the feasible load drop compensator (LDC) parameters of on-load tap changer (OLTC) and step voltage regulators (SVRs) in distribution networks utilizing data acquired by SCADA. Deriving the feasible combinations of LDC parameters is becoming important because voltage control is becoming difficult due to the introduction of photovoltaic generation systems, and the voltage control effectiveness of OLTC and SVRs depends on their three LDC parameters: the target voltage, the dead-band, and the impedance. However, an exhaustive search takes a lot of time and heuristics or metaheuristics provide no guarantee on the quality of the solution. The proposed method derives all the feasible LDC parameters, with which tap operation keeping voltage within the proper range is performed, within practical time. To evaluate the performance of the proposed method, the numerical simulation results of the proposed method will be compared with those of the metaheuristics.

Maximizing hosting capacity of distributed generation by network reconfiguration in distribution system

Takenobu, Yuji; Kawano, Shunsuke; Hayashi, Yasuhiro; Yasuda, Norihito; Minato, Shin Ichi

19th Power Systems Computation Conference, PSCC 2016 2016/08-2016/08

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Detail

Outline:© 2016 Power Systems Computation Conference.The maximization of distributed generation (DG) hosting capacity that takes into account network configuration is a complex, non-linear combinatorial optimization problem. The search space of the configurations becomes massively large in practical-size networks with several hundreds of switches. For this reason, no existing method can handle such large-scale networks. In this paper, we propose a novel exact solution method. Our method consists of two stages. In the first stage, the method divides the entire problem into a set of small subproblems. In the second stage, it converts all subproblems into a compressed data structure called a zero-suppressed binary decision diagram (ZDD), which expresses the combinatorial sets compactly. The proposed method avoids any combinatorial explosion by using the ZDD to enable operations of the weighted combinatorial item sets. We conducted experiments on a large-scale network with 235 switches. As a result, our method obtained the global optimal solution in 49 hours.

Detection of Cyber Attacks Against Voltage Control in Distribution Power Grids with PVs

Isozaki, Yasunori; Yoshizawa, Shinya; Fujimoto, Yu; Ishii, Hideaki; Ono, Isao; Onoda, Takashi; Hayashi, Yasuhiro

IEEE Transactions on Smart Grid 7(4) p.1824 - 18352016/07-2016/07

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Detail

ISSN:19493053

Outline:© 2010-2012 IEEE.In this paper, we consider the impact of cyber attacks on voltage regulation in distribution systems when a number of photovoltaic (PV) systems are connected. We employ a centralized control scheme that utilizes voltage measurements from sectionizing switches equipped with sensors. It is demonstrated that if measurements are falsified by an attacker, voltage violation can occur in the system. However, by equipping the control with a detection algorithm, we verify that the damage can be limited especially when the number of attacked sensors is small through theoretical analysis and simulation case studies. In addition, studies are made on attacks which attempt to reduce the output power at PV systems equipped with overvoltage protection functions. Further discussion is provided on how to enhance the security level of the proposed algorithm.

Centralized voltage control method using voltage forecasting by JIT modeling in distribution networks

Kawano, Shunsuke; Yoshizawa, Shinya; Hayashi, Yasuhiro

Proceedings of the IEEE Power Engineering Society Transmission and Distribution Conference 2016-July2016/07-2016/07

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Detail

ISSN:21608555

Outline:© 2016 IEEE.This paper presents an enhanced centralized voltage control method of on-load tap changer (OLTC) and step voltage regulators (SVRs) in distribution systems with photovoltaic (PV) and evaluates its effectiveness. A conventional centralized voltage control is effective when its data acquisition period is short because tap operations of OLTC and SVRs are performed after the voltage values in the distribution lines are acquired. However, in distribution systems with high penetration rate of PVs, voltage deviation occurs between the data acquisition intervals because the tap positions can be changed only at the timing when the data are acquired. The proposed centralized voltage control method forecasts voltage fluctuation between the data acquisition intervals and changes to the tap position which maximizes the minimum voltage margin from the voltage limits. The numerical simulation results will be shown to compare the voltage control effectiveness of the proposed method with that of the conventional method.

Detection of Cyber Attacks Against Voltage Control in Distribution Power Grids With PVs

Yasunori Isozaki, Shinya Yoshizawa, Yu Fujimoto, Hideaki Ishii, Isao Ono, Takashi Onoda, Yasuhiro Hayashi

IEEE Transactions on Smart Grid, Vol.7, No.4 7(4) 2016/07-2016/07

Robust Operation Planning Method for Integrated Solid Oxide Fuel Cells in a Collective Housing with Electric Power Interchange System Considering Uncertainty in Demand Forecast

Runa Kato, Yu Fujimoto, Yasuhiro Hayashi

IEEJ Transactions on Power and Energy Peer Review Yes 136(6) p.528 - 5362016/06-

Detail

Outline:The subject of this study is to propose a power interchange system in a collective housing with residential solid oxide fuel cells (SOFCs) and a robust operation planning method for integrated SOFCs against uncertain energy demand forecast. In this method, the future operation plan for multiple SOFCs is optimized and determined to minimize the expected total primary energy consumption in the collective housing considering uncertainty in demand forecast. If the forecast energy demand includes forecast errors, the result of SOFCs operation will corrupt from the viewpoint of the primary energy consumption. Thus, the output decision problem for SOFCs is formulated by considering the corruption caused by forecast errors, so that the decided SOFC outputs have the robustness against uncertainty in demand forecast. The validity of the proposed method is examined based on numerical simulations from the perspective of the robustness.

Estimation Prediction Interval of Solar Irradiance Based on Just-in-Time Modeling for Photovoltaic Output Prediction

Yamazaki, Tomohide; Yamazaki, Tomohide; Homma, Hayato; Homma, Hayato; Wakao, Shinji; Wakao, Shinji; Fujimoto, Yu; Hayashi, Yasuhiro; Hayashi, Yasuhiro

Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi) 195(3) p.1 - 102016/05-2016/05

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Detail

ISSN:04247760

Outline:© 2016 Wiley Periodicals, Inc. Photovoltaic (PV) systems have recently attracted considerable attention in the context of environmental problems, antinuclear power movements, and energy problems. Therefore, the large-scale introduction of PV systems is expected in the near future. But the connection of many PV systems to the power system leads to problems. For example, the system voltage often drifts from the norm when reverse power flows increase. Accordingly, optimal system operation is required in order to make maximum use of solar energy to the maximum by installing energy buffers such as storage batteries. In particular, in forecast information, knowledge of the reliability as well as the predicted solar irradiance is essential for effective operation. In this paper, we propose a way of estimating the prediction interval of solar irradiance as an index of reliability by using just-in-time modeling. We consider the accuracy of the prediction interval under many conditions and derive a high-precision estimation method. In addition, we also discuss about the future subjects of study.

Experimental Demonstration of Smart Charging and Vehicle-to-Home Technologies for Plugin Electric Vehicles Coordinated with Home Energy Management Systems for Automated Demand Response

Takayuki Shimizu, Tomoya Ono, Wataru Hirohashi, Kunihiko Kumita, Yasuhiro Hayashi

SAE International Journal of Passenger Cars - Electronic and Electrical Systems, 9 (2) 9(2) 2016/04-2016/04

Cooperating Voltage Control Method between Battery Energy Storage System and LRT and SVR for Purpose of Expansion of PV Introduction

Jun Yoshinaga, Satoru Akagi, Masakazu Ito, Yasuhiro Hayashi, Kazunari Ishibashi

IEEJ Transactions on Power and Energy 136(3) p.291 - 3012016/03-

Detail

Outline:Voltage deviation in distribution networks and photovoltaic (PV) output restriction, caused by a large amount of PV systems installation, have been issued recently. BESS (Battery Energy Storage System) is one of the solutions. However, the detailed evaluation of the voltage control effect of BESS has not been carried out, because its effect varies according to BESS placement, its output and configuration of distribution, etc. Therefore, the amount of PV introduction limits in several distribution networks were evaluated and effective BESS arrangement and output control were examined in this paper. The effectiveness of the proposed BESS cooperating voltage control method with LRT, SVR was verified using numerical simulation and experiment of distribution system simulator.

Effectiveness of Improvement of Benefit of the Electric Power Selling Charges and Electricity Charges using Battery Storage System and Heat Pump Water Heater for High Penetration PV

Yusuke Miyamoto, Yasuhiro Hayashi

IEEJ Transactions on Power and Energy Peer Review Yes 136(3) p.245 - 2582016/03-

Detail

Publish Classification:Research paper (scientific journal) ISSN:1348-8147

Outline:Recently home energy management system (HEMS) has been spread due to increase in awareness of save energy after Great East Japan Earthquake. HEMS consists of photovoltaic power system (PV), battery energy storage system (BESS) and heat pump water heater (HPWH), etc. Residential PV implementation rate has been increasing due to feed in tariff from 2009. So there is a danger of output suppression loss due to voltage increase on a distribution line due to reverse power flow from each residential PV. So we try to study how to reduce output suppression loss using BESS and HPWH optimally. One of the main purpose to implement BESS and HPWH is for economy using the difference in electricity charges between during nighttime and daytime. So in this research, we optimize how to operate BESS and HPWH to improve the benefit of the electric power selling charges and electricity charges considering reduction of output suppression loss and the difference in electricity charges between during nighttime and daytime.

Generating Synthetic Profiles of Onshore Wind Power for Power Flow Simulation on Power System

Yu Fujimoto, Seigo Furuya, Yasuhiro Hayashi, Tetsuya Osaka

Journal of Energy Engineering 2016/03-

Effectiveness of improvement of benefit of the electric power selling charges and electricity charges using battery storage system and heat pump water heater for high penetration PV

Miyamoto, Yusuke; Miyamoto, Yusuke; Hayashi, Yasuhiro

IEEJ Transactions on Power and Energy 136(3) p.245 - 2582016/01-2016/01

DOIScopus

Detail

ISSN:03854213

Outline:© 2016 The Institute of Electrical Engineers of Japan. Recently home energy management system (HEMS) has been spread due to increase in awareness of save energy after Great East Japan Earthquake. HEMS consists of photovoltaic power system (PV), battery energy storage system (BESS) and heat pump water heater (HPWH), etc. Residential PV implementation rate has been increasing due to feed in tariff from 2009. So there is a danger of output suppression loss due to voltage increase on a distribution line due to reverse power flow from each residential PV. So we try to study how to reduce output suppression loss using BESS and HPWH optimally. One of the main purpose to implement BESS and HPWH is for economy using the difference in electricity charges between during nighttime and daytime. So in this research, we optimize how to operate BESS and HPWH to improve the benefit of the electric power selling charges and electricity charges considering reduction of output suppression loss and the difference in electricity charges between during nighttime and daytime.

Power and hour capacity requirement for an energy storage from grid codes

Ito, Masakazu; Fujimoto, Yu; Mitsuoka, Masataka; Ishii, Hideo; Hayashi, Yasuhiro

Asia-Pacific Power and Energy Engineering Conference, APPEEC 2016-January2016/01-2016/01

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Detail

ISSN:21574839

Outline:© 2015 IEEE. This paper studied power and hour capacity requirement for energy storage by two approaches. First one is evaluations without constrained condition of power and hour capacity with 80 sets of maximum ramp rates and time windows. And second one is evaluations with constrained condition of power and hour capacity for 2 grid codes (less than 0.1pu change of wind farm (WF) capacity in 20min time window, showing 0.1pu/20min in this paper, and 0.3pu/360min) to see details. The first evaluation in case of 3a resulted 1.0 pu power capacity (charge plus discharge capacity for all result) and 1.3 to 2.2 pu-h hour capacity are required to satisfy maximum ramp rate in time window of 0.1pu/20min. And 1.2 to 1.3 pu and 13 to 18 pu-h are required for 0.3pu/360min. And from the second evaluation in case of 3a, 0.7 to 0.8 pu power capacity and 1 to 2 pu-h for 0.1pu/20min and 1.0 pu and 10 to 15 pu-h are required for 0.3pu/360min. This paper provides relationship between maximum ramp rate in time windows and power and hour capacity requirement. The results help to answer questions whether power and hour capacity requirement satisfy grid codes with simple operating method of an energy storage system.

Study on business continuity capability by cooperative operation of photovotaic and battery energy storage system

Maruyama, Hiroki; Ishii, Hideo; Hayashi, Yasuhiro; Onojima, Hajime; Kojima, Yoshikane

Asia-Pacific Power and Energy Engineering Conference, APPEEC 2016-January2016/01-2016/01

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Detail

ISSN:21574839

Outline:© 2015 IEEE. In this study, as a new index of facilities, business continuity capability on occasion of an energetically isolated operation, was defined and evaluated for the facility with a rich amount of resources such as private generators, a battery energy storage system and a PV generation system. A methodology was proposed to evaluate a duration during which the facility is self- sustaining regarding energy use. An effect of reducing the capacity of PV or battery was also examined.

Voltage fluctuation issue on distribution system at time of demand response and cooperating voltage control method between battery energy storage system and SVR

Yoshinaga, Jun; Yoshinaga, Jun; Akagi, Satoru; Akagi, Satoru; Ito, Masakazu; Ito, Masakazu; Hayashi, Yasuhiro; Hayashi, Yasuhiro; Ishibashi, Kazunari; Takahasi, Naoyuki; Takahasi, Naoyuki

IEEJ Transactions on Power and Energy 136(4) p.400 - 4092016/01-2016/01

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Detail

ISSN:03854213

Outline:© 2016 The Institute of Electrical Engineers of Japan. Demand response can achieve peak-cut and peak-shift of the electric demand by delivering the load restraint of customers, based on Demand Response (DR) signal sent by an electric power company. However, the demand response restrains the load amount of many consumers simultaneously, so the voltage of the whole distribution system is greatly fluctuated depending on the distribution form such as line length, amount of load restraint, etc. Therefore, we propose the voltage control methods which can avoid voltage deviation in consideration of a time constant of demand response. Furthermore, we propose the BESS cooperating voltage control methods with LRT, SVR and verify the effectiveness using experiment of distribution system simulator.

Distributed Energy Management for Comprehensive Utilization of Residential Photovoltaic Outputs

Yu Fujimoto Hiroshi Kikusato ; Shinya Yoshizawa ; Shunsuke Kawano ; Akira Yoshida ; Shinji Wakao ; Noboru Murata ; Yoshiharu Amano ; Shin-ichi Tanabe ; Yasuhiro Hayashi

IEEE Transactions on Smart Grid Peer Review Yes PP(99) 2016/01-

Detail

Outline:The introduction of photovoltaic power systems is being significantly promoted. This paper proposes the implementation of a distributed energy management framework linking demand-side management systems and supply-side management system under the given time-of-use pricing program for efficient utilization of photovoltaic power outputs; each system implements a consistent management flow composed of forecasting, operation planning, and control steps. In our framework, demandside systems distributed in the electric distribution network manage individual energy consumption to reduce the residential operating cost by utilizing the residential photovoltaic power system and controllable energy appliances so as not to inconvenience residents. On the other hand, the supply-side system utilizes photovoltaic power maximally while maintaining the quality of electric power. The effectiveness of the proposed framework is evaluated on the basis of an actual Japanese distribution network simulation model from both the supply-side and demand-side viewpoints

Determination of the most suitable voltage control method depending on photovoltaic installation rate

Akagi, Satoru; Takahashi, Ryo; Kaneko, Akihisa; Ito, Masakazu; Yoshinaga, Jun; Hayashi, Yasuhiro; Konda, Hiromi

Asia-Pacific Power and Energy Engineering Conference, APPEEC 2016-January2016/01-2016/01

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Detail

ISSN:21574839

Outline:© 2015 IEEE.In this study, we determine the suitable method and timing for the renewal of the voltage control method using voltage control performance evaluated by the maximum photovoltaic (PV) installation rate possible without voltage deviation. The voltage control method is renewed when the voltage of a distribution system deviates with an existing voltage control method. We determine the most suitable voltage control method, which extends the most PV systems, and define its renewal timing as the moment when the PV installation causes voltage deviation. For the renewal of the voltage control method, changing the control operation of a load ratio control transformer (LRT) and the additional installation of a static VAR compensator (SVC) are considered. A numerical simulation is performed to calculate the limit of PV installation rate of each voltage control method to determine the suitable one and its renewal timing.

Robust operation planning method for integrated solid oxide fuel cells in a collective housing with electric power interchange system considering uncertainty in demand forecast

Kato, Runa; Fujimoto, Yu; Hayashi, Yasuhiro

IEEJ Transactions on Power and Energy 136(6) p.528 - 5362016/01-2016/01

DOIScopus

Detail

ISSN:03854213

Outline:© 2016 The Institute of Electrical Engineers of Japan.The subject of this study is to propose a power interchange system in a collective housing with residential solid oxide fuel cells (SOFCs) and a robust operation planning method for integrated SOFCs against uncertain energy demand forecast. In this method, the future operation plan for multiple SOFCs is optimized and determined to minimize the expected total primary energy consumption in the collective housing considering uncertainty in demand forecast. If the forecast energy demand includes forecast errors, the result of SOFCs operation will corrupt from the viewpoint of the primary energy consumption. Thus, the output decision problem for SOFCs is formulated by considering the corruption caused by forecast errors, so that the decided SOFC outputs have the robustness against uncertainty in demand forecast. The validity of the proposed method is examined based on numerical simulations from the perspective of the robustness.

Energy disaggregation based on semi-binary NMF

Matsumoto, Masako; Fujimoto, Yu; Hayashi, Yasuhiro

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 9729p.401 - 4142016/01-2016/01

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Detail

ISSN:03029743

Outline:© Springer International Publishing Switzerland 2016.The large-scale introduction of renewable energy resources will cause instability in the power supply. Residential energy management systems will be even more important in the near future. An important function of such systems is visualization of appliance-wise energy consumption; residents will be able to consciously avoid unnecessary consumption behavior. However, visualization requires sensors to measure appliance-wise energy consumption and is generally a costly task. In this paper, an unsupervised method for nonintrusive appliance load monitoring based on a semi-binary non-negative matrix factorization model is proposed. This framework utilizes the total power consumption patterns measured at the circuit breaker panel in a house, and derives disaggregated appliance-wise energy consumption. In the proposed approach, the energy consumption of individual appliances is estimated by considering the appliance-specific variances based on an aggregated energy consumption data set. The authors implement the proposed method and evaluate disaggregation accuracy using real world data sets.

Evaluation of annual energy loss reduction based on reconfiguration scheduling

Takenobu, Yuji; Yasuda, Norihito; Yasuda, Norihito; Kawano, Shunsuke; Hayashi, Yasuhiro; Minato, Shin Ichi

IEEE Transactions on Smart Grid PP(99) 2016/01-2016/01

DOIScopus

Detail

ISSN:19493053

Outline:© 2010-2012 IEEE.In distribution network management, switch reconfiguration is an important tool for reducing energy loss. Recently, a variety of annual reconfiguration planning methods considering energy loss have been studied. However, no conventional methods address the reconfiguration periods in fine granularity. Practically, switch durability does not support high-frequency switching. Therefore, this paper proposes a new optimization method for annual reconfiguration scheduling. This method determines switch configurations and their reconfiguration periods with a constraint on the permissible reconfiguration times. In addition, this paper reveals the annual energy loss reduction effect of this optimization. Our method is based on partial network optimization with exhaustive enumeration of all feasible configurations. Experiments were conducted using a standard Japanese distribution network model with 468 switches. The results show that optimizing the reconfiguration periods reduces energy loss by up to 2.1 times, relative to that in a simulated conventional operation, which considers reconfiguration at equal intervals. We believe that this is the first quantitative report to address the difference between optimal reconfiguration scheduling and conventional reconfiguration.

Cooperating Voltage Control Method between Battery Energy Storage System and LRT and SVR for Purpose of Expansion of PV Introduction

Yoshinaga Jun;Akagi Satoru;Ito Masakazu;Hayashi Yasuhiro;Ishibashi Kazunari

The transactions of the Institute of Electrical Engineers of Japan.B 136(3) p.291 - 3012016-2016

CiNii

Detail

ISSN:0385-4213

Outline:Voltage deviation in distribution networks and photovoltaic (PV) output restriction, caused by a large amount of PV systems installation, have been issued recently. BESS (Battery Energy Storage System) is one of the solutions. However, the detailed evaluation of the voltage control effect of BESS has not been carried out, because its effect varies according to BESS placement, its output and configuration of distribution, etc. Therefore, the amount of PV introduction limits in several distribution networks were evaluated and effective BESS arrangement and output control were examined in this paper. The effectiveness of the proposed BESS cooperating voltage control method with LRT, SVR was verified using numerical simulation and experiment of distribution system simulator.

Effectiveness of Improvement of Benefit of the Electric Power Selling Charges and Electricity Charges using Battery Storage System and Heat Pump Water Heater for High Penetration PV

Miyamoto Yusuke;Hayashi Yasuhiro

The transactions of the Institute of Electrical Engineers of Japan.B 136(3) p.245 - 2582016-2016

CiNii

Detail

ISSN:0385-4213

Outline:Recently home energy management system (HEMS) has been spread due to increase in awareness of save energy after Great East Japan Earthquake. HEMS consists of photovoltaic power system (PV), battery energy storage system (BESS) and heat pump water heater (HPWH), etc. Residential PV implementation rate has been increasing due to feed in tariff from 2009. So there is a danger of output suppression loss due to voltage increase on a distribution line due to reverse power flow from each residential PV. So we try to study how to reduce output suppression loss using BESS and HPWH optimally. One of the main purpose to implement BESS and HPWH is for economy using the difference in electricity charges between during nighttime and daytime. So in this research, we optimize how to operate BESS and HPWH to improve the benefit of the electric power selling charges and electricity charges considering reduction of output suppression loss and the difference in electricity charges between during nighttime and daytime.

Voltage Fluctuation Issue on Distribution System at Time of Demand Response and Cooperating Voltage Control Method between Battery Energy Storage System and SVR

Yoshinaga Jun;Akagi Satoru;Ito Masakazu;Hayashi Yasuhiro;Ishibashi Kazunari;Takahasi Naoyuki

The transactions of the Institute of Electrical Engineers of Japan.B 136(4) p.400 - 4092016-2016

CiNii

Detail

ISSN:0385-4213

Outline:Demand response can achieve peak-cut and peak-shift of the electric demand by delivering the load restraint of customers, based on Demand Response (DR) signal sent by an electric power company. However, the demand response restrains the load amount of many consumers simultaneously, so the voltage of the whole distribution system is greatly fluctuated depending on the distribution form such as line length, amount of load restraint, etc. Therefore, we propose the voltage control methods which can avoid voltage deviation in consideration of a time constant of demand response. Furthermore, we propose the BESS cooperating voltage control methods with LRT, SVR and verify the effectiveness using experiment of distribution system simulator.

Robust Operation Planning Method for Integrated Solid Oxide Fuel Cells in a Collective Housing with Electric Power Interchange System Considering Uncertainty in Demand Forecast

Kato Runa;Fujimoto Yu;Hayashi Yasuhiro

The transactions of the Institute of Electrical Engineers of Japan.B 136(6) p.528 - 5362016-2016

CiNii

Detail

ISSN:0385-4213

Outline:The subject of this study is to propose a power interchange system in a collective housing with residential solid oxide fuel cells (SOFCs) and a robust operation planning method for integrated SOFCs against uncertain energy demand forecast. In this method, the future operation plan for multiple SOFCs is optimized and determined to minimize the expected total primary energy consumption in the collective housing considering uncertainty in demand forecast. If the forecast energy demand includes forecast errors, the result of SOFCs operation will corrupt from the viewpoint of the primary energy consumption. Thus, the output decision problem for SOFCs is formulated by considering the corruption caused by forecast errors, so that the decided SOFC outputs have the robustness against uncertainty in demand forecast. The validity of the proposed method is examined based on numerical simulations from the perspective of the robustness.

Versatile Demonstration Platform and its Utilization for Methodology Development in Cooperative Distributed Energy Management System

FUJIMOTO Yu;HAYASHI Yasuhiro

Journal of The Society of Instrument and Control Engineers 55(7) p.592 - 5972016-2016

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Detail

ISSN:0453-4662

DESIGN AND CONSTRUCTION OF ZERO ENERGY HOUSE

NAGASAWA Natsuko;SHIBUTANI Ayane;MATSUNAGA Tomohiro;TANABE Shin-ichi;FURUYA Nobuaki;WATANABE Naoya;HIROHASHI Wataru;HAYASHI Yasuhiro

AIJ Journal of Technology and Design 22(52) p.1049 - 10522016-2016

CiNii

Detail

ISSN:1341-9463

Outline:Waseda University and various enterprises proposed a Zero-Energy-House(ZEH) called “Nobi-Nobi HOUSE” in ENEMANEHOUSE2014. In this ZEH, we carried out a design for the ZEH technology, and was build in Tokyo at January 2014. After the relocated in Shizuoka, it was measured every four seasons in energy consumption, electric-generating capacity and indoor environment. This report shows design of “Nobi-Nobi HOUSE” for ZEH and result of measurement.

Automatic control with ECHONET Lite

Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan 2016(0) p.441 - 4442016-2016

CiNii

Improvement of prediction interval estimation algorithm with just-in-time modeling for PV system operation

Yamazaki, Tomohide; Yamazaki, Tomohide; Wakao, Shinji; Wakao, Shinji; Fujimoto, Yu; Fujimoto, Yu; Hayashi, Yasuhiro; Hayashi, Yasuhiro

2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015 2015/12-2015/12

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Detail

Outline:© 2015 IEEE. Output of the photovoltaic (PV) system drastically fluctuates depending on weather conditions. Therefore users of PV systems should manage their energy usage with forecast information of the PV output. Due to the reasons above, we have developed an estimation method of X% prediction interval of solar irradiance. We have achieved a high-accuracy prediction interval for any prediction coefficient X%. However, we found that there are some errors in a case where the prediction coefficient is high. In this paper, we improve the estimation algorithm of the prediction interval.

Personalized Energy Management Systems for Home Appliances Based on Bayesian Networks

Tomoaki Shoji, Wataru Hirohashi, Yu Fujimoto, Yoshiharu Amano, Shin-ichi Tanabe & Yasuhiro Hayashi

Journal of International Council on Electrical Engineering 2015/11-

Islanding operation methods integrated with multiple power supplies and HEMS

Yoshinaga, Jun; Hirohashi, Wataru; Hayashi, Yasuhiro; Isoe, Yasuhito; Miyake, Jiro; Tsuchiya, Shizuo; Wada, Mikihiko

Proceedings - 2015 International Symposium on Smart Electric Distribution Systems and Technologies, EDST 2015 p.436 - 4412015/11-2015/11

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Outline:© 2015 IEEE. This paper investigates the operation of various possible standalone power supply configurations for smart houses with a view to preventing inconvenience to residents when blackouts occur. In smart houses, various types of power-generation equipment (such as photovoltaic (PV), battery energy storage system (BESS), electric vehicle (EV), and fuel cell (FC) systems) with different output power, capacity, and response time characteristics are used. Our results indicate that combined use of these equipment and home energy management system (HEMS) control provide the best means of enabling residents to effectively use household appliances even in limited power supply situations.

Personalized Energy Management System for Home Appliances Based on Bayesian Networks

Tomoaki Shoji, Wataru Hirohashi, Yu Fujimoto, Yoshiharu Amano, Shin-ichi Tanabe, Yasuhiro Hayashi

Journal of International Council on Electrical Engineering, Vol.5, No.1 5(1) 2015/11-2015/11

Dynamic Updating Method of Optimal Control Parameters of Multiple Advanced SVRs in a Single Feeder

Yoshizawa Shinya;Yamamoto Yuya;Hayashi Yasuhiro;Sasaki Shunsuke;Shigeto Takaya;Nomura Hideo

IEEJ Transactions on Power and Energy 135(9) p.550 - 5582015/09-

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ISSN:0385-4213

Outline:This paper proposes a dynamic updating method of the optimal control parameters of multiple advanced step voltage regulators (SVRs) in a single feeder considering a massive introduction of photovoltaic (PV) systems. Each advanced SVR can adjust their tap position according to the updated control parameters in a certain period. The main feature of the proposed method is that the optimal parameters which minimize the voltage violation amount from the proper range and the tap operation count of SVR are determined quickly based on greedy algorithm. A numerical simulation is carried out on an actual distribution system model with the measured PV and load data so that the effectiveness of the proposed method can be evaluated.

41083 Collaboration Control of Window System and Air-Conditioner in Consideration of Thermal Comfort and Energy Saving : Part3: A Validity Evaluation of Indoor Temperature Change Calculation Model

Ebe Marina;Takenaka Takeshi

Summaries of technical papers of annual meeting 2015(0) p.175 - 1762015/09-2015/09

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ISSN:18839363

OLTC and multiple SVRs in distribution system by using database

Kawano, Shunsuke; Yoshizawa, Shinya; Fujimoto, Yu; Hayashi, Yasuhiro

IYCE 2015 - Proceedings: 2015 5th International Youth Conference on Energy 2015/08-2015/08

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Outline:© 2015 IEEE. This paper presents a new method for determining the load drop compensator (LDC) parameters of On-load tap changer (OLTC) and step voltage regulators (SVRs) in the distribution system. Introduction of photovoltaic generation systems (PVs) into a distribution system makes determining the appropriate LDC parameters difficult, which may cause voltage deviation because reverse power flow from PVs affects voltage. Especially in the distribution system in which multiple SVRs are installed, determining the appropriate combination of LDC parameters becomes difficult. In the proposed method, the parameters are reset every hour by choosing one LDC parameter from a database including feasible parameters in the past. To create the database, the proposed method hourly enumerates the feasible parameters utilizing data acquired by SCADA. To evaluate the performance of the proposed method, the amount of voltage deviation of the proposed method will be compared with that of a centralized control method.

Distribution automation system for service restoration involving simultaneous disconnection and reconnection of distributed generators

Kawano, Shunsuke; Fujimoto, Yu; Wakao, Shinji; Hayashi, Yasuhiro; Irie, Hitoshi; Takenaka, Hideaki; Nakajima, Takashi Y.

2015 IEEE Eindhoven PowerTech, PowerTech 2015 2015/08-2015/08

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Outline:© 2015 IEEE. This paper presents a distribution automation system (DAS) for service restoration in the distribution network with photovoltaic (PV) generator systems, which are disconnected simultaneously after a fault and subsequently reconnected after service restoration. Because the reverse power flow of PVs affects voltage in the distribution system, voltage dips and surges occur during the service restoration. However, current DAS do not control voltage regulators such as an on-load tap changer (OLTC) and step voltage regulators (SVRs) during the service restoration. The proposed DAS estimates the voltage in a distribution network considering the simultaneous disconnection of PVs by performing power flow calculations, and it controls the tap position of OLTC and/or SVRs according to the predicted voltage deviation. The voltage after the disconnection of PVs is calculated by estimating the PV output utilizing square kilometer solar radiation data calculated using satellite image data in real time.

Dynamic voltage regulator operation with demand side management for voltage control

Mufaris, A. L M; Baba, J.; Yoshizawa, S.; Hayashi, Y.

2015 IEEE Eindhoven PowerTech, PowerTech 2015 2015/08-2015/08

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Outline:© 2015 IEEE. Widespread interconnection of Photovoltaic (PV) systems in the distribution system may create voltage rise problem. In this paper, a decentralized voltage control method by use of voltage regulators (VRs) and demand side management using consumer controllable load has been proposed for voltage rise compensation. The proposed method includes a novel determination method to find dynamic line drop compensation (LDC) parameters for a VR that has reverse power flow using the measured line current through VR and an optimal method that determines a dead band for a VR in order to lessens the number of tap operations while minimizing voltage deviation and violation. The obtained results show that voltage violation is extensively mitigated by the proposed method and no significant increment in tap operations of VR is encountered.

Method for Rapidly Determining Line Drop Compensator Parameters of Low-Voltage Regulator using Classifiers

Kikusato Hiroshi;Takahashi Naoyuki;Yoshinaga Jun;Fujimoto Yu;Hayashi Yasuhiro;Kusagawa Shinichi;Motegi Noriyuki

IEEJ Transactions on Power and Energy 135(7) p.446 - 4532015/07-

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ISSN:0385-4213

Outline:Compensating the voltage within the appropriate range becomes difficult when a large number of photovoltaic (PV) systems are installed. As a solution to this problem, the installation of a low-voltage regulator (LVR) has been studied. In this paper, we propose a method for rapidly and accurately determining the line drop compensator method (LDC) parameters as a part of a voltage management scheme, which consists of prediction, operation, and control. In the proposed method, candidates of the appropriate LDC parameters are selected with low computational cost by using classifiers that learns the relation between power series data and the properness of LDC parameters. We performed numerical simulations to evaluate the validity from the viewpoints of computational time and classification accuracy for determination of the LDC parameters, and verified the voltage control performance of the proposed method.

Prevention of Output Suppression through Heat Pump Water Heaters for High-penetration Residential PV Systems for Long-term Operation

Miyamoto Yusuke;Hayashi Yasuhiro

IEEJ Transactions on Power and Energy 135(7) p.423 - 4362015/07-

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Outline:There is a danger of output suppression of high-penetration residential PV systems due to voltage increase. It is necessary to install new technology to prevent the occurrence of such phenomenon. Therefore, we focused our attention on heat pump water heaters (HPWHs). HPWHs are usually used to heat water during night time because electricity prices are cheaper than during the daytime for the load leveling in Japan. So they can be used as a countermeasure without additional cost if they are operated during the daytime. However, HPWHs do not have sufficient capacity to absorb inverse energy at each residence. Thus HPWH operation must be optimized to minimize output suppression loss. In this research, we selected four typical sunny days in spring, summer, autumn and winter. The optimal HPWH operation was calculated by numerical simulation. The optimal monthly HPWH operation was investigated using the weather forecast assuming actual operation in each season.

Estimation Method of Prediction Interval of Solar Irradiance Based on Just-In-Time Modeling for Photovoltaic Output Prediction

Yamazaki Tomohide;Homma Hayato;Wakao Shinji;Fujimoto Yu;Hayashi Yasuhiro

IEEJ Transactions on Power and Energy 135(3) p.160 - 1672015/03-

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ISSN:0385-4213

Outline:PV system recently attracts much attention on the back of environmental problems, antinuclear power movements and energy problems. Therefore, a large scale introduction of PV system is expected in the near future. On the other hand, a lot of PV systems connected to the power system bring on some problems. For example, a system voltage often drifts from the norm when the reverse power flow increase. Accordingly, it is necessary to perform an optimal system operation in order to utilize a solar energy to the maximum by installing energy buffers, e. g. storage batteries. Especially, the forecast information i.e., the reliability as well as predicted solar irradiance is essential for the effective operation. In this paper, we propose a way to estimate the prediction interval of the solar irradiance as an index of reliability by using Just-In-Time Modeling (JIT Modeling). We consider the accuracy of the prediction interval under many conditions and derive the high-precision estimation method. In addition, we also talk about the future outlook of this study.

Distribution Network Verification for Secure Restoration by Enumerating All Critical Failures

Takeru Inoue, Norihito Yasuda, Shunsuke Kawano, Yuji Takenobu, Shin-ichi Minato, and Yasuhiro Hayashi

IEEE TRANSACTIONS ON SMART GRID 6(2) p.843 - 8522015/03-

Coordinated BESS and LRT Control for Voltage Stabilization of a PV-Supplied Microgrid

Khoa Le Dinh, Yasuhiro Hayashi

IEEJ Transactions on Power and Energy 134(10) p.875 - 8842014/10-

Determination Method of Operation Plan for Fuel Cells in Collective Housing with Electric Power Interchange System

Kameda Manato;Fujimoto Yu;Hayashi Yasuhiro

IEEJ Transactions on Power and Energy 134(8) p.682 - 6912014/08-

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Outline:In this paper, the authors propose an electric power interchange system in collective housing with fuel cells (FCs) and a determination method of operation plan for FCs in the collective housing. In the method, the operation plan for FCs is determined from an evaluation point, primary energy consumption of all houses in the collective housing, based on an enumeration method and particle swarm optimization (PSO) which is one of non-liner optimization methods. In order to examine the validity of the determination method, numerical simulations are carried out for the collective housing model, primary energy consumptions of the model are compared to those of a standard system (without FCs), and the reduction effects are evaluated taking uncertainty into consideration by using 10,000 demand patterns which are represented by 40 observational demand data based on the bootstrap method. In addition, the reduction effects by reducing introduced FCs by half are also evaluated from the point of primary energy consumptions, operating efficiency and running efficiency.

Evaluation of CO2 Reduction and Primary Energy Savings for Collective Housing with Fuel Cells Considering Variability in Demand

KAMEDA, Manato, FUJIMOTO, Yu and HAYASHI, Yasuhiro

Journal of Energy and Power Engineering 8(2) p.274 - 2812014/02-

A Study on Accuracy of Fault Locator in Distribution System with Distributed Generations

IIOKA Daisuke;HAYASHI Yasuhiro

IEEJ Transactions on Power and Energy 133(6) p.515 - 5222013/06-

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Outline:A fault locator system in a loop-shaped distribution system with inverter based distributed generations is proposed. An algorithm of proposed fault locator system is based on the impedance obtained by the phase-voltage and line-current at the transformer feeder in the power distribution substation. We have proposed the quadratic equation expressed in terms of fault location. The quadratic equation represents the impedance from the substation to the fault location. Inserting the impedance obtained by the voltage and current at the transformer feeder into the quadratic equation, two candidates of the fault location are obtained. We can select the true fault location from the two candidates by using the characteristics of impedance calculated by the voltage and current at the incoming feeder of distributed generation. The validity of the fault locator system was investigated by PSCAD/EMTDC simulations. As a result, it was found that impedance obtained by the information of the substation and distributed generations are useful for searching the fault location in the loop-shaped distribution system.

Evaluation of Voltage Control Effect of Acquisition Period for IT Switch Data

UDAGAWA Tsuyoshi;HAYASHI Yasuhiro;TAKAHASHI Naoyuki;MATSUURA Yasuo;MORITA Tomohiko;MINAMI Masahiro

IEEJ Transactions on Power and Energy 133(4) p.324 - 3322013/04-

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Outline:Measured data from IT switches are utilized in order to control voltage in distribution systems with photovoltaic generation systems. However, length of period from the data measurement to the data acquisition from IT switches affects voltage control ability in the distribution automation system. In this paper, a voltage control method by LRT and SVR with the periodic data from IT switches is proposed, and using the method, the effect of the length of the data acquisition period for voltage control is evaluated through numerical simulations in a distribution system model. Furthermore, the optimal length of the data acquisition period is determined according to PV penetration rate.

Cooperation Voltage Control Method of LRT and SVR in Distribution System with PV Systems Corresponding to Bank Fault Restoration

YOSHIZAWA Shinya;HAYASHI Yasuhiro;TSUJI Masaki;KAMIYA Eiji

IEEJ Transactions on Power and Energy 133(4) p.333 - 3422013/04-

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Outline:Voltages in distribution system are maintained within a proper voltage range by adjusting a tap position of Load Ratio control Transformer (LRT) and Step Voltage Regulator (SVR). In Japan, many voltage control methods have been researched. However, these conventional methods do not presuppose the bank fault restoration. Since the main purpose of voltage control of the conventional restoration approach is to reduce the amount of voltage violation in distribution system, the number of customers with voltage violation cannot be reduced to zero during a bank fault restoration. In this paper, the authors propose a cooperation voltage control method of LRT and SVR to minimize the number of customers with voltage violation corresponding to the bank fault restoration in distribution systems with PV systems. In the proposed method, the tap position of SVR is controlled after the control of LRT to avoid frequent tap changes and each tap position of voltage control devices is controlled to minimize the number of customers with voltage violation. In order to check the effectiveness of the proposed method, the simulation using distribution system model with PV systems is performed under various conditions.

Development and Evaluation of a Fast Voltage Calculation Method for Low-Voltage Distribution System

KAWANO Shunsuke;HAYASHI Yasuhiro;ITAYA Nobuhiko;TAKANO Tomihiro;ONO Tetsufumi

IEEJ Transactions on Power and Energy 133(4) p.343 - 3492013/04-

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Outline:Since residential photovoltaic systems trend to increase in low-voltage distribution feeders, it is becoming more important to estimate voltage profile including not only high and middle but low-voltage distribution network to operate distribution systems. In case of using the conventional power flow calculation method based on iterative calculation, it will be taken much time to get voltage values all over low-voltage distribution feeders. This paper presents a new method to calculate voltage quickly keeping the accuracy sufficient for practical operation. In order to check the validity of the proposed method, numerical results are shown by comparing its computation accuracy and time with those of the conventional one.

Transmission and Distribution Losses Minimization using Hierarchy Control Method of Transmission System Circuit Breakers and Distribution System Switches for Various PV Penetration Cases

WATANABE Takayuki;HAYASHI Yasuhiro

IEEJ Transactions on Power and Energy 133(4) p.383 - 3952013/04-

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Outline:Distribution system has huge number of configuration candidates because the network configuration is determined by state of many sectionalizing switches (SW: opened or closed) installed in terms of keeping power quality, reliability and so on. Transmission system also has huge number of configuration candidates and circuit breakers (CB: opened or closed) as same objective as distribution system. Since feeder current and voltage depend on the network configuration, losses of transmission and distribution systems can be reduced by controlling states of CB and SW. So far, various methods to determine the loss minimum configuration of transmission and distribution systems have been researched. However, a method that hierarchically determines the loss minimum configuration of transmission and distribution system with PV has not been proposed. In addition, power flow of whole system is changed by various PV penetration distribution patterns. Therefore, transmission and distribution losses must be evaluated in various PV penetration cases.In this paper, a hierarchy control method to determine a transmission and distribution loss minimum network configuration by controlling on-off states of CB and SW is proposed. The validity of the proposed method is evaluated to calculate the reduction of whole network loss in a transmission and distribution model with 48 CB and 1404 SW in two kinds of PV penetration cases.

Proposal of Dynamic Voltage Control using SVC with Variable Dead Band in Distribution System

TAKAHASHI Naoyuki;HAYASHI Yasuhiro

IEEJ Transactions on Power and Energy 133(4) p.396 - 4032013/04-

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ISSN:03854213

Outline:This paper describes dynamic voltage control method using SVC with controllable dead band that changes dynamically to a node voltage in a distribution system installed SVC. Proposed method consists of three systems. First system detects probability of voltage deviation from proper range of node voltage. Second system is used to stabilize output of SVC based on changing dead band. Third system expect voltage trend. In order to verify the validity of the proposed method in comparison with conventional methods, numerical simulation and experiment were carried out using a distribution system model with RES.

Verification of Reduction Effect on Output Suppression through Storage Battery in Residential Area with Clustered PV Systems

T. Fujimori, Y.Miyamoto, Y. Hayashi

Journal of International Council on Electrical Engineering 2(4) p.377 - 3832012/10-

Cooperative Voltage Control Method by Power Factor Control of PV Systems and LRT

KAWASAKI Shoji;KANEMOTO Noriaki;TAOKA Hisao;MATSUKI Junya;HAYASHI Yasuhiro

IEEJ Transactions on Power and Energy 132(4) p.309 - 3162012/04-

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ISSN:03854213

Outline:Recently, the number of system interconnection of the renewable energy sources (RES) such as the photovoltaic generation (PV) and wind power generation is increasing drastically, and there is in danger of changing the voltages in a distribution system by the precipitous output variation of RESs. In this study, the authors propose one voltage control method of the distribution system by the power factor control of plural PV systems in consideration of cooperation with the load ratio control transformer (LRT) of laggard control response installed beforehand in the distribution system. In the proposed method, the slow voltage variation is controlled by LRT, and the steep voltage variation uncontrollable by LRT is controlled by plural PV systems, as a result, all the node voltages are controllable within the proper limits. In order to verify the validity of the proposed method, the numerical calculations are carried out by using an analytical model of distribution system which interconnected PV systems.

Experimental Analysis on Influences of Harmonic Voltage at High- Voltage Network on Harmonic Current at Medium-Voltage Network

J. Inagaki, Y. Hayashi, Y. Tada

Journal of International Council on Electrical Engineering 2(2) p.146 - 1522012/04-

Method of Optimal Allocation of SVR in Distribution Feeders with Renewable Energy Sources

S. Takahashi, Y. Hayashi, Y. Tsuji, E. Kamiya

Journal of International Council on Electrical Engineering 2(2) p.159 - 1652012/04-

Restraint Method of Voltage Total Harmonic Distortion in Distribution Network by Power Conditioner Systems using Measured Data from IT Switches

Shoji Kawasaki, Kazuki Shimoda, Motohiro Tanaka, Hisao Taoka, Junya Matsuki, Yasuhiro Hayashi

IEEJ Transactions on Power and Energy 131(12) p.936 - 9442011/12-

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Outline:Recently, the amount of distributed generation (DG) such as photovoltaic system and wind power generator system installed in a distribution system has been increasing because of reduction of the effects on the environment. However, the harmonic troubles in the distribution system are apprehended in the background of the increase of connection of DGs through the inverters and the spread of power electronics equipment. In this paper, the authors propose a restraint method of voltage total harmonic distortion (THD) in a whole distribution network by active filter (AF) operation of plural power conditioner systems (PCS). Moreover, the authors propose a determination method of the optimal gain of AF operation so as to minimize the maximum value of voltage THD in the distribution network by the real-time feedback control with measured data from the information technology (IT) switches. In order to verify the validity of the proposed method, the numerical calculations are carried out by using an analytical model of distribution network interconnected DGs with PCS.

Improvement of Three-phase Unbalance due to Connection of Dispersed Generator by Damper Windings of Synchronous Generator

MATSUKI Junya;TAOKA Hisao;HAYASHI Yasuhiro;IWAMOTO Shigeru;DAIKOKU Akihiro

IEEJ Transactions on Power and Energy 131(9) p.724 - 7292011/09-

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Outline:It is well known in the numerical simulation of synchronous generator that the damper winding contributes to suppress the three-phase circuit unbalance in power systems. However, experimental study has not been performed yet. In this paper, authors verify experimentally the suppression of the three-phase unbalance by the damper windings. In order to simulate the three-phase unbalance, a 470W dispersed generator of single-phase-two-line type is connected to a three-phase laboratory-scale power system that includes a 6kVA synchronous generator. Authors measured and analyzed line voltages and currents as well as damper bar currents both with and without dispersed generator. The influence of damper windings to the unbalance of three-phase circuit is also investigated. The results show that the damper winding contributes to improve the three-phase unbalance.

Dynamic Load Model using PSO-Based Parameter Estimation

TAOKA Hisao;MATSUKI Junya;TOMODA Michiya;HAYASHI Yasuhiro;YAMAGISHI Yoshio;KANAO Norikazu

131(7) p.557 - 5662011/07-

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Verification of Effect of Damper Windings on the Transient Condition of Synchronous Generator

MATSUKI Junya;TAOKA Hisao;HAYASHI Yasuhiro;IWAMOTO Shigeru;DAIKOKU Akihiro

IEEJ Transactions on Power and Energy 131(5) p.447 - 4542011/05-

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Outline:This paper describes the results of experimental investigation on the effects of damper winding of a 4-pole synchronous generator at the synchronous generator transient. It is known in the simulation that the damper winding acts effectively at the synchronous generator transient condition. However, experimental proof has not been performed yet. Then, experiments on damper effects were conducted in this paper using a laboratory-scale power system. The damper winding of tested generator consists of 5 damper bars each pole and the number of working damper bars can be changed manually. Damper currents at each bar were measured by a Rogowski coil. FFT analysis was applied to both damper currents and armature currents under different operating conditions. Relationships between damper currents in the rotor and armature currents in the stator were made clearer than before.

Parameter Estimation of Dynamic Load Model in Power System by using Measured Data

Yasuhiro Hayashi,Michiya Tomoda,Junya Matsuki

Journal of International Council on Electrical Engineering 1(2) p.200 - 2062011/04-

Load Management using Heat-Pump Water Heater and Electric Vehicle Battery Charger in Distribution System with PV

Yasuhiro Hayashi,Yuji Hanai, Kazuaki Yoshimura , Junya Matsuki

Journal of International Council on Electrical Engineering 1(2) p.207 - 2132011/04-

Restraint of Harmonics in Distribution System by Cooperative Control of PV Systems-

TANAKA Motohiro;KAWASAKI Shoji;TAOKA Hisao;MATSUKI Junya;HAYASHI Yasuhiro

2011(49) p.19 - 242011/03-

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Restraint of Harmonics in Distribution System by Cooperative Control of PV Systems-

TANAKA Motohiro;KAWASAKI Shoji;TAOKA Hisao;MATSUKI Junya;HAYASHI Yasuhiro

2011(86) p.19 - 242011/03-

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A Determination Method of the Restoration Configuration Considering Many Connections of Distributed Generators

TAKANO Hirotaka;HAYASHI Yasuhiro;MATSUKI Junya;SUGAYA Shuhei

IEEJ Transactions on Power and Energy 131(2) p.187 - 1952011/02-2011/02

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Outline:In the field of electrical power system, various approaches, such as utilization of renewable energy, loss reduction, and so on, have been taken to reduce CO2 emission. So as to work toward this goal, the total number of distributed generators (DGs) using renewable energy connected into 6.6kV distribution system has been increasing rapidly. However, when a fault occurs such as distribution line faults and bank faults, DGs connecting outage sections are disconnected simultaneously. Since the output of DGs influences feeder current and node voltage of distribution system, it is necessary to determine the optimal system configuration considering simultaneous disconnection and reconnection of DGs.In this paper, the authors propose a computation method to determine the optimal restoration configuration considering many connections of DGs. The feature of determined restoration configurations is prevention of the violation of operational constraints by disconnection and reconnection of DGs. Numerical simulations are carried out for a real scale distribution system model with 4 distribution substations, 72 distribution feeders, 252 sectionalizing switches (configuration candidates are 2252) and 23.2MW DGs (which is 14% of total load) in order to examine the validity of the proposed algorithm.

Survey of Smart Grid

HAYASHI Yasuhiro

Energy and resources 32(1) p.22 - 262011/01-2011/01

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ISSN:02850494

LRTとの制御分担を考慮したSVCの協調型電圧制御法およびSVCの定格容量と制御パラメータの決定手法

川﨑章司,林 泰弘,松木純也,山口益弘

電気学会論文誌B(電力・エネルギー部門誌) Vol. 130(No. 11) p.963 - 9712010/11-

再生可能エネルギー電源が連系された配電系統のループ化と集中型電圧制御の適用効果の実験的検証

花井悠二,林 泰弘,松木純也

電気学会論文誌B(電力・エネルギー部門誌) Vol. 130(No. 11) p.932 - 9402010/11-

総論・スマートグリッド技術の動向と展開

林泰弘

電気評論 2010(11) p.18 - 232010/11-

Japanese Trend of Advanced Smart Grid Technology for Harmonization of Renewable Energy Resources and Power Systems

HAYASHI Yasuhiro

IEEJ Transactions on Power and Energy 130(11) p.928 - 9312010/11-2010/11

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Outline:In tandem with the penetration of Renewable Energy Sources (RES) such as photovoltaic and wind power generation to reduce CO2 emissions and conserve energy, development of advanced smart grid technologies is needed to secure a stable power supply of grid with RES by controlling power quality (voltage and frequency) within each secure range. This paper describes Japanese trend of the advanced smart grid technologies to harmonize RES and conventional bulk power system. Furthermore, several ongoing field tests to try to realize Japanese version of smart grid are briefly introduced.

Experimental Verification of Application of Looped System and Centralized Voltage Control in a Distribution System with Renewable Energy Sources

HANAI Yuji;HAYASHI Yasuhiro;MATSUKI Junya

IEEJ Transactions on Power and Energy 130(11) p.932 - 9402010/11-2010/11

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Outline:The line voltage control in a distribution network is one of the most important issues for a penetration of Renewable Energy Sources (RES). A loop distribution network configuration is an effective solution to resolve voltage and distribution loss issues concerned about a penetration of RES. In this paper, for a loop distribution network, the authors propose a voltage control method based on tap change control of LRT and active/reactive power control of RES. The tap change control of LRT takes a major role of the proposed voltage control. Additionally the active/reactive power control of RES supports the voltage control when voltage deviation from the upper or lower voltage limit is unavoidable. The proposed method adopts SCADA system based on measured data from IT switches, which are sectionalizing switch with sensor installed in distribution feeder. In order to check the validity of the proposed voltage control method, experimental simulations using a distribution system analog simulator "ANSWER" are carried out. In the simulations, the voltage maintenance capability in the normal and the emergency is evaluated.

Voltage Control Method by SVC in Consideration of Cooperative Control with LRT and Determination Method for Rated Capacity and Control Parameters of SVC

KAWASAKI Shoji;HAYASHI Yasuhiro;MATSUKI Junya;YAMAGUCHI Masuhiro

IEEJ Transactions on Power and Energy 130(11) p.963 - 9712010/11-2010/11

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Outline:In recent years, the number of connection of distributed generators (DGs) such as the photovoltaic generation (PV) and wind power generation is increasing, and there is in danger of changing the voltages in a distribution system by the precipitous output variation of DGs. In this study, the authors propose one voltage control method of a distribution system by the static var compensator (SVC) in consideration of cooperation with the load ratio control transformer (LRT) of laggard control response installed beforehand in the distribution system. The proposed method may be able to make the rated capacity of SVC small and may be able to reduce the aggravation of power factor of the distribution system, by setting up the dead band of voltage control appropriately. And the authors propose one determination method of the necessary minimum rated capacity and optimum control parameters of SVC in view of the cost of equipment and high-speed controllability. In order to verify the validity of the proposed method, the numerical calculations are carried out by using a distribution system model.

Restraint Method of Voltage Total Harmonic Distortion in Distribution System by Power Conditioner Systems Using Measured Data from IT Switches

S. Kawasaki, J. Matsuki, and Y. Hayashi

The 9th International Power and Energy Conference (IPEC2010) 2010/10-

センサ開閉器から得られる計測情報を活用した配電系統の電圧推定・制御手法の提案実験的検証

花井 悠二, 林 泰弘, 松木 純也, 栗原 雅典

電気学会論文誌B(電力・エネルギー部門誌) Vol. 130(No. 10) p.859 - 8692010/10-

Proposal and Experimental Verification of Distribution Voltage Estimation and Control Method using Measured Data from IT Switches

HANAI Yuji, HAYASHI Yasuhiro, MATSUKI Junya, KURIHARA Masanori

IEEJ Transactions on Power and Energy 130(10) p.859 - 8692010/10-2010/10

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Outline:This paper describes distribution voltage estimation and a control method using measured data from sectionalizing switches with sensors which are called IT switch. The voltage estimation is based on Particle Swarm Optimization (PSO) and all distribution line voltages are estimated by minimizing the weighted sum of voltage and current error at IT switch. The voltage control maintains all the estimated node voltages within the proper range by changing tap of a LRT in a distribution substation. In order to check the validity of the proposed method, numerical and experimental simulations are carried out on a distribution system model.

解説・スマートグリッドの国内動向

林泰弘

低温工学会報 vol.45(No.9) p.410 - 4162010/09-

Restraint Method of Voltage Total Harmonic Distortion in Distribution Network by Power Conditioner System Using Measured Data from IT Switches

KAWASAKI Shoji;SHIMODA Kazuki;MATSUKI Junya;HAYASHI Yasuhiro

2010(46) p.115 - 1202010/09-2010/09

CiNii

Evaluation of setting value of operating parameter of voltage increase suppression to maximize output suppression avoidance for clustered residential grid-interconnected photovoltaic power systems

MIYAMOTO Yusuke;HAYASHI Yasuhiro

2010(76) p.123 - 1312010/09-2010/09

CiNii

Evaluation of Stabilizing Control by Cooperation of Binary Control and Electrical Charge and Discharge Control Using Storage Battery in PV Systems

MURAHASHI Keisuke;HAYASHI Yasuhiro;HAYASHI Takanori;OKUNO Yoshimichi;FUNABASHI Toshihisa

2010(76) p.133 - 1372010/09-2010/09

CiNii

Central Voltage Control Method by LRT and SVR Based on Voltage Estimation Using Measurement Data from IT Switches in Multiple Feeders

TAKAHASHI Shuhei;HAYASHI Yasuhiro

2010(46) p.139 - 1432010/09-2010/09

CiNii

Voltage control using SVCs with controllable dead band in distribution system connected with many PVs

TAKAHASHI Naoyuki;HAYASHI Yasuhiro;MORI Kenjiro

2010(45) p.151 - 1562010/09-2010/09

CiNii

Fault Locator Using Measured Impedance Calculated by Voltage and Current at Incoming Feeder of Distributed Generation System

IIOKA Daisuke;HAYASHI Yasuhiro

2010(52) p.1 - 62010/09-2010/09

CiNii

Impact Assessment Single-phase PV Penetration on Power Quality of Distribution System

HANAI Yuji;MATSUKI Junya;SANO Masahiro;HAYASHI Yasuhiro

2010(76) p.1 - 62010/09-2010/09

CiNii

Minimization Method of Voltage Deviation Region in Distribution System with PV Systems during Bank Fault Restoration

YOSHIZAWA Shinya;HAYASHI Yasuhiro;MORI Kenjiro;KAMIYA Eiji

2010(45) p.145 - 1492010/09-2010/09

CiNii

Minimization Method of Voltage Deviation Region in Distribution System with PV Systems during Bank Fault Restoration

YOSHIZAWA Shinya;HAYASHI Yasuhiro;MORI Kenjiro;KAMIYA Eiji

2010(46) p.145 - 1492010/09-2010/09

CiNii

Fault Locator Using Measured Impedance Calculated by Voltage and Current at Incoming Feeder of Distributed Generation System

IIOKA Daisuke;HAYASHI Yasuhiro

2010(53) p.1 - 62010/09-2010/09

CiNii

Impact Assessment of Single-phase PV Penetration on Power Quality of Distribution System

HANAI Yuji;MATSUKI Junya;SANO Masahiro;HAYASHI Yasuhiro

2010(77) p.1 - 62010/09-2010/09

CiNii

Cooperative Voltage Control Method by LRT and Power Factor Control of PV Systems

KANEMOTO Noriaki;KAWASAKI Shoji;MATSUKI Junya;HAYASHI Yasuhiro

2010(77) p.7 - 122010/09-2010/09

CiNii

Study on Reactive Power Control by Using Fuel Cells to Improve Voltage Rise and Voltage Imbalance under High Penetration of Photovoltaic Generations

SANO Masahiro;HANAI Yuji;HAYASHI Yasuhiro;SHINJI Takao;TSUJITA Shinsuke

2010(77) p.19 - 232010/09-2010/09

CiNii

Optimal Allocation of plural SVCs based on introduction of mass PV

KONISHI Keisuke;HAYASHI Yasuhiro

2010(77) p.25 - 282010/09-2010/09

CiNii

Evaluation of setting value of operating parameter of voltage increase suppression to maximize output suppression avoidance for clustered residential grid-interconnected photovoltaic power systems

MIYAMOTO Yusuke;HAYASHI Yasuhiro

2010(77) p.123 - 1312010/09-2010/09

CiNii

Evaluation of Stabilizing Control by Cooperation of Binary Control and Electrical Charge and Discharge Control Using Storage Battery in PV Systems

MURAHASHI Keisuke;HAYASHI Yasuhiro;HAYASHI Takanori;OKUNO Yoshimichi;FUNABASHI Toshihisa

2010(77) p.133 - 1372010/09-2010/09

CiNii

Research about Compensation of PV Output Fluctuation Using Cooperative Control of PV Systems and multiple GEs

HOSHINA Shunichiro;HAYASHI Yasuhiro

2010(77) p.139 - 1422010/09-2010/09

CiNii

Evaluation of a Load Management Method for a Distribution System using Smart Houses

YOSHIMURA Kazuaki;HANAI Yuji;MATSUKI Junya;HAYASHI Yasuhiro

2010(77) p.149 - 1542010/09-2010/09

CiNii

Improvement of Voltage Imbalance and Restraint of Harmonics in Distribution System by PCS

KAWASAKI Shoji;MATSUKI Junya;TANAKA Motohiro;HAYASHI Yasuhiro

2010(77) p.155 - 1602010/09-2010/09

CiNii

Dynamic Load Model using PSO-Based Parameter Estimation

TAOKA Hisao;MATSUKI Junya;TOMODA Michiya;HAYASHI Yasuhiro;KANAO Norikazu;YAMAGISHI Yoshio

2010(110) p.91 - 962010/09-2010/09

CiNii

Outputs Dispatch of Generators aiming Transmission Congestion Management at the Point of Frequency Fluctuation Caused by Renewable Energy

SUZUKI Hiroaki;HAYASHI Yasuhiro;KOSHIMIZU Gentaro

2010(126) p.19 - 222010/09-2010/09

CiNii

A Study on Determination of Connection Areas of PVs for Centralized Control

NAGATA Kouichi;HANAI Yuji;MATSUKI Junya;HAYASHI Yasuhiro

2010(149) p.55 - 602010/09-2010/09

CiNii

Smart Grid Trend in Japan

HAYASHI Yasuhiro

Journal of the Cryogenic Society of Japan 45(9) p.410 - 4162010/09-2010/09

CiNii

Detail

ISSN:03892441

A Study of the Optimal Configuration of Distribution Network with Distributed Generators

TAKANO Hirotaka;SUGAYA Shuhei;HAYASHI Yasuhiro;MATUSKI Junya;MAKI Yukino

2010(45) p.83 - 882010/09-2010/09

CiNii

Restraint Method of Voltage Total Harmonic Distortion in Distribution Network by Power Conditioner System Using Measured Data from IT Switches

KAWASAKI Shoji;SHIMODA Kazuki;MATSUKI Junya;HAYASHI Yasuhiro

2010(45) p.115 - 1202010/09-2010/09

CiNii

Central Voltage Control Method by LRT and SVR Based on Voltage Estimation Using Measurement Data from IT Switches in Multiple Feeders

TAKAHASHI Shuhei;HAYASHI Yasuhiro

2010(45) p.139 - 1432010/09-2010/09

CiNii

Cooperative Voltage Control Method by LRT and Power Factor Control of PV Systems

KANEMOTO Noriaki;KAWASAKI Shoji;MATSUKI Junya;HAYASHI Yasuhiro

2010(76) p.7 - 122010/09-2010/09

CiNii

Study on Reactive Power Control by Using Fuel Cells to Improve Voltage Rise and Voltage Imbalance under High Penetration of Photovoltaic Generations

SANO Masahiro;HANAI Yuji;HAYASHI Yasuhiro;SHINJI Takao;TSUJITA Shinsuke

2010(76) p.19 - 232010/09-2010/09

CiNii

Optimal Allocation of plural SVCs based on introduction of mass PV

KONISHI Keisuke;HAYASHI Yasuhiro

2010(76) p.25 - 282010/09-2010/09

CiNii

Research about Compensation of PV Output Fluctuation Using Cooperative Control of PV Systems and multiple GEs

HOSHINA Shunichiro;HAYASHI Yasuhiro

2010(76) p.139 - 1422010/09-2010/09

CiNii

Evaluation of a Load Management Method for a Distribution System using Smart Houses

YOSHIMURA Kazuaki;HANAI Yuji;MATSUKI Junya;HAYASHI Yasuhiro

2010(76) p.149 - 1542010/09-2010/09

CiNii

Improvement of Voltage Imbalance and Restraint of Harmonics in Distribution System by PCS

KAWASAKI Shoji;MATSUKI Junya;TANAKA Motohiro;HAYASHI Yasuhiro

2010(76) p.155 - 1602010/09-2010/09

CiNii

Dynamic Load Model using PSO-Based Parameter Estimation

TAOKA Hisao;MATSUKI Junya;TOMODA Michiya;HAYASHI Yasuhiro;KANAO Norikazu;YAMAGISHI Yoshio

2010(109) p.91 - 962010/09-2010/09

CiNii

Outputs Dispatch of Generators aiming Transmission Congestion Management at the Point of Frequency Fluctuation Caused by Renewable Energy

SUZUKI Hiroaki;HAYASHI Yasuhiro;KOSHIMIZU Gentaro

2010(125) p.19 - 222010/09-2010/09

CiNii

A Study on Determination of Connection Areas of PVs for Centralized Control

NAGATA Kouichi;HANAI Yuji;MATSUKI Junya;HAYASHI Yasuhiro

2010(148) p.55 - 602010/09-2010/09

CiNii

A Basic Study of Coordinated Control Method for Heat Pump Water Heaters and Electric Vehicle Battery Chargers

Y. Hanai, K. Yoshimura, J. Matsuki, and Y. Hayashi

16th International Conference on Electrical Engineering (ICEE) 2010/07-

A Basic Study of Load Management using Heat-Pump Water Heater and Electric Vehicle Battery Charger in Distribution System with PV

Y. Hanai, K. Yoshimura, J. Matsuki, and Y. Hayashi

16th International Conference on Electrical Engineering (ICEE) 2010/07-

Restraint Method of Voltage Total Harmonic Distortion in Distribution System by Active Filter Operation of Distributed Generators with Inverter Using Measured Data from IT Switches

S. Kawasaki, K. Shimoda, J. Matsuki, and Y. Hayashi

16th International Conference on Electrical Engineering (ICEE) 2010/07-

An Evaluation of Influences on Distribution Network by Connection Cases of PVs

H. Takano, K. Nagata, Y. Hayashi, and J. Matsuki

I16th International Conference on Electrical Engineering (ICEE) 2010/07-

Verification of Multi-Objective Power Factor Control Method of Photovoltaic Generation Systems by Scaled-down Distribution Network Equipment

N. Kanemoto, S. Sakai, S. Kawasaki, J. Matsuki, and Y. Hayashi

16th International Conference on Electrical Engineering (ICEE) 2010/07-

Impact of Power System Configuration and Control Methodology of Inverter Based Distributed Generation on Fault Current

D. Iioka, Y. Hayashi

16th International Conference on Electrical Engineering (ICEE) 2010/07-

分散型電源連系課題解決支援システム(ANSWER)の構築と分散型電源と配電ネットワークとの協調運用形態の実験検証

酒井重和,林 泰弘,川崎章司,松木純也,馬場旬平,横山明彦,北條昌秀,若尾真治,森健二郎,不破由晃

電気学会論文誌B(電力・エネルギー部門誌) Vol. 130(No. 5) p.473 - 4832010/05-

スマートグリッドと国内導入の必要性

林泰弘

電気協会報・特集 2010(5) p.7 - 112010/05-

Development of Distribution Network Equipment to Support the Solution of Problem of Connecting Distributed Generators (ANSWER) and Verification Experiment of Active Coordinated Operation of Distributed Generator and Distribution Network

SAKAI Shigekazu;HAYASHI Yasuhiro;KAWASAKI Shoji;MATSUKI Junya;BABA Junpei;YOKOYAMA Akihiko;HOJO Masahide;WAKAO Shinji;MORI Kenjiro;FUWA Yoshiaki

IEEJ Transactions on Power and Energy 130(5) p.473 - 4832010/05-2010/05

CiNii

Detail

ISSN:03854213

Outline:Recently, total number of distributed generators (DGs) such as photovoltaic generation system and wind power generation system connected to an actual distribution network increases drastically. The distribution network connected with many distributed generators must be operated keeping reliability of power supply, and power quality. In order to accomplish active distribution network operation to take advantage of many connections of DGs, a new coordinated operation of distribution system with many connections of DGs is necessary. So far, the authors have proposed a coordinated operation of distribution network system connected with many DGs by using sectionalizing switches control method, sending voltage control method, computation method of acceptable maximum output of DG and determination method of optimal smoothing time constant of wind power generation system with storage battery. In this paper, the authors develop an experiment of scaled-down three-phase distribution system with distributed generators in order to check the validity of the proposed approach.

Voltage Control for a Loop Distribution System with Renewable Energy Sources

Y. Hanai, J. Matsuki, Y. Hayashi

The International Conference on Renewable Energies and Power Quality(ICREPQ'10), Spain 2010/03-

Smart Grid Trend in Japan

HAYASHI Yasuhiro

TEION KOGAKU 45(9) p.410 - 4162010-2010

CiNii

Detail

ISSN:0389-2441

Outline:Through use of smart grids, countries around the world are aiming to realize construction of 21st-century electric systems that provide people with abundant, affordable, clean, efficient and reliable electric power regardless of time or location. In addition to adding advanced functions to the nation's electricity grid and thus enhancing reliability, efficiency and security, a smart grid also contributes to the strategic climate-change goal of reducing carbon emissions. This paper describes the trend toward smart grids in Japan for smooth integration of increased use of renewable energy sources and conventional bulk power systems. Several ongoing Japanese field tests relating to smart grids are also briefly introduced.

分散型電源が連系された配電ネットワークにおけるアクティブフィルタの最適設置決定手法

川﨑章司,林 泰弘,松木純也,菊谷裕隆,北條昌秀

電気学会論文誌B 129-B(6) p.733 - 7442009/06-

分散型電源の導入拡大に対応した配電系統電圧制御の動向と展望

林 泰弘

電気学会論文誌B 129-B(4) p.491 - 4942009/04-

Determination Method of Optimal Operation Schedule for Fuel Cells in Collective Housing

Yasuhiro Hayashi, Shoji Kawasaki, Junya Matsuki, Atsushi Tomomoto, Hideki Miyamoto, Toshihisa Funabashi, Yoshimichi Okuno, Takanori Hayashi

IEEJ Transactions on Power and Energy Peer Review Yes 128(10) p.1217 - 12262008/10-

Detail

Outline:In this paper, the authors propose a power and heat interchange system using fuel cells (FCs) in a collective housing and develop a determination method of optimal operation schedule for FCs in this system. The developed method is based on tabu search which is one of non-linear optimization methods. In the developed method, the optimal operation schedule is determined by using Pareto optimal solutions from two evaluation viewpoints ((1) running cost, (2) CO2 emission). In order to examine the validity of the developed method, numerical simulations are carried out for the collective housing model with 12 houses in winter, summer and middle season, and the optimal operation schedules are determined.

Determination Method of Optimal Operation Schedule for Fuel Cell System in Collective Housing

Y.Hayashi, S.Kawasaki, J.Matuki, A.Tomomoto, T.Funabashi, Y.Okuno, T.Hayashi

Proceedings of the International Conference on Electrical Engineering 2008 2008-

Determination of Optimal Smoothing Time Constant of Wind Power Generation System with Storage Battery to Control Voltage and Load Fluctuation

Y.Hayashi, S.Kawasaki, S.Sakai, J.Matuki

Proceedings of the International Conference on Electrical Engineering 2008 2008-

Multi Evaluation Method of Distribution Network with Distributed Generators

Y.Hayashi, S.Kawasaki, J.Matuki, S.Sakai, Y.Fuwa, K.Mori

International Journal of Innovations in Energy Systems and Power Vol 3(no. 2) 2008-

Optimal Allocation and Gain of Active Filter for Distribution Network Connected Distributed Generation

S.Kawasaki, Y.Hayashi, J.Matuki, H.Kikuya, M.Hojo

Proceedings of the International Conference on Electrical Engineering 2008 2008-

Online Optimization Method for Operation of Generators in a Micro Grid

Yasuhiro Hayashi, Hideki Miyamoto, Junya Matsuki, Toshio Iizuka, Hitoshi Azuma

IEEJ Transactions on Power and Energy Peer Review Yes 128(2) p.388 - 3962008-

Detail

Outline:Recently a lot of studies and developments about distributed generator such as photovoltaic generation system, wind turbine generation system and fuel cell have been performed under the background of the global environment issues and deregulation of the electricity market, and the technique of these distributed generators have progressed. Especially, micro grid which consists of several distributed generators, loads and storage battery is expected as one of the new operation system of distributed generator. However, since precipitous load fluctuation occurs in micro grid for the reason of its smaller capacity compared with conventional power system, high-accuracy load forecasting and control scheme to balance of supply and demand are needed. Namely, it is necessary to improve the precision of operation in micro grid by observing load fluctuation and correcting start-stop schedule and output of generators online. But it is not easy to determine the operation schedule of each generator in short time, because the problem to determine start-up, shut-down and output of each generator in micro grid is a mixed integer programming problem. In this paper, the authors propose an online optimization method for the optimal operation schedule of generators in micro grid. The proposed method is based on enumeration method and particle swarm optimization (PSO). In the proposed method, after picking up all unit commitment patterns of each generators satisfied with minimum up time and minimum down time constraint by using enumeration method, optimal schedule and output of generators are determined under the other operational constraints by using PSO. Numerical simulation is carried out for a micro grid model with five generators and photovoltaic generation system in order to examine the validity of the proposed method.

Active Coordinated Operation of Distribution Network System for Many Connections of Distributed Generators

Yasuhiro Hayashi, Shoji Kawasaki, Junya Matsuki, Shinji Wakao, Junpei Baba Masahide Hojo, Akihiko Yokoyama, Naoki Kobayashi, Takao Hirai, Kohei Oishi

IEEJ Transactions on Power and Energy Peer Review Yes 127(1) p.41 - 512007/01-

Detail

Outline:Recently, total number of distributed generators (DGS) such as photovoltaic generation system and wind turbine generation system connected to an actual distribution network increases drastically. The distribution network connected with many distributed generators must be operated keeping reliability of power supply, power quality and loss minimization. In order to accomplish active distribution network operation to take advantage of many connections of DGS, a new coordinated operation of distribution system with many connections of DGS is necessary. In this paper, the authors propose a coordinated operation of distribution network system connected with many DGS by using newly proposed sectionalizing switches control, sending voltage control and computation of available DG connection capability. In order to check validity of the proposed coordinated operation of distribution system, numerical simulations using the proposed coordinated distribution system operation are carried out in a practical distribution network model.

Active coordinated Operation of Distribution Network with Distributed Generators

Y.Hayashi, S.Kawasaki, J.Matuki, S.Sakai, J.Baba, A.Yokoyama, M.Hojo, S.Wakao, N.Kobayashi, K.Oishi

Proceedings of the International Conference on Electrical Engineering 2007 2007-

Basic Study on Optimal Smoothing Time Constant of Wind Power Generation System with Storage Battery to Inhibit Voltage Flunctuation in Distribution Network

Y.Hayashi, S.Kawasaki, J.Matuki, T.Nomura

Proceedings of the International Conference on Electrical Engineering 2007 2007-

Decision Method of Optimal 24-Hours Sending Voltage Profile in Distribution Network with PV Systems

Y.Hayashi, Y.Hanai, J.Matuki, Y.Fuwa, K.Mori

Proceedings of 17th International Photovoltaic Science and Engineering Conference 2007-

Determination Method of Optimal Operation Schedule for Power and Heat Interchange System using Fuel Cells in Collective Housing

Y.Hayashi, S.Kawasaki, J.Matuki, T.Funabashi, Y.Okuno, T.Hayashi

Proceedings of IEEJ-EIT Joint Symposium on Advanced Technology in Power Systems p.101 - 1062007-

Development of Computation Method to Determine Optimal Setting Value for LDC Voltage Controller Using Measured Information

Y.Hayashi, Y.Hanai, J.Matuki, N.Kobayashi, K.Oishi

Proceedings of the International Conference on Electrical Engineering 2007 2007-

Evaluation of Reduced CO2 Emissions by Distribution Loss Minimization in Japanese Distribution System

Y.Hayashi, J.Matuki, H.Takano, M.Yokoyama

Proceedings of the International Conference on Electrical Engineering 2007 2007-

Experimental study on the unified power flow controller

J.Matuki, Y.Hayashi, S.Kitajima, M.Takahashi, K.Murata

Electrical Engineering in Japan 161(2) p.8 - 152007-

Multi-objective Evaluation of Radial and Loop Distribution Network Configuration Using Distribution Network Equipment

Y.Hayashi, S.Kawasaki, J.Matuki, S.Sakai, Y.Fuwa, K.Mori

Proceedings of IEEJ-EIT Joint Symposium on Advanced Technology in Power Systems p.95 - 1002007-

Online Optimization Method for Operation of Generators in a Micro Grid

Y.Hayashi, H.Miyamoto, J.Matuki, T.Iizuka, H.Azuma

Proceedings of the International Conference on Electrical Engineering 2007 2007-

Power and Heat Interchange System using Fuel Cells in Collective Housing

Y.Hayashi, S.Kawasaki, T.Funabashi, Y.Okuno

Proceedings of The Fourth Power Conversion Conference, PCC-Nagoya 2007 2007-

Seasonal Change of Power Quality Based on Real Data at the Distribution System of Fukui University Campus

J.Matuki, Y.Hayashi, S.Kawasaki, A.Ito

Proceedings of the International Conference on Electrical Engineering 2007 2007-

Simultaneous Determination Method of Control Parameters of Voltage Regulators Installed in Radial Distribution Network Using Measurement Data

Y.Hayashi, Y.Hanai, J.Matuki, K.Mori, Y.Fuwa

Proceedings of IEEJ-EIT Joint Symposium on Advanced Technology in Power Systems 2007-

Study on Optimal Allocation and Gain of Active Filter Considering Distribution Network Configuration

S.Kawasaki, Y.Hayashi, J.Matuki, H.Kikuya, M.Hojo

Proceedings of the International Conference on Electrical Engineering 2007 2007-

Verification of Proposed Active Operation of Power Grid with PV Systems by Scaled-down Distribution Network Equipment

Y.Hayashi, S.Sakai, J.Matuki, Y.Fuwa, K.Mori

Proceedings of 17th International Photovoltaic Science and Engineering Conference 2007-

A Fault Location Method using Air-Gap Fluxes of Synchronous Generator

Junya Matsuki, Yasuhiro Hayashi, Toshikazu Nakano, Yoichi Funasaki

IEEJ Transactions on Power and Energy Peer Review Yes 127(3) p.495 - 5012007-

Detail

Outline:This paper deals with experimental investigation on a novel fault location method using air-gap flux distributions of a synchronous generator connected to a power system. Air-gap fluxes are the sum of field fluxes and armature reaction fluxes. Changes in armature current and field current at fault contribute directly to the armature reaction fluxes and field fluxes, then resultant air-gap fluxes. Therefore, air-gap fluxes can be utilized to locate fault. Wavelet analysis is applied to induced voltages of search coils which are wound around a stator tooth top for measurement of air-gap flux. It is shown that fault type and location are estimated from the change of search coil voltages measured during fault.

Computation of Locational and Hourly Maximum Output of a Distributed Generator Connected to a Distribution Feeder

Yasuhiro Hayashi, Junya Matsuki, Yuji Hanai, Shinpei Hosokawa, Naoki Kobayashi

電気学会論文誌B Peer Review Yes 126(10) p.1023 - 10312006/10-

Detail

Outline:Recently, the total number of distributed generation such as photovoltaic generation system and wind turbine generation system connected to distribution network is drastically increased. Distributed generation utilizing renewable energy can reduce the distribution loss and emission of CO2. However the distribution network with the distributed generators must be operated keeping reliability of power supply and power quality. In this paper, the authors propose a computation method to determine the maximum output of a distributed generator under the operational constrains ((1) voltage limit, (2) line current capacity, and (3) no reverse flow to bank) at arbitrary connection point and hourly period. In the proposed method, three-phase iterative load flow calculation is applied to evaluate the above operational constraints. Three-phase iterative load flow calculation has two simple procedures: (Procedure1) addition of load currents from terminal node of feeder to root one, and (Procedure2) subtraction of voltage drop from root node of feeder to terminal one. In order to check the validity of the proposed method, numerical simulations are accomplished for a distribution system model. Furthermore, characteristics of locational and hourly maximum output of distributed generator connected to distribution feeder are analyzed by several numerical examples.

Establishment of a Standard Analytical Model of Distribution Network with Distributed Generators and Development of Multi Evaluation Method for Network Configuration Candidates

Yasuhiro Hayashi, Shoji Kawasaki, Junya Matsuki, Hiroaki Matsuda, Shigekazu Sakai, Teru Miyazaki, Naoki Kobayashi

IEEJ Transactions on Power and Energy Peer Review Yes 126(10) p.1013 - 10222006/10-

Detail

Outline:Since a distribution network has many sectionalizing switches, there are huge radial network configuration candidates by states (opened or closed) of sectionalizing switches. Recently, the total number of distributed generation such as photovoltaic generation system and wind turbine generation system connected to the distribution network is drastically increased. The distribution network with the distributed generators must be operated keeping reliability of power supply and power quality. Therefore, the many configurations of the distribution network with the distributed generators must be evaluated multiply from various viewpoints such as distribution loss, total harmonic distortion, voltage imbalance and so on. In this paper, the authors propose a multi evaluation method to evaluate the distribution network configuration candidates satisfied with constraints of voltage and line current limit from three viewpoints ((1) distribution loss, (2) total harmonic distortion and (3) voltage imbalance). After establishing a standard analytical model of three sectionalized and three connected distribution network configuration with distributed generators based on the practical data, the multi evaluation for the established model is carried out by using the proposed method based on EMTP (Electro-Magnetic Transients Programs).

統合電力潮流制御装置(UPFC)の基本特性の実験と解析

Junya Matsuki, Yasuhiro Hayashi, Shunsuke Kitajima, Masahiro Takahashi, Kenji Murata

IEEJ Transactions on Power and Energy 126(6) p.605 - 6102006/06-

Detail

Outline:This paper presents the results of experimental study on the performance of a Unified Power Flow Controller (UPFC), one of the FACTS (Flexible AC Transmission Systems) controllers. A laboratory-scale UPFC was manufactured and installed on a laboratory electric power system to investigate its multifunctional capabilities as a power flow controller. The UPFC consists of two 4.5kVA, 200V back-to-back voltage-sourced converters, labeled “Converter 1" and “Converter 2", operated from a common DC link provided by a DC storage capacitor of 380V. It can provide independent control of both the real and reactive power flow in the line. Tests were performed to examine the capabilities of UPFC, under one-machine connected to an infinite-bus system. Steady-state responses under various kinds of operating conditions were measured and analyzed.

Determination Method of Loss-minimum Configuration with Mathematical Optimality in a Three Sectionalized and Three Connected Distribution Feeder Network

Yasuhiro Hayashi, Junya Matsuki, Shinji Ishikawa, Hirotaka Takano, Eiji Muto, Naoki Kobayashi

IEEJ Transactions on Power and Energy 126(5) p.516 - 5242006/05-

Detail

Outline:In a distribution system, in order to enhance the reliability of power supply, the distribution feeder is divided into several sections by installing sectionalizing switches, and then each of sectionalized sections is connected to different feeder. For example, one feeder is divided into three sections by two sectionalizing switches, and then each of divided sections is connected to other feeder through sectionalizing switch. Since a distribution system with many feeders has many sectionalizing switches, the system configuration is determined by states (opened or closed) of sectionalizing switches. Usually, power utility tries to obtain distribution loss-minimum configuration among large numbers of configuration candidates. However, it is very difficult to determine the loss-minimum configuration that the mathematical optimality is guaranteed, because it is well known that determination of distribution system's configuration is to decide whether each sectionalizing switch is opened or closed by solving a combinatorial optimization problem. In this paper, the authors propose a determination method of loss minimum configuration which the mathematical optimality is guaranteed for a three sectionalized and three connected distribution feeder network. A problem to determine the loss minimum configuration is formulated as a combinatorial optimization problems with four operational constraints ((1) feeder capacity, (2) voltage limit, (3) radial structure and (4) three sectionalization). In the proposed method, after picking up all partial configurations satisfied with radial structure constraint by using enumeration method, optimal combination of partial configurations is determined under the other operational constraints by using conventional optimization method. Numerical simulations are carried out for a distribution network model with 140 sectionalizing switches in order to examine the validity of the proposed algorithm in comparison with one of conventional meta-heuristics (Tabu search).

Service Restoration Method Considering Simultaneous Disconnection of Distributed Generators by One Bank Fault of Distribution System

Hirotaka Takano, Yasuhiro Hayashi, Junya Matsuki, Naoki Kobayashi

IEEJ Transactions on Power and Energy Peer Review Yes 126(3) p.336 - 3462006/03-

Detail

Outline:Distributed generators (DGs) such as fuel cells and solar cells etc. are going to be installed in demand side of distribution systems. The distributed generators can reduce distribution loss by appropriate allocation. However, there are several problems to install DGs such as service restoration of distribution system with DGs and so on. When one bank fault of distribution substation occurs in distribution system, since DGs are simultaneously disconnected from the system, it is not easy to restore isolated load by one bank switching in distribution substation. Therefore, a service restoration method to determine restoration configuration and restoration procedures (switching procedure from normal configuration to restoration configuration) taking into account simultaneous disconnection of DGs is needed. In this paper, the authors propose a computation method to determine the optimal restoration configuration and the restoration procedure considering simultaneous disconnection of DGs by one bank fault of distribution system. In the proposed algorithm, after all of restoration configuration candidates are effectively enumerated under the operational constraints, the optimal configuration to restore the isolated load is selected among enumerated configuration candidates. After determining the optimal restoration configuration, the optimal restoration procedures are obtained by greedy algorithm. Numerical simulations are carried out for a real scale system model with 237 sectionalizing switches (configuration candidates are 2237) and 21DGs (total output is 5250kW which is 3% of total load) in order to examine the validity of the proposed algorithm.

Acceptable Maximum Output of Potential Renewable Energy Sources for a Distribution Feeder

Y.Hayashi, J.Matsuki, Y.Hanai, N.Kobayashi, T.Hirai, K.Ohishi

Proc. of Renewable Energy 2006 2006-

Determination of the Optimal Restoration Configuration Based on Enumeration Method

Hirotaka Takano, Yasuhiro Hayashi, Junya Matsuki, Naoki Kobayashi

Proc. of ICEE 2006 International Conference on Electrical Engineering 2006-

Effective Enumeration Method of Determine Loss Mimimum Distribution Network Configuration

Hirotaka Takano, Yasuhiro Hayashi, Junya Matsuki, Naoki Kobayashi

Proc. of ICEE 2006 International Conference on Electrical Engineering 2006-

Evaluation of Available Maximum Output of Distributed Generator Connected to Distribution System

S.Kawasaki, Y.Hayashi, J.Matuki, S.Hosokawa, N.Kobayashi

Proc. of ICEE2006 International Conference on Electrical Engineering 2006-

Integrated Determination Method of Transmission and Distribution Loss-minimum Network Configuration

Yasuhiro Hayashi, Hirotaka Takano, Junya Matsuki

IEEJ Transactions on Electrical and Electronic Engineering 1(3) p.216 - 2252006-

Multi Evaluation of Distribution Network Configuration Candidates

S.Kawasaki, Y.Hayashi, J.Matuki, H.Matsuda, S.Sakai, T.Miyazaki, N.Kobayashi

Proc. of ICEE2006 International Conference on Electrical Engineering 2006-

Optimal Grid Voltage Control in Distribution Feeder Connected PV

Y.Hayashi, J.Matuki, S.Kawasaki, S.Hosokawa, N.Kobayashi

Proc. of WCPEC4 2006 IEEE 4th World Conference on Photovoltaic Energy Conversion 2006-

An Estimation Method of Load Model Parameters for Harmonic Analysis

Yasuhiro Hayashi, Junya Matsuki, Kenichi Kobayashi, Norikazu Kanao

IEEJ Transactions on Power and Energy Peer Review Yes 125(10) p.939 - 9472005/10-

Detail

Outline:In order to devise countermeasures for harmonic disturbances and harmonic suppression in power systems effectively, it is necessary to develop a harmonic analysis approach with high accuracy. The major harmonic analysis approach is to recreate harmonic distribution in a power system model by using a simulation method. However, in order to carry out high accuracy estimation of the harmonic distribution using the simulation method, after creating a load model which consists of several parameters associated with the measured harmonic impedance, the optimal load model parameters must be determined. So far, appropriate load model parameters have been determined by trial and error. Therefore, a systematic approach to determine the optimal load model parameters is needed to estimate the measured harmonic impedance with high accuracy. In this paper, a determination method for the optimal load model parameters to estimate the measured harmonic impedance is proposed. The proposed method is based on Particle Swarm Optimization (PSO), which is one of optimization methods by using concept of swarm intelligence. In order to check the validity of the proposed method, the load model parameters estimated by the proposed method are evaluated using test data and filed data of Hokuriku electric power company.

Determination Method for Optimal Sending Voltage Profile in Distribution System with Distributed Generators

Yasuhiro Hayashi, Junya Matsuki, Ryoji Suzuki, Eiji Muto

IEEJ Transactions on Power and Energy Peer Review Yes 125(9) p.846 - 8542005/09-

Detail

Outline:Sending voltage profile of distribution feeder is controlled by changing a tap of distribution transformer. In a distribution network with distributed generators, for reasons of effect of reversed flows from them and existence of a great number of sending voltage profile candidates, it is not easy to control sending voltage profile within the acceptable voltage limit. In this paper, in order to determine the optimal sending voltage profile of distribution transformer in a distribution network with distributed generators, the authors propose a new method to determine the optimal sending voltage profile so as to minimize total number of tap position's change per day under constraints of acceptable voltage limit. In the proposed method, after calculating acceptable range of three phase voltage of distribution feeder, the optimal profile of tap position within the calculated acceptable voltage range is determined among these candidates by using reduced ordered binary decision diagram (ROBDD) which is an efficient enumeration algorithm. In order to check the validity of the proposed method, numerical simulations are carried out for a distribution network model with a distributed generator.

Computation Method to Improve Three-phase Voltage Imbalance by Exchange of Single-phase Load Connection

Yasuhiro Hayashi, Junya Matsuki, Masayoshi Ohashi, Yasuyuki Tada

IEEJ Transactions on Power and Energy Peer Review Yes 125(4) p.365 - 3722005/04-

Detail

Outline:Three-phase voltage imbalance occurs by variety of connecting points of single-phase loads. In order to improve three-phase voltage imbalance, connecting points of single-phases loads are exchanged. System planner has to decide how to exchange connection of single-phase loads with the minimum planning cost in order to improve three-phase voltage imbalance. However, since there are many patterns of connection for single-phase loads, it is not easy to determine the optimal connection pattern for single-phase loads with the minimum planning cost under the constraint for improving voltage imbalance. In this paper, authors propose a computational method to support the planner's decision of single-phase loads connection systematically. The proposed method, which is based on effective enumeration algorithm, can obtain the optimal single-phase loads connection pattern, which satisfies with constraint of voltage balance and has the minimum total number of single-phase loads exchanged from previous single-phase loads connection. In the proposed method, three-phase iterative load flow calculation is applied to calculate rate of three-phase voltage imbalance. Three-phase iterative load flow calculation has two simple procedures: (Procedure1) addition of load currents from terminal node of feeder to root one, and (Procedure2) subtraction of voltage drop from root node of feeder to terminal one. In order to check the validity of the proposed method, numerical results are shown for a distribution system model with DG.

Conceptual Study on Autonomy-Enhanced PV Clusters for Urban Community to Meet The Japanese PV2030

K.Kurokawa, S.Wakao, Y.Hayashi, I.Ishii, K.Otani, M.Yamaguchi, Y.Ono

EU-PVSEC 2005-

Power System Harmonic Analysis Using State-Estimation Method for Japanese Field Data

N.Kanao, M.Yamashita, H.Yanagida, M.Mizukami, Y.Hayashi, J.Matuki

IEEE Trans. on Power Delivery 20(2) p.970 - 9772005-

Loss Minimum Configuration of Distribution System Considering N-1 Security of Dispersed Generators

Y.Hayashi, J.Matuki

IEEE Transaction on Power Systems 19(1) p.636 - 6422004-

Overload Elimination of Secondary Power System by Load Transfer of Distribution System

H.Takano, Y.Hayashi, J.Matuki

ICEE2004/APCOT MNT2004 OD7-2p.192 - 1952004-

Distribution System Planning Evaluation Method Using Voronoi Diagram and Tabu Search

Yasuhiro Hayashi, Junya Matsuki, Masaki Nose, Masatomo Inui

IEEJ Transactions on Power and Energy Peer Review Yes 123-B(10) p.1124 - 11322003/10-

Detail

Outline:Distribution planning must be carried out by considering (1) geographic information such as allocation of loads and feeders, (2) operational conditions such as line current capacity, voltage drop limit and distribution loss, and (3) facility cost and so on. In order to systematically support the above work by computational approach, optimization techniques are available. In this paper, a computational method to support distributional planning systematically is proposed by introducing (1) geographical optimization technique and (2) configuration optimization technique. The geographical optimization is to determine which of sectionalized lines should supply power to future appeared loads so as to maximize availability ratio of feeders. The configuration optimization is to determine states of sectionalizing switches (opened or closed) so as to minimize distribution loss under the constraints such as the line current capacity, voltage drop limit and radial structure. In the proposed method, after the geographical optimization is carried out to determine future section loads, operational conditions are evaluated by the configuration optimization. If the operational constraints are not satisfied, previously prepared expansion plan candidates are evaluated quantitatively, and then the best candidate is decided. Voronoi diagram is applied to realize the geographical optimization, and tabu search is used to accomplish the configuration optimization. In order to check the validity of the proposed method, numerical results are shown for a distribution system model.

Multi Objective Evaluation for Local Power System Configuration Based on Deterministic and Probabilistic Approaches

Yasuhiro Hayashi, Junya Matsuki, Kazuhisa Sato, Yuko Tokunoh

IEEJ Transactions on Power and Energy Peer Review Yes 123(10) p.1172 - 11792003/10-

Detail

Outline:Local power systems (66kV) are served from the 275kV or 154kV substations. In order to maintain power supply reliability, the transmission lines are connected to several substations, and the operational configuration is radial. Since practical local power system has a number of transmission lines, many configuration candidates occur. It is expected to effectively evaluate these configuration candidates from various viewpoints such as reliability of power supply, transmission loss and so on. In this paper, the authors propose a multi objective evaluation method by using deterministic and probabilistic approaches for local power system configuration. In the proposed multi objective evaluation method, after selecting system configuration candidates which satisfy N-1 security by using an optimization method based on Boolean function, these candidates are evaluated from viewpoints of expected outage time, transmission loss and facility operation rate. In order to check the validity of the proposed method, numerical results are shown for a practical local system model with about 39 × 1027 configuration.

Application of Improved PSO to Power Flow Control by TCSC for Maximum Acceptance of Requested Wheeled Power

Yasuhiro Hayashi, Junya Matsuki, Genshin Kanai

IEEJ Transactions on Power and Energy Peer Review Yes 123(10) p.1133 - 11412003/10-

Detail

Outline:Open access to electric power transmission networks has been carried out in order to foster generation competition and customer choice in the worldwide. When several PPSs request to simultaneously supply power to customers based on bilateral contracts, it is expected that transmission network accepts amounts of wheeled power requested by the PPSs as much as possible. It is possible to maximize total requested wheeled power by controlling power flow through transmission lines. It is well known that FACTS device is available to control line flow flexibly. In this paper, in order to maximize total wheeled power simultaneously requested by several PPSs, the authors propose an algorithm to determine the optimal reactance of TCSC (one of FACTS devices). The proposed algorithm is based on Particle Swarm Optimization (PSO), which is one of optimization methods based on swarm intelligence. In the proposed algorithm, PSO is improved to enhance ability of searching global minimum by giving different characteristic to behavior of each agent. In order to check the validity of the proposed method, numerical results are shown for 6 and IEEE 30 bus system models.

Computation Method for Simultaneous Transfer Capability Considering Wheeled Power by PPS

Yasuhiro Hayashi, Junya Matsuki, Takayuki Ikeda

IEEJ Transactions on Power and Energy Peer Review Yes 122(12) p.1366 - 13752002/12-

Detail

Outline:Open access to electric power transmission networks has been carried out in order to foster generation competition and customer choice in the worldwide. Available transfer capability(ATC) is the largest additional amount of power above some base flow which can be transferred between two sets of buses under constraints such as voltage limit, overloads, stability and n-1 contingencies. Calculation of ATC is important to promote open access to electric power transmission networks. If there are several ATC between two sets of buses, simultaneous transfer capability(STC) of power transmission networks must be calculated. STC is defined as the ability of a transmission network to allow for the reliable movement of electric power from areas of supply to areas of demand. In this paper, a new algorithm to precisely calculate STC is proposed. The proposed method is based on linear programming(LP) based DC power flow and optimal power flow (OPF). Namely, LP base DC power flow is used to obtain the initial solution of STC, and then OPF using successive quadratic programming (SQP) is applied to obtain feasible solution of STC under the operational constraints such as balance of power supply and demand, voltage limit, overloads, generation limit, steady state stability and n-1 contingencies. Furthermore, if power wheeling transactions by several PPSs are simultaneously requested for the transmission network, it seems that the acceptable quantity for the requested wheeling power must be indicated to PPSs from a view point of the transmission network reliability. An algorithm to calculate the acceptable quantity for the requested wheeling power is also proposed by using STC computation. In order to check the validity of the proposed methods, numerical results are shown for 6 and IEEE 30 buses system models.

Determination Method for Loss-minimum Distribution System Configuration Considering Disconnection of Installed Dispersed Generators

Yasuhiro Hayashi, Junya Matsuki, Hirotaka Takano

IEEJ Transactions on Power and Energy 122(12) p.1376 - 13832002/12-

Detail

Outline:Dispersed generators (DGs) such as fuel cells and solar cells etc. are going to be installed in demand side of power systems. The dispersed facilities can reduce distribution system loss by the appropriate allocation. However, when a DG which has large capacity is disconnected from the distribution network by a fault, violation of the operational constraints such as the line capacity and voltage drop may occur. From a view point of system reliability, robust system configuration for suddenly disconnecting DG from the distribution network must be determined, since system operators can not control DG connection to the network in the on-line. In this paper, the authors propose an algorithm to determine the loss-minimum configuration for a distribution system with DGs maintaining system reliability. Namely, in the proposed algorithm, when the loss-minimum configuration is determined under the line current capacity and voltage drop constraints, n-1 contingencies for DGs are also considered. In order to determine the loss-minimum configuration, tabu search added strategic oscillation is employed. Numerical simulations are carried out for a real scale system model with 118 sectionalizing switches (configuration candidates is 2118) in order to examine the validity of the proposed algorithm. Furthermore, performance of the proposed method is compared with a conventional metaheuristic method, which is Simulated Annealing (SA), through numerical simulations for the system model.

Calculation of the Loss-minimum Configuration in IEEJ Local Power System Model

Yasuhiro Hayashi, Junya Matsuki, Ikuo Kurihara

電気学会論文誌B Peer Review Yes 122(10) p.1082 - 10882002/10-

Detail

Outline:In Japan, local power systems (77kV) are served from the 275kV or 154kV substations. For enhancement of power supply reliability, the transmission lines are connected to several substations, and the operational configuration is radial. The local power system's configuration is determined by connecting and disconnecting transmission lines so as to keep the radial structure and satisfy the operational constraints. When a local power system has a number of transmission lines, many configuration candidates occurs. Recently, an IEEJ committee made a practical scale local system model (IEEJ Local System Model). Since IEEJ Local System Model has 76 transmission lines, the total number of configuration candidates is 276(=7.5×1022 approximately). In this paper, the authors try to strictly obtain the loss-minimum configuration under constraints such as substation capacity, line capacity and radial structure in IEEJ Local System Model. In order to obtain the optimal configuration, a new computation algorithm is proposed. In the proposed algorithm, the configuration determination problem is replaced as two combinatorial optimization problems based on the operational constraints (1)substation capacity, (2)line capacity and (3)radial structure). One combinatorial optimization problem (subprobleml) is to pick up all partial configurations satisfied with line capacity and radial structure constraints. The, other one (subproblem2) is to select the partial configurations so as to minimize total line loss under the substation capacity constraint. By using the enumeration method, subprobleml is solved. Subproblem2 is solved by using the reduced ordered binary decision diagram (ROBDD). Since the proposed method is based on enumeration and Boolean function, the optimality of obtained solution is guaranteed.

Determination of Loss-minimum Distribution System’s Configuration

Y.Hayashi, J.Matsuki

Proc. of International Conference on Electrical Engineering(ICEE), Cheju, Korea, 257-261 2002-

Determination of Optimal System Configuration for Japanese Power System Model

Y.Hayashi, J.Matsuki

Proc. of IEEE/PES Transmission and Distribution Conference and Exhibition 2002, Yokohama, Japan, 220-225 2002-

Experimental Study on the Unified Power Flow Controller

J.Matuki, Y.Hayashi, S.Kitajima

Proc. of International Conference on Electrical Engineering(ICEE), Cheju, Korea,2097-2102 2002-

Thyristor Controlled Series Capacitor for Damping Power System Oscillations

J.Matsuki, Y.Hayashi, S.Hasegawa

Proc. of IASTED International Conference on Power and Energy Systems, Los Angeles, USA, 173-177 2002-

Determination Method for Optimal Secondary Power System Structure Using ROBDD

Yasuhiro Hayashi, Junya Matsuki, Koichi Nara

IEEJ Transactions on Power and Energy Peer Review Yes 121(2) p.172 - 1782001/02-

Detail

Outline:Secondary power systems (66kV) with radial system structures are served from the 275kV or 154kV substations. For enhancement of power supply reliability, the transmission line is connected to another substation. However, when the radial power system has a number of connected feeders, the combinatorial number of possible system structures by switching CBs becomes very large. In this paper, a new solution method to determine the optimal secondary power system configuration is proposed. In the proposed method, the determination problem of the optimal system structure is treated as a minimum spanning tree problem with constraints, and then it is solved by using reduced ordered binary decision diagram (ROBDD). Since the proposed method is based on Boolean function, the optimality of obtained solution is guaranteed. In order to check the validity of the proposed method, numerical simulations are carried out for system models, and the results obtained by branch and bound method are compared with these of proposed method.

Optimal Allocation of Dispersed Generators for Loss Minimization

Koichi Nara, Yasuhiro Hayashi, Bin Deng, Kazushige Ikeda, Tomoo Ashizawa

IEEJ Transactions on Power and Energy Peer Review Yes 120(5) p.672 - 6772000/05-

Detail

Outline:Dispersed generators (DG) such as fuel cells and solar cells etc. are going to be installed in demand side of power systems. The dispersed facilities can reduce distribution system loss by the appropriate allocation. So far, planning and operation of distribution system with the dispersed facilities have been discussed. In this paper, the authors discuss about how much the distribution system loss minimization can be reduced if DGs are optimally allocated at the demand side of the distribution system. In order to determine the optimal allocation and size of DG for minimizing the distribution system loss, an algorithm based on tabu search is employed. The proposed algorithm consists of the repetition of nested use of the tabu search algorithm. Namely, in the proposed algorithm, in one computational iteration, after the location of DG is temporarily determined by tabu search, the size of DG is also determined by tabu search so as to minimize the distribution system loss for the temporarily determined allocation. Numerical simulations are carried out for two system models in order to examine the validity of the algorithm.

Evaluation Method of Electrical Power Congestion Possibility in Open Market System

K.Nara, Y.Hayashi, C.Takahashi, T.Shirasaki, H.Sato

Proc. of the 5th International Conference on Probabilistic Safety Assessment and Management(PSAM5), 447-452 2000-

Loss Minimum Re-configuration of Distribution Systems with Dispersed Generators

K.Nara, Y.Hayashi, K.Ikeda, T.Ashizawa

Proc. of International Conference on Electrical Engineering(ICEE2K), 560-563 2000-

A Solution Algorithm Based on Multi-stage Tabu Search for Nested Combinatorial Optimization Problem

K.Nara, Y.Hayashi

Proc. of IEEE Systems, Man and Cybernetics Conference (SMC) p.551 - 5561999-

Determination of Optimal Secondary Power System Configuration Using Reduced Ordered Binary Decision Diagram

Y.Hayashi, K.Nara

Proc. of International Conference on Electrical Engineering(ICEE), pp.127-130, 1999-

Discrete Optimal Power Flow by Tabu Search

K.Nara, Hua Hu, Y.Hayashi

Proc. of International Conference on Electrical Engineering(ICEE), pp.20-23, 1999-

Operational Simulation of Flexible, Reliable and Intelligent Electrical Energy Delivery System Using PSCAD/EMTDC

J.Hasegawa, H.Kita, Y.Mishima, K.Nara, Y.Hayashi

Proc. of American Power Conference, pp.518-523 1999-

Tabu Search Algorithm for Loss Minimum DG Allocation

K.Nara, Y.Hayashi

Proc. of IEEE International Conference on Intelligent Systems Applications to Power Systems Proceedings(ISAP), pp.180-184 1999-

An Approximate Solution Algorithm for Load Balancing of Distribution Systems

Keeyoung Nam, Yasuhiro Hayashi, Koichi Nara

IEEJ Transactions on Power and Energy Peer Review Yes 118(9) p.983 - 9891998/09-

Detail

Outline:This paper proposes a new algorithm to obtain an approximate optimal solution for the load balancing of large-scale radial distribution system. Since the problem is formulated as a combinatorial optimization problem because of the discreteness of load section connection, it is difficult to solve a large-scale combinatorial optimization problem accurately within the reasonable computational time. So for, in order to find an approximate optimal solution quickly, the authors have published a solution method based on the network flow incremental algorithm. Although the incremental algorithm can find the optimal solution to the problem, the result is not always radial (feasible). So as to overcome this deficiency, in this paper, the authors propose a new algorithm that can find the load balanced radial distribution feeder configuration. The proposed algorithm picks up load by a unit of a section load. Therefore, the problem is elementarily a combinatorial optimization problem. However, to avoid the permutation, the algorithm employs a heuristic algorithm based on the mathematical concept of the optimality of the incremental algorithm. In picking up section load, the algorithm can take into account not only the current load balance but also the expected load which feeders should pick up afterward. To realize this algorithm, a combination of labels is introduced to each node. Through numerical examples, the validity of the proposed method is examined.

A New Algorithm for Distribution Feeder Expansion Planning in Urban Area

K.Nara, Y.Hayashi, S.Muto, K.Tuchida

Electric Power Systems Research, Vol.46, pp.185-193, 1998-

A Novel Automatic Contingency Selection Algorithm for Dynamic Security Assessment

D.Gan, Y.Hayashi, K.Nara, Z.Du, X.Wang, X.Wang

International Journal of Power and Energy System, Vol.18, No.3, pp.157-160, 1998-

Evaluation Method of Electrical Power Congestion Possibility in Open Market System

K.Nara, Y.Hayashi, C.Takahashi, T.Shirasaki, H.Sato

Proc. of the 5th International Conference on Probabilistic Safety Assessment and Management(PSAM5), 447-452 1998-

Scenario Selection by Genetic Algorithm for Evaluating Power Resource Planning

Y.Hayashi, K.Nara

International Journal of Power and Energy System, Vol.18, No.2, pp.142-146, 1998-

Determination of Newly Installed Feeder Route Considering Use of Existing Feeder

Koichi Nara, Yasuhiro Hayashi, Yukihiro Yamafuji, Hideo Tanaka, Jun Hagihara, Shoichi Muto, Kotaro Tuchida, Masahiro Sakuraoka

IEEJ Transactions on Power and Energy Peer Review Yes 117(6) p.798 - 8051997/06-

Detail

Outline:In planning a distribution system for urban area, when a feeder is newly installed, the route of the feeder must be determined among many candidates, considering investment cost and constraints. However, it is difficult for planners to find the optimal route of the newly installed feeder. Because too many candidates of route exist which can be constructed along the road on service area of the power company. It must be considered whether the end part of an existing feeder can be used as apart of newly installed feeder within specified loaded value. In this paper, in order to support planners' decision for selecting optimal route of newly installed feeders, the authors have formulated the problem mathematically, and propose a new solution algorithm to find the optimal route by referring Dijkstra Method. Through numerical examples, authors demonstrate the validity of the proposed method.

Development of Negotiation Expert System for Subtransmission System Planning

Y. Aihara, Y. Hayashi, T. Terashima, I. Takemoto, S.Iwamoto

IEEJ Transactions on Power and Energy Peer Review Yes 115(7) p.778 - 7861995/07-

Detail

Outline:Recently the task of planning in power systems is becoming a very complicated process for utility planners. This kind of planning has a lot of objectives to accomplish. In this paper we employ Negotiation Algorithm, which was proposed by the group of Chen-Ching Liu, for subtransmission power system planning to create a plan having many objectives. First, the Goal-Decision-Network(GDN) is constructed to model this planning problem, and Negotiation Algorithm is applied to utilize both subtrasmission system planning GDN, which attempts to capture its knowledge, and negotiation operators, which search for the most feasible and promising decisions in this planning GDN. Finally the negotiation expert system is demonstrated for the subtransmission system planning using a real system.

Application of Improved Hopfield Model to Voltage Control Problem

Yasuhiro Hayashi, Shinichi Iwamoto

IEEJ Transactions on Power and Energy Peer Review Yes 112(8) p.685 - 6921992/08-

Detail

Outline:The voltage control calculation is the combinatorial optimization problem, and it has been difficult to solve this type of problem quickly with the conventional digital computer. However according to the modelling of excellent parallel processing ability of neurons, it has become possible to carry out the optimization with the Hopfield neural network model. In this paper, in order to solve the voltage control problem we propose an improved Hopfield model which has an individual input-output function for an individual neuron to achieve a drastic improvement in the calculation time.

Introduction of Neural Network Theory to Load Flow Problem

Yasuhiro Hayashi, Shinichi Iwamoto

IEEJ Transactions on Power and Energy Peer Review Yes 111(7) p.713 - 7221991/07-

Detail

Outline:In recent years, according to the modelling of excellent information processing ability of neurons, it has become possible to carry out pattern recognitions or optimizations with the neural network theory. In this paper, we show how to introduce the neural network theory to the load-flow calculation of rectangular coordinate. A problem which input-output functions have for neural network applications is pointed out, and effects of changes in load patterns and system size are discussed in terms of the optimal multiplier. Results of simulations are shown with the convergence characteristics.

Distribution network verification for secure restoration by enumerating all critical failures

Takeru Inoue, Norihito Yasuda, Shunsuke Kawano, Yuji Takenobu, Shin-ichi Minato, Yasuhiro Hayashi

IEEE Transactions on Smart Grid Peer Review Yes 6(2) p.843 - 852

DOI

Detail

Outline:If several feeders are interrupted in a severe accident, distribution networks should be restored by reconfiguring switches automatically with smart grid technologies. Although there have been several restoration algorithms developed to find the new network configuration, they might fail to restore the whole network if the network were critically damaged. The network's design has to guarantee that it is restorable under any possible failure for secure power delivery, but it is a computationally hard task to examine all possible failures in a large-scale network with complex electrical constraints. This paper proposes a novel method to find all the critical (unrestorable) line cuts with great efficiency to verify the network design. The proposed method first runs a fast screening algorithm based on hitting set enumeration; the algorithm selects suspicious cuts without naively examining all possible cuts. Next, unrestorable cuts are identified from the suspicious ones with another algorithm, which strictly tests the restorability of the network under each suspicious cut without redundantly repeating heavy power flow calculations. Thorough experiments on two distribution networks reveal that the proposed method can find thousands of unrestorable cuts from the trillions of possible cuts in a large 432-Bus network with no significant false negatives.

Books And Publication

Cyber Security for Voltage Control of Distribution Systems Under Data Falsification Attacks

Hideaki Ishii, Shinya Yoshizawa, Yu Fujimoto, Isao Ono, Takashi Onoda, and Yasuhiro Hayashi

Springer International Publishing2020-

Detali

Responsible Number of Pages:145-165

“Demand-Side Response/Home Energy Management”, Smart Grid Handbook

Hideo Ishii, Wataru Hirohashi, Masataka Mitsuoka, Yasuhiro Hayashi(Joint authorship)

John Wiley & Sons, Ltd.2016/06-

Detali

Dictionary/EncyclopediaTotal Number of Pages:1900Responsible Number of Pages:1235-1252ISBN:9781118755488

スマートグリッド学—戦略・技術・方法論—

林泰弘(編著),岡本浩,林秀樹,濱坂隆,伊奈友子,坂本紀代美

日本電気協会新聞部2010/12-

Detali

ISBN:978-4-902553-99-4

スマートグリッドの構成技術と標準化

横山明彦,林泰弘,坂東茂,林秀樹,新井正伸,姉川尚史,合田忠弘,浅野浩志,今井伸一,木槻純一,山田竜也,弥栄邦俊

日本規格協会2010/06-

Detali

ISBN:978-4-542-30183-2

電力系統の最適潮流計算(OPF,Optimal Power Flow)

関根泰次,横山明彦,安田恵一郎,林泰弘,田辺隆也,岡本浩,多田泰之

日本電気協会2002-

Lecture And Oral

Evaluation and Visualization of kW / kWh Cost of a District Heating and Cooling System for Electricity Adjustment

Kohei TOMITA, Yasuhiro HAYASHI, Yutaka IINO, Yuto YAMAMOTO, Kosuke KOBAYASHI

ICEEN 2020: The 8th International Conference on Electrical Energy and Networks, Singapore, March 7-9, 20202020/03

On Nonintrusive Monitoring of Electrical Appliance Load via Restricted Boltzmann Machine with Temporal Reservoir

Megumi Fujita, Yu Fujimoto, Yasuhiro Hayashi

12th The International Conference on Agents and Artificial Intelligence 2020, Valletta-Malta2020/02

Stability Evaluation of a Multi-objective Dispatch of Frequency Control Generators in Cross-Regional Operation under Various Conditions

Daichi Azami, Akihisa Kaneko, Yasuhiro Hayashi, Shun Tanaka

IEEE The International Smart Grid Technologies (ISGT) Nortth America Conference 2020, Washington DC2020/02

Estimation of Expected Cost Curve on Operation Parameter Space for Planning Residential PEFC-CGS

Yuta Tsuchiya, Yu Fujimoto, Akira Yoshida, Yoshiharu Amano, Yasuhiro Hayashi

The 13th IEEE PES PowerTech 2019, Milano, Italy2020

Hot Water Demand Prediction Method for Operational Planning of Residential Fuel Cell System

Yuta Tsuchiya, Yu Fujimoto, Akira Yoshida, Yoshiharu Amano, Yasuhiro Hayashi

7th International Conference on Smart Grid (icSmarGrid 2019)2019/12

Multiple Scenario-based Model Predictive Control with Decision Time Limit Determination of Scenario Selection

Yutaka Iino,Yasuhiro Hayashi

2019 58th Annual Conference of the Society of Instrument and Control Engineers of Japan, SICE 2019 8859962,2019/09

LDC-Control Parameters Determination by the Planes Using Measured Data from IT-switches in Distribution Systems with PV Systems,

Akihisa Kaneko, Yasuhiro Hayashi, Masakazu Ito, Takaya Anegawa, Hideyasu Hokazono, Masayuki Oyama

The 6th International Conference on Power and Energy Systems Engineering (CPESE 2019), Okinawa Japan2019/09

Proposal and evaluation of an equipment operating method using solar radiation prediction in a zero energy house

Reina Oki, Yugo Tsuneoka, Shingo Yamaguch, Soma Sugano, Jun Nakagawa, Naoya Watanabe, Tatsuhiro Kobayashi, Shin-ichi Tanabe, Takashi Akimoto, Yasuhiro Hayashi and Shinji Wakao

E3S Web of Conferences2019/08

Enhancing Security for Voltage Control of Distribution Systems under Data Falsification Attacks

Mizuki Onogawa, Shinya Yoshizawa, Yu Fujimoto, Hideaki Ishii, Isao Ono, Takashi Onoda, and Yasuhiro Hayashi

Proceedings of the American Control Conference, 20192019/07

Optimal Configuration of Loop-Radial Hybrid Distribution Networks under Various PV Systems Penetration

Akihisa Kaneko, Masakazu Ito, Yasuhiro Hayashi, Takaya Anegawa, Hideyasu Hokazono, Masayuki Oyama

The International Council on Electrical Engineering ICEE Conference 20192019/07

Analysis of Energy Procurement Balance Focusing on Imbalance Settlement Scheme in Japanese Electricity Market

Nanae Kaneko, Yu Fujimoto

International Council on Electrical Engineering ICEE Conference 20192019/07

Evaluation of Impact on Light Rail Transit Using Integrated Dynamic Modeling of Power and Transportation System

Hiroyuki Kosaba, Hiroyasu Kobayashi, Yuji Takenobu, Teru Miyazaki, Yu Fujimoto, Yutaka Iino, Masataka Mitsuoka, Keiichiro Kondo, Yasuhiro Hayashi, Ryota Yamamoto, Masahiko Hasegawa, Jun Yoshinaga

International Council on Electrical Engineering ICEE Conference 20192019/07

Evaluation of Dynamic Var Support from PV Systems under Uncertain Weather Conditions

Eita Mizukami, Akihisa Kaneko, Yuji Takenobu, Satoru Akagi, Shinya Yoshizawa, Hideo Ishii, Yasuhiro Hayashi,

International Youth Conference on Energy (IYCE 2019), Bled, Slovenia2019/07

Forecast of Electricity Spot Prices in Japan on Integrating Multiple Open Data-Driven Prediction Methods

Manaka Omura, Yu Fujimoto, Toshiyuki Sawa, Hiroto Sasaki, Naoto Fukuyama, Yoshitaka Nishino, Yasuhiro Hayashi

The International Conference on Electrical Engineering (ICEE) Conference 20192019/07

Robustness Evaluation Method of Loss Minimization Approach for Actual Distribution Network Configuration against Uncertainty of Annual Load and PV Curves,

Sakura Ami, Yuji Takenobu, Shingo Uchiyama, Teru Miyazaki, Yu Fujimoto, Yasuhiro Hayashi, Ryota Yamamoto, Takaki Yasui

The International Conference on Electrical Engineering (ICEE) Conference 20192019/07

Voltage Control Performance Evaluation of Advanced Inverter Function for Photovoltaic Integration in Distribution Networks

Yu Yanagiya, Kohei Murakami, Shinya Yoshizawa, Hideo Ishii, Yasuhiro Hayashi

The International Conference on Electrical Engineering (ICEE) Conference 20192019/07

Residential Battery Conmtrol Methjod for Life Continuity Planning in Home with Medical Equipment

Fujio Iwata, Akihiro Iwata, Shinya Yoshizawa, Yu Fujimoto, and Yasuhiro Hayashi

The International Conference on Electrical Engineering (ICEE) Conference 20192019/07

Experimental Study of the Isolated Operation of a home DC Link System,

Teru Miyazaki, Wataru Hirohashi, Jun Yoshinaga, Yasuhiro Hayashi, Kosuke Kobayashi, and Tatsuya Tsukada

CIRED 2019 25th International Conference on Electricity Distribution, Madrid 3-6 June 20192019/06

Expected Cost Curve on Operation Parameter Space for Planning Residential PEFC–CGS

Yuta Tsuchiya, Yasuhiro Hayashi, Yu Fujimoto, Akira Yoshida, Yoshiharu Amano

2019 IEEE Milan PowerTech, PowerTech 20192019/06

Decentralized Charging Control of Battery Energy Storage Systems

Riku Okubo, Shinya Yoshizawa, and Yasuhiro Hayashi, Shunsuke Kawano, Tomihiro Takano, and Nobuhiko Itaya

2019 IEEE Milan PowerTech, PowerTech 20192019/06

Toward Data-Driven Identification of Essential Factors Causing Seasonal Change in Daily Electricity Demand Curve

Nanae Kaneko, Yu Fujimoto, Yasuhiro Hayashi

the 13th IEEE PowerTech 2019, Milano, Italy2019/06

Asynchronous ADMM HEMS aggregation scheme in smart grid

Akira Yoshida, Yu Fujimoto, Yoshiharu Amano, Yasuhiro Hayashi

the 31st International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (2018)2019/05

Japan's R&D Project of Ramp Forecasting Technology: A Machine Learning Scheme for Ramp Forecast

Yu Fujimoto, Kazutoshi Higashiyama, Yasuhiro Hayashi

17th internationaol wind workshop, Stockholm2018/10

Evaluation of Voltage Regulation Functions of Smart Inverters Based on Penetration Level and Curtailment in Photovoltaic Systems

Yuta Takasawa, Satoru Akagi, Shinya Yoshizawa, Hideo Ishii, Yasuhiro Hayashi

2018 IEEE PES Innovative Smart Grid Technologies Conference Europe, ISGT-Europe 20182018/10

Optimal Responses of Home Energy Management Systems to Volt-watt Functions and Forecast Errors

Dao Van Tu, Hideo Ishii, Yasuhiro Hayashi, Yuta Takasawa, Kohei Murakami, Yuji Takenobu, Hiroshi Kikusato, Akihisa Kaneko, Shinya Yoshizawa

2018 IEEE PES Innovative Smart Grid Technologies Conference Europe, ISGT-Europe 20182018/10

HEMS Operation with Utility Requirements for Rooftop Solar-Battery Systems

Van Tu Dao, Hideo Ishii, Yasuhiro Hayashi

2018 IEEE Power & Energy Society General Meeting (PESGM)2018/08

Evaluation of Dynamic Voltage Responses of Distributed Energy Resources in Distribution Systems

Yuji Takenobu, Satoru Akagi, Hideo Ishii, Yasuhiro Hayashi, Jens Boemer, Deepak Ramasubramanian, Parag Mitra, Anish Gaikwad, Ben york

2018 IEEE Power & Energy Society General Meeting (PESGM)2018/08

Scheduling Method of Wind Power Generation for Electricity Market using State-of-Charge Transition and Forecast Error

Aki Kikuchi, Masakazu Ito,Yasuhiro Hayashi

24th International Conference on Electrical Engineering, Seoul, Korea2018/06

Configuration of Large-Scale Battery System with Volt-VAR function in Distribution Network with Advanced Load Tap Changer Control

Satoru Akagi, Ben York, Mobolaji Bello, Hideo Ishii, Yasuhiro Hayashi

2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC)2018/06

A Comparative Study of Regional Wind Power Forecasting:Direct Approach and Aggregating Approach

Kazutoshi Higashiyama, Yu Fujimoto, Yasuhiro Hayashi

GRE 2018 (Grand Renewable Energy)2018/06

Emerging Requirement in Decentralized and Democratized Electric Power System

Hideo Ishii, Kazuhiko Ogimoto, Yasuhiro Hayashi

GRE 2018 (Grand Renewable Energy)2018/06

Optimal Responses of Home Energy Management Systems to Aggregator and Utility Requirements

Van Tu Dao, Hideo Ishii, Yasuhiro Hayashi, Yuta Takasawa, Kohei Murakami

ISGT Asia 2018 (IEEE Innovative Smart Grid Technologies- Asia)2018/05

Hierarchical BESS management for electric power self-supply ratio improvement and power flow reduction in residential town

Tetsuro Tani, Shiya Yoshizawa, Teru Miyazaki, Wataru Hirohashi, Yasuhiro Hayashi, Masakazu Shio, Takashi Umeoka

2018 IEEE Power and Energy Society Innovative Smart Grid Technologies Conference, ISGT 20182018/02

Effectiveness of updating the parameters of the Volt-VAR control depending on the PV penetration rate and weather conditions

Yuta Takasawa, Satoru Akagi, Shinya Yoshizawa, Hideo Ishii, Yasuhiro Hayashi

2017 IEEE Innovative Smart Grid Technologies - Asia (ISGT-Asia)2017/12

Installed generator capacity determination method with variable weather-based SOC operation for island-alone off-grid system

Souichiro Kama, Jun Yoshinaga, Wataru Hirohashi, Yasuhiro Hayashi, Masato Watanabe, Hikaru Takigasaki

2017 IEEE Innovative Smart Grid Technologies - Asia (ISGT-Asia)2017/12

Evaluation of energy-loss minimum operations using real measurements and network data

Shingo Uchiyama, Yuji Takenobu, Jun Yoshinaga, Yasuhiro Hayashi, Masato Watanabe, Ryota Yamamoto

2017 IEEE Innovative Smart Grid Technologies - Asia (ISGT-Asia)2017/12

Optimal smart functions of large-scale PV inverters in distribution systems

Van Tu Dao, Hideo Ishii, Yasuhiro Hayashi

2017 IEEE Innovative Smart Grid Technologies - Asia (ISGT-Asia)2017/12

Feature Extraction of Numerical Weather Prediction Results Toward Reliable Wind Power Prediction

Kazutoshi Higashiyama, Yu Fujimoto, Yasuhiro Hayashi

IEEE PES Innovative Smart Grid Technologies Conference Europe2017/06

Method for Determining Voltage Control Parameters of Low-Voltage Regulator Using Forecast Interval of Photovoltaic Output

Masaya Kobayashi, Hiroshi Kikusato, Jun Yoshinaga, Yu Fujimoto, Nao Kumekawa, Shinji Wakao, Yasuhiro Hayashi, Noriyuki Motegi, Yusuke Yamashita

IEEE PES Innovative Smart Grid Technologies Conference Europe2017/06

Energy Disaggregation based on Semi-supervised Matrix Factorization using Feedback Information from Consumers

Ayumu Miyasawa, Masako Matsumoto, Yu Fujimoto, Yasuhiro Hayashi

IEEE PES Innovative Smart Grid Technologies Conference Europe2017/06

Stochastic Model Predictive Control of Residential Fuel Cell Cogeneration Unit with Periodic Forecast Update for Distributed Architecture

Akira Yoshida, Jun Yoshikawa, Yu Fujimoto, Yoshiharu Amano, Yasuhiro Hayashi

Proceedings of ECOS 2017 – 30th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems2017/06

Voltage and Energy Loss Assessment for Systems with Smart Inverter Functions of Rooftop Solar

Tu Van Dao, Hideo Ishii, Yasuhiro Hayashi

14th International Conference on Electrical Engineering/ Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)2017/06

Optimal Allocation of Photovoltaic Systems and Energy Storage Systems Considering Constraints of Both Transmission and Distribution Systems

Ryusuke Konishi, Yuji Takenobu, Masaki Takahashi, Yasuhiro Hayashi

IEEE Power and Energy Society Innovative Smart Grid Technologies Conference2017/04

Development of Prediction-based Operation Planning Method for Domestic Air-Conditioner with Adaptive Learning of Installation Environment

Ryoichi Kuroha, Yu Fujimoto, Wataru Hirohashi, Yoshiharu Amano, Shin-ichi Tanabe, Yasuhiro Hayashi

IEEE Power and Energy Society Innovative Smart Grid Technologies Conference2017/04

Coordinated Voltage Control of Load Tap Changers in Distribution Networks with Photovoltaic System

Hiroshi Kikusato, Masaya Kobayashi, Jun Yoshinaga, Yu Fujimoto, Yasuhiro Hayashi, Shinichi Kusagawa,Noriyuki Motegi

IEEE PES Innovative Smart Grid Technologies (ISGT)2016/10

Energy Disaggregation Based on Semi-Binary NMF

Masako Matsumoto, Yu Fujimoto, Yasuhiro Hayashi

International Conference on Machine Learning and Data Mining in Pattern Recognition,Vol.97292016/07

Control Methods for an Energy Storage System when Wind Power Output Deviate Grid Code

Masakazu Ito, Yu Fujimoto, Masataka Mitsuoka, Hideo Ishii, Yasuhiro Hayashi

The International Conference on Electrical Engineering 20162016/07

Advanced Decentralized Voltage Control Method of Voltage Regulators Based on Measurements in Distribution System with PVs

Kohei Murakami, Shinya Yoshizawa, Yu Fujimoto, Yasuhiro Hayashi, Shunsuke Sasaki, Hiroyuki Ishikawa, Takuya Kajikawa

The International Conference on Electrical Engineering 20162016/07

Capacity Evaluation of a Battery Energy Storage System for Multipurpose Utilization

Satoru Akagi, Shinya Yoshizawa, Jun Yoshinaga, Masakazu Ito, Yu Fujimoto, Yasuhiro Hayashi, Takashi Yano, Hideaki Nakahata, Toshiya Hisada,Xuan Mai Tran

The International Conference on Electrical Engineering 20162016/07

Methods to Determine Line Drop Compensator Control Parameters of Low-voltage Regulators Considering Temporal and Spatial Resolution of a Power Forecaset Profile

Masaya Kobayashi, Hiroshi Kikusato, Jun Yoshinaga, Yu Fujimoto, Yasuhiro Hayashi, Shinichi Kusagawa, Noriyuki Motegi

The International Conference on Electrical Engineering 20162016/07

Optimal Dispatch of Frequency Control Generators for Output Fluctuation of RES Using OPF and MOPSO

Ohsei Ikeda, Yasuhiro Hayashi,Tsuyoshi Tanaka

The International Conference on Electrical Engineering 20162016/07

Maximizing Hosting Capacity of Distributed Generation by Network Reconfiguration in Distribution System

Yuji Takenobu, Shunsuke Kawano, Yasuhiro Hayashi, Norihito Yasuda, Shin-ich Minato

19th Power Systems Computation Conference (PSCC)2016/06

Method for Enumerating Feasible LDC parameters for OLTC and SVR in Distribution Networks

Shunsuke Kawano, Shinya Yoshizawa, Yasuhiro Hayashi

Proceedings of 2nd International Conference on Intelligent Green Building and Smart Grid2016/06

Advanced Islanding Operation Method Integrating Multiple Power Supplies Including Photovoltaic Power Generation

Jun Yoshinaga, Wataru Hirohashi, Yasuhiro Hayashi, Satoshi Sato, Makoto Ohashi, Jiro Miyake, Shizuo Tsuchiya

CIRED Workshop2016/06

Centralized Voltage Control Method using Voltage Forecasting by JIT Modeling in Distribution Networks

Shunsuke Kawano, Shinya Yoshizawa, Yasuhiro Hayashi

Proceedings of IEEE Power Engineering Society Transmission and Distribution Conference2016/05

Reproducing Statistical Property of Short-Term Fluctuation in Wind Power Profiles

Seigo Furuya, Yu Fujimoto, Noboru Murata, & Yasuhiro Hayashi

10th International Renewable Energy Storage Conference2016/03

Detail

Venue:Dusseldofr, Germany

Study on Business Continuity Capability by Cooperative Operation of Photovotaic and Battery Energy Storage System

Hiroki Maruyama, Hideo Ishii, Yasuhiro Hayashi, Hajime Onojima, Yoshikane Kojima

IEEE APPEEC 20152015/11

Detail

Venue:Brisbane, Austaralia

Determination of the Most Suitable Voltage Control Method Depending on Photovoltaic Installation Rate

Satoru Akagi, Ryo Takahashi, Akihisa Kaneko, Jun Yoshinaga, Masakazu Ito,Yasuhiro Hayashi, Hiromi Konda

IEEE APPEEC 20152015/11

Detail

Venue:Brisbane, Australia

Power and Capacity Requirement for an Energy Storage from Grid Codes

Masakazu Ito, Yu Fujimoto, Masataka Mitsuoka, Hideo Ishii, Yasuhiro Hayashi

IEEE PES Asia-Pacific Power and Energy Engineering Conference 20152015/11

Detail

Venue:Brisbane, Australia

Islanding Operation Methods Integrated with Multiple Supplies and HEMS

Jun Yoshinaga, Wataru Hirohasi, Yasuhiro Hayashi, Yashito Isoe, Jiro Miyake, Shizuo Tsuchiya

2015 International Symposium on Smart Electric Distribution Systems and Technologies(EDST 2015) CIGRE SC C6 Colloquim Vienna2015/09

Detail

Venue:Vienna

Energy Disaggregation Based on Shift-Invariant Semi-Binary Matrix Factorization

MATSUMOTO, Masako, FUJIMOTO, Yu, HAYASHI, Yasuhiro

ICEE 20152015/07

Detail

Venue:Hong Kong

A Personalized Energy Management for Advanced Heating Ventilating and Air Conditioning System

MATSUMOTO, Naoya : SHOJI, Tomoaki : FUJIMOTO, Yu : AMANO, Yoshiharu : TANABE, Shin-ichi : HAYASHI, Yasuhiro

ICEE 20152015/07

Detail

Venue:Hong Kong

Basic Study of Grid-connected Battery Energy Storage System Capacity Determination for Load Leveling and Voltage Control

AKAGI, Satoru, YOSHIZAWA, Shinya, YOSHINAGA, Jun, ITO, Masakazu, FUJIMOTO, Yu, HAYASHI, Yasuhiro, YANO, Takashi, NAKAHATA, Hideaki, HISADA, Toshiya, TRAN, Xuan Mai

ICEE 20152015/07

Detail

Venue:Hong Kong

A Determination Method of Parameters of Line Drop Compensation in Distribution Systems with Photovoltaic Systems

ENOMOTO, Kyohei, KAWANO, Shunsuke, ITO, Masakazu, HAYASHI, Yasuhiro, ITO, Takaharu, ABE, Katsuya, MINAMI, Masahiro

ICEE 20152015/07

Detail

Venue:Hong Kong

Spatial Prediction for Generating Synthetic Wind Power Profiles Based on Kriging Approach

FURUYA, Seigo, FUJIMOTO, Yu, HAYASHI, Yasuhiro

ICEE 20152015/07

Detail

Venue:Hong Kong

Basic Study on Deployment of Low-Voltage Regulator Considering Existing Voltage Control in High-Voltage Distribution Systems

KIKUSATO, Hiroshi, YOSHINAGA, Jun, FUJIMOTO, Yu, HAYASHI, Yasuhiro,KUSAGAWA, Shinichi, MOTEGI, Noriyuki

ICEE 20152015/07

Detail

Venue:Hong Kong

A Study of Co-Generation Systems for Power System Frequency Control with Mass Penetration of Photovoltaic and Wind Power Generation

KOBAYASHI, Shimpei, ITO, Masakazu, HAYASHI, Yasuhiro

ICEE 20152015/07

Detail

Venue:Hong Kong

Evaluation of Demand Response Based on the Random Forests

SUDOH, Kei: FUJIMOTO, Yu : HAYASHI, Yasuhiro

ICEE 20152015/07

Detail

Venue:Hong Kong

Study of Multi-Area Energy Management Method for Peak Power Minimization

SUGIMOTO, Ryota: FUJIMOTO, Yu : HAYASHI, Yasuhiro : SANO, Yutaka : SAKAE, Chiharu

ICEE 20152015/07

Detail

Venue:Hong Kong

Evaluation of the Impacts of Tap Width Difference of Multiple Voltage Regulators on Voltage Control Performance of a Centralized Voltage Control Method

TAKAHASHI, Ryo, YOSHIZAWA, Shinya, ITO, Masakazu, HIROSHI, Asano, HAYASHI, Yasuhiro

ICEE 20152015/07

Detail

Venue:Hong Kong

Interval Forecasting for Wind Power Generation Based on Random Forests

TAKAHASHI, Yuka, FUJIMOTO, Yu, HAYASHI, Yasuhiro

ICEE 20152015/07

Detail

Venue:Hong Kong

Evaluation of Coordinated Energy Management System for Grid and Home in Distribution System with PVs

YOSHIZAWA, Shinya, YOSHIDA, Akira, KAWANO, Shunsuke, FUJIMOTO, Yu, AMANO, Yoshiharu, HAYASHI, Yasuhiro

ICEE 20152015/07

Detail

Venue:Hong Kong

Information Exchange between HEMS and GEMS for Effective EV Charge/Discharge Planning

MORI, Kohei, KIKUSATO, Hiroshi, YOSHIZAWA, Shinya, FUJIMOTO, Yu, HAYASHI, Yasuhiro, KAWASHIMA, Akihiko, INAGAKI, Shinkichi, SUZUKI, Tatsuya

ICEE 20152015/07

Detail

Venue:Hong Kong

Improvement of Prediction Interval Estimation Algorithm with Just-In-Time Modeling for PV System Operation

Tomohide Yamazaki, Shinji Wakao, Yu Fujimoto and Yasuhiro Hayashi

The 42nd IEEE Photovoltaic Specialists Conference2015/06

Detail

Venue:New Orleans, USA

Dynamic voltage regulator operation with demand side management for voltage control

A.L.M. Mufaris, J. Baba, S. Yoshizawa, Y. Hayashi

2015 IEEE Eindhoven PowerTech(Eindhoven, Netherland)2015/06

Detail

Venue:Eindhoven, Netherland

ISLANDING OPERATION TECHNOLOGY INTEGRATED WITH MULTIPLE POWER SUPPLIES

Jun Yoshinaga, Wataru Hirohashi, Yasuhito Isoe, Yasuhiro Hayashi, Jiro Miyake and Shizuo Tsuchiya

CIRED 23rd International Conference on Electricity Distribution2015/06

Detail

Venue:Lyon, France

Determination of Dynamic Line Drop Compensation Parameters of Voltage Regulators for Voltage Rise Mitigation

A.L.M. Mufaris, J. Baba, S. Yoshizawa, Y. Hayashi

ICCEP2015/06

Detail

Venue:Italy

Distribution automation system for service restoration involving simultaneous disconnection and reconnection of distributed generators

Shunsuke Kawano, Yu Fujimoto,Shinji Wakao, Yasuhiro Hayashi, Hideaki Takenaka,Hitoshi Irie,Takashi Y. Nakajima

2015 IEEE Eindhoven PowerTech2015/06

Detail

Venue:Eindhoven, Netherland

Method for Determining LDC Parameters of OLTC and Multiple SVRs in Distribution System by Using Database

Shunsuke Kawano,Shinya Yoshizawa, Yu Fujimoto and Yasuhiro Hayashi

IYCE(International Youth Conference on Energy)2015/05

Multiple Scenario Forecast for Residential Energy Demands

Yu Fujimoto

2015 JST-NSF-DFG-RCN Workshop on Distributed Energy Management Systems2015/04

Detail

Venue:Arlington, VA, USA

Development of Methodologies for Collaborative Energy Management System Using Simulation Model and Distribution NW Simulator

Yasuhiro Hayashi

2015 JST-NSF-DFG-RCN Workshop on Distributed Energy Management Systems2015/04

Detail

Venue:Arlington, VA, USA

Determination Method of Voltage Control Parameters Based on Input-output Relationship Database in Distribution System

Shinya Yoshizawa

2015 JST-NSF-DFG-RCN Workshop on Distributed Energy Management Systems2015/04

Detail

Venue:Arlington, VA, USA

Robust Operation Planning Method for Integrated Solid Oxide Fuel Cells Under Uncertainty of Demand

Runa Kato, Yu Fujimoto, Yasuhiro Hayashi

International Renewable Energy Congress 2015 (IREC' 2015)2015/03

Detail

Venue:El Mouradi Palace Sousse, Tunisia

The Basic Study for Development of a Method for Determining the LDC Parameters of LRT and SVR Using PV Output Forecasting

Shunsuke Kawano,Shinya Yoshizawa,Yu Fujimoto and Yasuhiro Hayashi

The IEEE PES Conference on Innovative Smart Grid Technologies(2015 ISGT)2015/02

Detail

Venue:Washington DC, USA

Method for Determining Line Drop Compensator Control Parameters of Low-Voltage Regulator Using Random Fores

Hiroshi Kikusato,Naoyuki Takahashi, Jun Yoshinaga,Yu Fujimoto,Yasuhiro Hayashi, Shinichi Kusagawa and Noriyuki Motegi

2014 3rd International Conference on Power Science and Engineering(ICPSE 2014)2014/12

Detail

Venue:Barcelona, Spain

Maximum PV Penetration Capacity Evoluation of a Novel Method for Determining LDC Control Parameters of Step Voltage Regulators

Shunsuke Kawano,Shinya Yoshizawa,Yu Fujimoto and Yasuhiro Hayashi

2014 3rd International Conference on Power Science and Engineering(ICPSE 2014)2014/12

Detail

Venue:Barcelona, Spain

Basic Study of Voltage Control Method with Demand Response

Satoru Akagi, Jun Yoshinaga,Yasuhiro Hayashi

The 6th World Conference on Photovoltaic Energy Conversion(WCPEC)2014/11

Detail

Venue:Kyoto International Conference Center, Kyoto

Evaluation of the Effectiveness of Voltage Control Methods using Acceptable Amount of PV Installation

Ryo Takahashi , Ryunosuke Miyoshi , Naoyuki Takahashi and Yasuhiro Hayashi

The 6th World Conference on Photovoltaic Energy Conversion(WCPEC)2014/11

Detail

Venue:Kyoto International Conference Center, Kyoto, Japan

Dynamic control method based on JIT for LVR in Distribution Systems

Naoyuki Takahashi, Hiroshi Kikusato , Jun Yoshinaga, Yasuhiro,Shinichi Kusagawa, Noriyuki Motegi

The 6th World Conference on Photovoltaic Energy Conversion(WCPEC)2014/11

Detail

Venue:Kyoto International Conference Center, Kyoto, Japan

Fluctuation Range Prediction of PV Output by Using Just-In-Time Modeling

Hayato Homma, Tomohide Yamazaki, Shinya Yoshizawa, Hiroshi Kikusato, Shinji Wakao, Yu Fujimoto, and Yasuhiro Hayashi

The 6th World Conference on Photovoltaic Energy Conversion(WCPEC)2014/11

Detail

Venue:Kyoto International Conference Center, Kyoto, Japan

A Basic Study of Distribution Automation for Service Restoration in a Distribution System with Distributed Generators

Shunsuke Kawano,Y,Hayashi

The 6th International Conference on Renewable and Distributed Energy Resources(IRED 2014)2014/11

Detail

Venue:Kyoto International Conference Center,Kyoto,Japan

Advanced Voltage Control Method of Multipke Step Voltage Regulators in Distribution Feeder

Shinya Yoshizawa,Y.Hayashi

The 6th International Conference on Renewable and Distributed Energy Resources(IRED 2014)2014/11

Detail

Venue:Kyoto International Conference Center,Kyoto,Japan

Demonstrations of Communication Standards for Demand Response and Smart House

Jun Yoshinaga, Wataru Hirohashi, Yasuhiro Hayashi

The 6th International Conference on Renewable and Distributed Energy Resources(IRED 2014)2014/11

Detail

Venue:Kyoto International Conference Center,Kyoto,Japan

On Detection of Cyber Attacks Against Voltage Control in Distribution Power Grids

Yasunori Isozaki, Shinya Yoshizawa, Yu Fujimoto, Hideaki Ishii, Isao Ono Takashi Onoda, and Yasuhiro Hayashi

IEEE International Conference on Smart Grid Communications2014/11

Detail

Venue:Venice, Italy

Method for Instantly Determining Line Drop Compensator Parameters of Low-Voltege Regulator Multiple Classfiers

Hiroshi Kikusato,Naoyuki Takahashi,Jun Yoshinaga,Yu Fujimoto,Yasuhiro Hayashi,Shinichi Kusagawa, Noriyuki Motegi

IEEE ISGT Europe 2014 in Istanbul2014/10

Detail

Venue:Istanbul, Turkey

PV OUTPUT PREDICTION UNDER VARIOUS CONDITIONS OF TIME AND SPATIAL RESOLUTIONS BY JUST-IN-TIME MODELING

Hayato HOMMA, Tomohide YAMAZAKI, Shinya YOSHIZAWA, Hiroshi KIKUSATO, Shinji WAKAO, Yu FUJIMOTO, Yasuhiro HAYASHI

The 29th European PV Solar Energy Conference and Exhibition2014/09

Detail

Venue:Amsterdam, The Netherlands

PV Output Prediction under Various Conditions of Time and Spatial Resolutions by Just-In-Time Modeling

Hayato Homma, Shinya Yoshizawa, Hiroshi Kikusato, Shinji Wakao, Yu Fujimoto, and Yasuhiro Hayashi

The 29th European PV Solar Energy Conference and Exhibition (EUPVSE2014)2014/09

Detail

Venue:Amsterdam, The Netherlands

VOLTAGE CONTROL AND ISSUES IN JAPAN

Yoshinaga Jun

CIGRE 2014,CIGRE C6 WG C6.302014/08

Detail

Venue:Paris, France

Voltage Control of Multiple Step Voltage Regulators by Renewing Control Parameters

Shinya Yoshizawa, Yuya Yamamoto, Jun Yoshinaga, Yasuhiro Hayashi, Shunsuke Sasaki, Takaya Shigetou, Hideo Nomura

18th Power Systems Computation Conference (PSCC 2014)2014/08

Detail

Venue:Wroclaw, Poland

Experiment with an OPF Controller Based on HPSO-TVAC for a PV-Supplied Microgrid with BESS

Khoa Le Dinh, Yasuhiro Hayashi

IEEE Power & Energy Society General Meeting 2014, (The 2014 IEEE PES)2014/07

Detail

Venue:Washington DC, USA

DEVELOPMENT OF DYNAMIC REACTIVE-POWER CONTROL METHOD WITH PV OUTPUT PREDICTION FOR SOLAR INVERTERS

Ryunosuke Miyoshi,Yasuhiro Hayashi

Grand Renewable Energy 2014 International Conference2014/07

Detail

Venue:Tokyo, Japan

Home Energy Management Based on Bayesian Network Considering Resident Convenience

Tomoaki Shoji, Wataru Hirohashi, Yasuhiro Hayashi

13th International Conference on Probabilistic Methods Applied to Power Systems(PMAPS2014)2014/07

Detail

Venue:Durham, England

Interval Forecasting of Photovoltaic Generation Based on Quantile Regression

Genta Kikuchi, Yu Fujimoto, Yasuhiro Hayashi, Yoshikane Kojima and Shunji Nakao

INTERNATIONAL WORK-CONFERENCE ON TIME SERIES ANAALYSIS (ITISE2014)2014/06

Detail

Venue:Granada.Spain

Effectiveness of Optimization Updating the Control Parameters of Advanced SVRs

Yuya Yamamoto, Shinya Yoshizawa, Jun Yoshinaga, Yasuhiro Hayashi, Shunsuke Sasaki, Takaya Shigeto, Hideo Nomura

The International Conference on Electrical Engineering 2014(ICEE 2014)2014/06

Detail

Venue:Ramada Plaza Jeju Hotel,Korea

Determination Method of the Configuration Minimizing Yearly Loss

Yuji Takenobu, Shunsuke Kawano, Yasuhiro Hayashi, Norihito Yasuda, Shin-ich Minato

The International Conference on Electrical Engineering 2014(ICEE 2014)2014/06

Detail

Venue:Ramada Plaza Jeju Hotel,Korea

The Basic Study for Accelerating a Voltage Calculation Method for High-and Low- voltage Distribution System

Shunsuke Kawano, Yasuhiro Hayashi, Nobuhiko Itaya, Tomihiro Takano, Tetsufumi Ono

The International Conference on Electrical Engineering 2014(ICEE 2014)2014/06

Detail

Venue:Ramada Plaza Jeju Hotel,Korea

Home Energy Management based on Bayesian Network considering Priority of Home Appliances

Tomoaki Shoji, Wataru Hirohashi, Yu Fujimoto, Yoshiharu Amano, Shin-ichi Tanabe, Yasuhiro Hayashi

The International Conference on Electrical Engineering 2014(ICEE 2014)2014/06

Detail

Venue:Ramada Plaza Jeju Hotel,Korea

A Novel Grid Energy Management System in Distribution System with PVs

Shinya Yoshizawa, Hayato Homma, Yu Fujimoto, Shinji Wakao, Yasuhiro Hayashi

The International Conference on Electrical Engineering 2014(ICEE 2014)2014/06

Detail

Venue:Ramada Plaza Jeju Hotel,Korea

Basic Study on Dynamic Reactive-Power Control Method with PV Output Prediction for Solar Inverter

Ryunosuke Miyoshi, Naoyuki Takahashi, Yasuhiro Hayashi

The International Conference on Electrical Engineering 2014(ICEE 2014)2014/06

Detail

Venue:Ramada Plaza Jeju Hotel,Korea

Centralized Voltage Control Method using Voltage Sensitivity Estimation in Distribution System with Mega-solar System

Ryo Takahashi, Naoyuki Takahashi, Yasuhiro Hayashi

The International Conference on Electrical Engineering 2014(ICEE 2014)2014/06

Detail

Venue:Ramada Plaza Jeju Hotel,Korea

Dynamic Control Method for LVR based on Predictive and Dynamic Controller

Naoyuki Takahashi, Hiroshi Kikusato, Jun Yoshinaga, Yasuhiro Hayashi, Shinichi Kusawagawa, Noriyuki Motegi

The International Conference on Electrical Engineering 2014(ICEE 2014)2014/06

Detail

Venue:Ramada Plaza Jeju Hotel,Korea

Multi-objective control method of battery Energy storage system for distribution system

Jun Yoshinaga, Satoshi Akagi Mikihiko Wada Yasuhito Isoe, Wataru Hirohashi and Yasuhiro Hayashi

CIRED Workshop 20142014/06

Detail

Venue:Rome, Italy

Optimal BESS Placement and Sizing based on HPSO-TVAC to Stabilize Voltage in PV- Supplied Micro-grid

Khoa Le Dinh, Yasuhiro Hayashi

The International Conference on Electrical Engineering 2014(ICEE 2014)2014/06

Detail

Venue:Ramada Plaza Jeju Hotel,Korea

Verification of Efficiency of Searching Methods Determining Optimal Control Parameters of Advanced SVRs

Yuya Yamamoto,Shinya Yoshizawa, Jun Yoshinaga, Yasuhiro Hayashi, Shunsuke Sasaki, Takaya Shigetou, Hideo Nomura

ENERGYCON 20142014/05

Detail

Venue:Dubrovnik,Croatia

Method for Determining Line Drop Compensator Parameters of Low Voltage Regulator using Support Vector Machine

Hiroshi Kikusato, Naoyuki Takahashi, Jun Yoshinaga, Yu Fujimoto and Yasuhiro Hayashi,Shinichi Kusagawa and Noriyuki Motegi

Innovative Smart Grid Technologies Conference (ISGT), 2014 IEEE PES2014/02

Detail

Venue:Washington, DC, USA

Dyanamic Voltage Control Method and Optimization for LVR in Distribution System with PV Systems

Naoyuki TAKAHASHI, Hiroshi KIKUSATO,Jun YOSHINAGA and Yasuhiro HAYASHI,Shinichi KUSAKAWA and Noriyuki MOTEGI

Innovative Smart Grid Technologies Conference (ISGT), 2014 IEEE PES2014/02

Detail

Venue:Washington, DC, USA

Novel Voltage Control of Multiple Step Voltage Regulators in a Distribution System

Shinya Yoshizawa, Yuya Yamamoto, Jun Yoshinaga and Yasuhiro Hayashi,Shunsuke Sasaki, Takaya Shigetou and Hideo Nomura

Innovative Smart Grid Technologies Conference (ISGT), 2014 IEEE PES2014/02

Detail

Venue:Washington, DC, USA

Development of Technology for Collaborative Energy Management System and Foundation for Versatile Demonstrative Research and Its Evaluation

Yu Fujimoto, Shinya Yoshizawa and Yasuhiro Hayashi

2014 Joint JST-NSF-DFG Workshop Distributed Energy Management Systems2014/01

Detail

Venue:Hawaii, USA

VOLTAGE CONTROL METHOD WITH THE AMOUNT OF DEMANDE RESPONSE REDUTION

Satoru Akagi, Jun Yoshinaga, Naoyuki Takahashi, Shunsuke Kawano, Ryunosuke Misyoshi and Yasuhiro Hayashi

2014

Online Optimal Power Flow Based on HPSO-TVAC Coordinates  with Centralized BESS and LRT Control to Stabilize Voltage in a  PV-Supplied Micro-grid

Khoa Le Dinh and Yasuhiro Hayashi

IEEE ISGT Europe 2013(ISGT)2013/10

Detail

Venue:Copenhagen, Denmark

Optimized Voltage Control in Distribution System with PV Using Advanced Analog Simulator

N. Takahashi, A. Otsubo, Y. Hayashi

CIGRE SC C6 COLLOQUIUM 20132013/10

Detail

Venue:Yokohama, Japan

Photovoltaic Output Prediction Based on a Collection of Quantile Regression Models

Genta KIKUCHI ,Yu FUJIMOTO , Yasuhiro HAYASHI , Yoshikane KOJIMA, Shunji NAKAO

the 23rd International Photovoltaic Science and Engineering Conference2013/10

Detail

Venue:Taipei,Taiwan

Evaluation of the Effect of Solar Inverters Installed with Different Reactive Power Control Systems Types on the Distribution System

Miyoshi Ryunosuke , Ryo Takahashi , Naoyuki Takahashi , Yasuhiro Hayashi , Shuichi Ashidate

the 23rd International Photovoltaic Science and Engineering Conference2013/10

Detail

Venue:Taipei,Taiwan

Coordinated BESS Control to Improve Voltage Stability of PV-Supplied Microgrid

Khoa Le Dinh and Yasuhiro Hayashi

48th International Universities' Power Engineering Conference(UPEC 2013 Dublin)2013/09

Evaluating the Ability of Hydroelectric Power Generation for Controlling Frequency with a Large Introduction of Wind Power Generation

Yu Matsumoto, Yasuhiro Hayashi, Tsuyoshi Tanaka

the 45th North American Power Symposium (NAPS)2013/09

Detail

Venue:New York, USA

Evaluation of a Cooperative Control Method for Electric Vehicles and Heat Pumps in Residential Photovoltaic Power Systems

KENTA YAMAMOTO, NAOYUKI TAKAHASHI, YU FUJIMOTO, YASUHIRO HAYASHI

The International Conference on Electrical Engineering (ICEE) 20132013/07

Detail

Venue:XIAMEN,CHINA

Evaluation of Improvement Effect of Voltage Quality by Reactive Power Control with Available Capacity of Residential FC Invertor

Shoichi Koinuma, Yasuhiro Hayashi, Yu Fujimoto, Takao Shinji, Yosuke Watanabe, Masayuki Tadokoro

The International Conference on Electrical Engineering (ICEE) 20132013/07

Detail

Venue:XIAMEN,CHINA

Centralized BESS Control to Minimize Demand of PV-Supplied Micro-grid under Voltage Constraints

Le Dinh Khoa,Hayashi Yasuhiro

IEEE International Power and Energy Conference(PECON2012)2012/12

Detail

Venue:Kota Kinabalu, Malaysia

Verification of Loss Reduction Effect on Loss Minimum Configuration of Distribution System by Zero-Suppressed Binary Decision Diagram

Takayuki Watanabe,Yu Fujimoto,Yasuhiro Hayashi

IEEE PES Innovative Smart Grid Technologies(ISGT)2013 Conference2012/12

Detail

Venue:Washington D.C., USA

Weather-Based Planning and Operation for Residential PV Systems and Storage Batteries

Ryota Suzuki, Yu Fujimoto, Yasuhiro Hayashi

IEEE International Power and Energy Conference(PECON2012)2012/12

Detail

Venue:Kota Kinabalu, Malaysia

Optimization of Fuel Cell System Operation Plans in Houses with PV Systems

Y. Taniguchi,Y. Fujimoto Y. Hayashi

IEEE International Power and Energy Conference(PECON2012)2012/12

Detail

Venue:Kota Kinabalu, Malaysia

Pattern Sequence-based Energy Demand Forecast Using Photovoltaic Energy Records

Yu Fujimoto, Yasuhiro Hayashi

International Conference on Renewable Energy Research and Applications(ICRERA)2012/11

Detail

Venue:Nagasaki, Japan

Automatic Extraction of Basic Electricity Consumption Pattern in Households

Haoyang Shen, Hideitsu Hino, Noboru Murata, Shinji Wakao,Yasuhiro Hayashi

International Conference on Renewable Energy Research and Applications(ICRERA2012/11

Detail

Venue:Nagasaki, Japan

Evaluating Improved Generation Efficiency: One Year Using Residential PV Voltage Control With a Clustered Residential Grid-interconnected PV

Yusuke Miyamoto,Yasuhiro Hayashi

IEEE PES ISGT Europe 20122012/10

Detail

Venue:Berlin, Germany

Centralized Voltage Control Method of Load Ratio Control Transformer and Step Voltage Regulator for Bank Fault Restoration

S. Yoshizawa, Y. Hayashi, M. Tsuji, and E. Kamiya

IEEE PES ISGT Europe 20122012/10

Detail

Venue:Berlin, Germany

Centralized Voltage Control Method Using Plural D-STATCOM with Controllable Dead Band in Distribution System with Renewable Energy

N.Takahashi, and Y.Hayashi

IEEE PES ISGT Europe 20122012/10

Detail

Venue:Berlin, Germany

A National Project on Optimal Control and Demonstration of the Japanese Smart Grid for Massive Integration of Photovoltaic Systems

Akihiko Yokoyama, Hirofumi Akagi, Yasuhiro Hayashi, Kazuhiko Ogimoto, Hideo Ishii

IEEE PES ISGT Europe 20122012/10

Detail

Venue:Berlin, Germany

Design of Electric Power distribution networks using a biologically inspired algorithm

S.Watanabe, A. Takamatsu, , Y. Hayashi

1st International Conference on the Theory and Practiec of Natural Computing2012/10

Detail

Venue:Tarragona, Spain

Experimental verification of advanced voltage control for penetration of PV in distribution system with IT sectionalizing switches

Y. HAYASHI, N. TAKAHASHI, Y. HANAI, E. KAMIYA, T. WATANABE, H. ISHII

2012 CIGRE2012/08

Detail

Venue:Paris, France

Voltage Control Method of LRT and SVR in Distribution System with PV systems corresponding to Bank Fault Restoration

YOSHIZAWA, Shinya and HAYASHI, Yasuhiro, TSUJI, Masaki and KAMIYA, Eiji

The International Conference on Electrical Engineering 2012 (ICEE2012)2012/07

Detail

Venue:Kanazawa, Japan

Evaluation of Voltage Control Effect for Data Acquisition Period Length from SCADA with IT Switches

UDAGAWA, Tsuyoshi HAYASHI, Yasuhiro and TAKAHASHI, Naoyuki, MATSUURA,Yasuo MORITA, Tomohiko and MINAMI, Masahiro

The International Conference on Electrical Engineering 2012 (ICEE2012)2012/07

Detail

Venue:Kanazawa, Japan

Voltage Control Method Using Centralized Control of Dead Band of D-STATCOM in Distribution System with Renewable Energy

TAKAHASHI, Naoyuki and HAYASHI, Yasuhiro

The International Conference on Electrical Engineering 2012 (ICEE2012)2012/07

Detail

Venue:Kanazawa, Japan

Autonomous Control of Heat Pump Water Heater for Avoidance of PV Output Suppression

SHINJO, Takayuki and HAYASHI, Yasuhiro, MIYAMOTO, Yusuke

The International Conference on Electrical Engineering 2012 (ICEE2012)2012/07

Detail

Venue:Kanazawa, Japan

Evaluation of Sectionalizing Switch Control under Centralized Voltage Control Condition in Distribution System with PV

OTSUBO, Atsushi TAKAHASHI, Naoyuki and HAYASHI, Yasuhiro

The International Conference on Electrical Engineering 2012 (ICEE2012)2012/07

Detail

Venue:Kanazawa, Japan

Evaluation of CO2 Emission and Primary Energy Consumption Considering Variation in Demand for Collective Housing with Fuel Cells

KAMEDA, Manato, FUJIMOTO, Yu and HAYASHI, Yasuhiro

The International Conference on Electrical Engineering 2012 (ICEE2012)2012/07

Detail

Venue:Kanazawa, Japan

Basic Study on Optimum Control Method of Storage Battery for Reduction of Output Suppression in Distribution System Including Clustered PV Systems

FUJIMORI, Taro and HAYASHI, Yasuhiro, MIYAMOTO, Yusuke

The International Conference on Electrical Engineering 2012 (ICEE2012)2012/07

Detail

Venue:Kanazawa, Japan

Cooperative Power Quality Control by Photovoltaic Systems

S. Kawasaki, M. Tanaka, H. Taoka, J. Matsuki, and Y. Hayashi

IEEE PES Conference on Innovative Smart Grid Technologies (ISGT Asia 2011)2011/11

Detail

Venue:Perth, Australia

Optimization of Reactive Power Control of Clustered Residential Grid-Interconnected PV Systems

Y. Miyamoto, Y. Hayashi

21st International Photovoltaic Science and Engineering Conference(PVSEC-21)2011/11

Detail

Venue:Fukuoka, Japan

Voltage Estimation and Control of Distribution Feeders with Distributed Generationd Using It Switches Data

S. Takahashi and Y. Hayashi

21st International Photovoltaic Science and Engineering Conference(PVSEC-21)2011/11

Detail

Venue:Fukuoka, Japan

Voltage Control Method Using Statcom with Variable Dead Band Installed Weight Coefficient In Distribution Systems with PV System

N. Takahashi and Y. Hayashi

21st International Photovoltaic Science and Engineering Conference(PVSEC-21)2011/11

Detail

Venue:Fukuoka, Japan

Distribution Line Structure and Generation Efficiency Improvement: a Clustered Residential Grid-Interconnected PV

Y. Miyamoto, Y. Hayashi

the 17th Power Systems Computation Conference (PSCC'11)2011/08

Detail

Venue:Stockholm, Sweden

Cooperative Voltage Control and Improvement of Voltage Imbalance by STATCOMs in Response to Extensive Interconnection with Distribution System of Renewable Energy Resources

S. Kawasaki, Y. Hayashi and N. Takahashi

the 17th Power Systems Computation Conference (PSCC'11)2011/08

Detail

Venue:Stockholm, Sweden

Three-Phase Short-Circuit Fault Locator in Loop Shaped Distribution System with Inverter Based Distributed Generations

D. Iioka, Y. Hayashi

the 17th Power Systems Computation Conference (PSCC'11)2011/08

Detail

Venue:Stockholm, Sweden

Evaluating improved generation efficiency: One year using residential PV voltage control with a clustered residential grid-interconnected PV

Y. Miyamoto, Y. Hayashi

IEEE Power & Energy Society General Meeting2011/07

Detail

Venue:Michigan, USA

Measured Impedance at Incoming Feeder of Distributed Resources Interconnected to Loop-Shaped Distribution System

D.Iioka, Y.Hayashi

IEEE Power & Energy Society General Meeting2011/07

Detail

Venue:Michigan, USA

Evaluation of Optimal Operation of Residential PEFC System with Exhaust Heat Use for Heating and Hot Water

Y. Taniguchi, Y. Hayashi

17th International Conference on Electrical Engineering (ICEE)2011/07

Detail

Venue:Hong Kong

Verifying the Avoidance Output Suppression Loss Effect: Residential PV Reactive Power Control of a Clustered Residential Grid-interconnected PV System

Y. Miyamoto, Y. Hayash

17th International Conference on Electrical Engineering (ICEE)2011/07

Detail

Venue:Hong Kong

Reduction Effect of Output Suppression by Time-shifting the Load of Heat Pump Boiler for Clustered Residential Grid-interconnected Photovoltaic Power Systems

T. Shinjo, Y. Hayashi, Y. Miyamoto

17th International Conference on Electrical Engineering (ICEE)2011/07

Detail

Venue:Hong Kong

Verification of Effect on Reduction of Output Suppression by Introducing Storage Battery for Residential Section Including Clustered Photovoltaic Power Systems

T. Fujimori, Y. Hayashi, Y. Miyamoto

17th International Conference on Electrical Engineering (ICEE)2011/07

Detail

Venue:Hong Kong

Evaluation of Voltage Control Method in Distribution System with PV Systems during Bank Fault Restoration

S. Yoshizawa, Y. Hayashi

17th International Conference on Electrical Engineering (ICEE)2011/07

Detail

Venue:Hong Kong

Determination Method of Optimal Allocation of SVR in Distribution Feeders with Renewable Energy Sources

S. Takahashi, Y. Hayashi, Y. Tsuji, E. Kamiya

17th International Conference on Electrical Engineering (ICEE)2011/07

Detail

Venue:Hong Kong

Autonomous Decentralized Voltage Control Using Available Capacity of Fuel Cell Systemunder High Penetration of PV System

S. Sano, Y. Hayashi, T. Shinji, S. Tsujita

17th International Conference on Electrical Engineering (ICEE)2011/07

Detail

Venue:Hong Kong

Minimum Required Available Capacity of Clustered Gas Engine Systems for Compensation of Output Fluctuation of PV Systems

S. Hoshina, Y. Hayashi

17th International Conference on Electrical Engineering (ICEE)2011/07

Detail

Venue:Hong Kong

Optimal Cooperated Planning and Operation of Residential PV System and Battery Energy Storage System

R. Suzuki, Y. Hayashi

17th International Conference on Electrical Engineering (ICEE)2011/07

Detail

Venue:Hong Kong

Voltage Control Method Using Plural STATCOMs with Variable Dead Band for Penetration of Photovoltaic Generation System

N. Takahashi, Y. Hayashi

17th International Conference on Electrical Engineering (ICEE)2011/07

Detail

Venue:Hong Kong

Improvement of Power Quality in Distribution System by Cooperative Control of Power Conditioner Systems

M. Tanaka, S. Kawasaki, H. Taoka, J. Matsuki, and Y. Hayashi

17th International Conference on Electrical Engineering (ICEE)2011/07

Detail

Venue:Hong Kong

Evaluation of Reduction Effect of Inverter Capacity by Cooperation of Binary Control and Storage Battery in Clustered Residential PV Systems

K. Murahashi, Y. Hayashi, T. Hayashi, Y. Okuno, T. Funahashi

17th International Conference on Electrical Engineering (ICEE)2011/07

Detail

Venue:Hong Kong

Optimal Allocation of Plural SVCs for PV Penetration

K. Konishi, Y. Hayashi

17th International Conference on Electrical Engineering (ICEE)2011/07

Detail

Venue:Hong Kong

Experimental Analysis on Influences of Harmonic Voltage at High-Voltage Network on Harmonic Current at Medium-Voltage Network

J. Inagaki, Y. Hayashi, Y. Tada

17th International Conference on Electrical Engineering (ICEE)2011/07

Detail

Venue:Hong Kong

Optimal Generation Output Dispatch to Minimize Transmission Congestion and Loss for Frequency Deviation by Renewable Energy Sources

H. Suzuki, Y. Hayashi, T. Tanaka

17th International Conference on Electrical Engineering (ICEE)2011/07

Detail

Venue:Hong Kong

Evaluation of Optimal Capacity of Residential Storage Battery to Smooth Output of PV Systems in Low-voltage Distribution System

H. Sugiura, S. Kawasaki, and Y. Hayashi

17th International Conference on Electrical Engineering (ICEE)2011/07

Detail

Venue:Hong Kong

Dependence of Distribution Line Loss on Real and Reactive Power of Home Appliances

D.Iioka, Y.Hayashi

17th International Conference on Electrical Engineering (ICEE)2011/07

Detail

Venue:Hong Kong

Network Configuration Study of FRIENDS from a View Point of Service Reliability

Koichi Nara, Yasuhiro Hayashi

International Conference on Electrical Engineering 19981998/08

Patent

Reference Number:1123

多数台連系した太陽光発電システムの出力抑制回避方法及びその装置(日本)

林 泰弘

2010-215571、2012- 70598、5612417

Reference Number:1238

昼食製造設備における電力供給システム(日本)

林 泰弘

2011-186793、2013- 51746、5662285

Reference Number:1940

配電系統システム(日本)

林 泰弘

2007- 61986、2008-228428、4758375

Reference Number:1941

分散型電源を配電ネットワークに連系する際の条件を決定する支援システムおよびプログラム(日本)

林 泰弘

2006- 32312、2007-215314、4742238

Reference Number:1943

配電網構成出力装置、方法、及びプログラム(日本)

林 泰弘, 竹延 祐二

2017-154231、2019- 33619

Reference Number:1959

配電系統構成最適化装置および配電系統構成最適化方法(日本)

林 泰弘

2005-025550、2006-217689、4424494

Reference Number:1960

分散型電源を配電ネットワークに連系する際の条件を決定する支援システム及び支援方法(日本)

林 泰弘

2005-297755、2007-110809、4577841

Reference Number:2043

圧縮空気貯蔵発電方法(日本)

林 泰弘

2018- 60576、2019-173608

Reference Number:2047

電力管理システム及びプログラム(日本)

林 泰弘

2018-040227、2019- 80487

Reference Number:2211

消費電力推定装置および消費電力推定方法(日本)

藤本 悠, 林 泰弘

2019-111609、2020-205684

Research Grants & Projects

Grant-in-aids for Scientific Research Adoption Situation

Research Classification:

Research on Coordinate Voltage control Method Using LRT/SVR and SVC

Allocation Class:¥4680000

Research Classification:

Study on Harmonic Analysis of Distribution Network Connected Distributed Generators

Allocation Class:¥4550000

Research Classification:

Configuration of Multi-Agent Based Self-Healing Electric Power System and Its Operation

Allocation Class:¥8700000

Research Classification:

Research on Evaluation of Dispersed Generations Installed in Distribution Systems

Allocation Class:¥3200000

Research Classification:

RESEARCH FOR EVALUATION METHOD OF FLEXIBILITY OF ELECTRICAL POWER SYSTEMS PLANNING

Allocation Class:¥1800000

Research Classification:

Economic and Environmental Evaluation Method and Suitable Location Map for the Bifacial Photovoltaic Modules

2019/-0-2022/-0

Allocation Class:¥4290000

Research Classification:

Hybrid model analysis method with data model and physical model for automatic energy analysis

2020/-0-2023/-0

Allocation Class:¥4290000

Lecture Course

Course TitleSchoolYearTerm
Basic Experiments in Science and Engineering 2B DenseiSchool of Advanced Science and Engineering2020spring semester
Basic Experiments in Science and Engineering 2B DenseiSchool of Advanced Science and Engineering2021spring semester
Frontiers of Electrical Engineering and BioscienceSchool of Advanced Science and Engineering2020spring semester
Frontiers of Electrical Engineering and BioscienceSchool of Advanced Science and Engineering2021spring semester
Frontiers of Electrical Engineering and Bioscience [S Grade]School of Advanced Science and Engineering2020spring semester
Frontiers of Electrical Engineering and Bioscience [S Grade]School of Advanced Science and Engineering2021spring semester
Laboratory B on Electrical Engineering and Bioscience (A)School of Advanced Science and Engineering2020spring semester
Laboratory B on Electrical Engineering and Bioscience (A)School of Advanced Science and Engineering2021spring semester
Laboratory B on Electrical Engineering and Bioscience (B)School of Advanced Science and Engineering2020spring semester
Laboratory B on Electrical Engineering and Bioscience (B)School of Advanced Science and Engineering2021spring semester
Laboratory B on Electrical Engineering and Bioscience [S Grade]School of Advanced Science and Engineering2020spring semester
Laboratory B on Electrical Engineering and Bioscience [S Grade]School of Advanced Science and Engineering2021spring semester
Laboratory B on Electrical Engineering and Bioscience [S Grade]School of Advanced Science and Engineering2020spring semester
Laboratory B on Electrical Engineering and Bioscience [S Grade]School of Advanced Science and Engineering2021spring semester
Laboratory C on Electrical Engineering and BioscienceSchool of Advanced Science and Engineering2020fall semester
Laboratory C on Electrical Engineering and BioscienceSchool of Advanced Science and Engineering2021fall semester
Laboratory C on Electrical Engineering and Bioscience [S Grade]School of Advanced Science and Engineering2020fall semester
Laboratory C on Electrical Engineering and Bioscience [S Grade]School of Advanced Science and Engineering2021fall semester
Project Laboratory ASchool of Advanced Science and Engineering2020spring semester
Project Laboratory ASchool of Advanced Science and Engineering2021spring semester
Project Laboratory A [S Grade]School of Advanced Science and Engineering2020spring semester
Project Laboratory A [S Grade]School of Advanced Science and Engineering2021spring semester
Project Laboratory BSchool of Advanced Science and Engineering2020fall semester
Project Laboratory BSchool of Advanced Science and Engineering2021fall semester
Project Laboratory B [S Grade]School of Advanced Science and Engineering2020fall semester
Project Laboratory B [S Grade]School of Advanced Science and Engineering2021fall semester
Graduation Thesis ASchool of Advanced Science and Engineering2020spring semester
Graduation Thesis ASchool of Advanced Science and Engineering2021spring semester
Graduation Thesis A [S Grade]School of Advanced Science and Engineering2020spring semester
Graduation Thesis A [S Grade]School of Advanced Science and Engineering2021spring semester
Graduation Thesis BSchool of Advanced Science and Engineering2020fall semester
Graduation Thesis BSchool of Advanced Science and Engineering2021fall semester
Graduation Thesis B [Spring]School of Advanced Science and Engineering2020spring semester
Graduation Thesis B [Spring]School of Advanced Science and Engineering2021spring semester
Graduation Thesis B [S Grade]School of Advanced Science and Engineering2020fall semester
Graduation Thesis B [S Grade]School of Advanced Science and Engineering2021fall semester
Graduation Thesis B [Spring] [S Grade]School of Advanced Science and Engineering2020spring semester
Graduation Thesis B [Spring] [S Grade]School of Advanced Science and Engineering2021spring semester
Electrical Energy System and EnvironmentSchool of Advanced Science and Engineering2020spring semester
Electrical Energy System and EnvironmentSchool of Advanced Science and Engineering2021spring semester
Graduation Thesis ASchool of Advanced Science and Engineering2020fall semester
Graduation Thesis ASchool of Advanced Science and Engineering2021fall semester
Graduation Thesis BSchool of Advanced Science and Engineering2020spring semester
Graduation Thesis BSchool of Advanced Science and Engineering2021spring semester
Advanced Electrical EngineeringSchool of Advanced Science and Engineering2020spring semester
Advanced Electrical EngineeringSchool of Advanced Science and Engineering2020spring semester
Advanced Electrical EngineeringSchool of Advanced Science and Engineering2021spring semester
Power Resource Optimization IGraduate School of Fundamental Science and Engineering2020an intensive course(spring and fall)
Power Resource Optimization IGraduate School of Creative Science and Engineering2020an intensive course(spring and fall)
Power Resource Optimization IGraduate School of Advanced Science and Engineering2020an intensive course(spring and fall)
Power Resource Optimization IGraduate School of Fundamental Science and Engineering2021an intensive course(spring and fall)
Power Resource Optimization IGraduate School of Creative Science and Engineering2021an intensive course(spring and fall)
Power Resource Optimization IGraduate School of Advanced Science and Engineering2021an intensive course(spring and fall)
Social Science for Energy InnovationGraduate School of Fundamental Science and Engineering2020spring semester
Social Science for Energy InnovationGraduate School of Creative Science and Engineering2020spring semester
Social Science for Energy InnovationGraduate School of Advanced Science and Engineering2020spring semester
Social Science for Energy InnovationGraduate School of Fundamental Science and Engineering2021spring semester
Social Science for Energy InnovationGraduate School of Creative Science and Engineering2021spring semester
Social Science for Energy InnovationGraduate School of Advanced Science and Engineering2021spring semester
Seminar on Power and Energy MaterialsGraduate School of Fundamental Science and Engineering2020an intensive course(spring and fall)
Seminar on Power and Energy MaterialsGraduate School of Creative Science and Engineering2020an intensive course(spring and fall)
Seminar on Power and Energy MaterialsGraduate School of Advanced Science and Engineering2020an intensive course(spring and fall)
Seminar on Power and Energy MaterialsGraduate School of Fundamental Science and Engineering2021an intensive course(spring and fall)
Seminar on Power and Energy MaterialsGraduate School of Creative Science and Engineering2021an intensive course(spring and fall)
Seminar on Power and Energy MaterialsGraduate School of Advanced Science and Engineering2021an intensive course(spring and fall)
Practical Seminar on Technological Excellence I (Electric power)Graduate School of Fundamental Science and Engineering2020an intensive course(spring and fall)
Practical Seminar on Technological Excellence I (Electric power)Graduate School of Creative Science and Engineering2020an intensive course(spring and fall)
Practical Seminar on Technological Excellence I (Electric power)Graduate School of Advanced Science and Engineering2020an intensive course(spring and fall)
Practical Seminar on Technological Excellence I (Electric power)Graduate School of Fundamental Science and Engineering2021an intensive course(spring and fall)
Practical Seminar on Technological Excellence I (Electric power)Graduate School of Creative Science and Engineering2021an intensive course(spring and fall)
Practical Seminar on Technological Excellence I (Electric power)Graduate School of Advanced Science and Engineering2021an intensive course(spring and fall)
Practical Seminar on Technological Excellence I (Energy material)Graduate School of Fundamental Science and Engineering2020an intensive course(spring and fall)
Practical Seminar on Technological Excellence I (Energy material)Graduate School of Creative Science and Engineering2020an intensive course(spring and fall)
Practical Seminar on Technological Excellence I (Energy material)Graduate School of Advanced Science and Engineering2020an intensive course(spring and fall)
Practical Seminar on Technological Excellence I (Energy material)Graduate School of Fundamental Science and Engineering2021an intensive course(spring and fall)
Practical Seminar on Technological Excellence I (Energy material)Graduate School of Creative Science and Engineering2021an intensive course(spring and fall)
Practical Seminar on Technological Excellence I (Energy material)Graduate School of Advanced Science and Engineering2021an intensive course(spring and fall)
Seminar on Business CreationGraduate School of Fundamental Science and Engineering2021an intensive course(spring)
Seminar on Business CreationGraduate School of Creative Science and Engineering2021an intensive course(spring)
Seminar on Business CreationGraduate School of Advanced Science and Engineering2021an intensive course(spring)
Power Resource Optimization IIGraduate School of Fundamental Science and Engineering2020an intensive course(spring and fall)
Power Resource Optimization IIGraduate School of Creative Science and Engineering2020an intensive course(spring and fall)
Power Resource Optimization IIGraduate School of Advanced Science and Engineering2020an intensive course(spring and fall)
Power Resource Optimization IIGraduate School of Fundamental Science and Engineering2021an intensive course(spring and fall)
Power Resource Optimization IIGraduate School of Creative Science and Engineering2021an intensive course(spring and fall)
Power Resource Optimization IIGraduate School of Advanced Science and Engineering2021an intensive course(spring and fall)
Practical Seminar on Technological Excellence II (Electric power)Graduate School of Fundamental Science and Engineering2020an intensive course(spring and fall)
Practical Seminar on Technological Excellence II (Electric power)Graduate School of Creative Science and Engineering2020an intensive course(spring and fall)
Practical Seminar on Technological Excellence II (Electric power)Graduate School of Advanced Science and Engineering2020an intensive course(spring and fall)
Practical Seminar on Technological Excellence II (Electric power)Graduate School of Fundamental Science and Engineering2021an intensive course(spring and fall)
Practical Seminar on Technological Excellence II (Electric power)Graduate School of Creative Science and Engineering2021an intensive course(spring and fall)
Practical Seminar on Technological Excellence II (Electric power)Graduate School of Advanced Science and Engineering2021an intensive course(spring and fall)
Practical Seminar on Technological Excellence II (Energy material)Graduate School of Fundamental Science and Engineering2020an intensive course(spring and fall)
Practical Seminar on Technological Excellence II (Energy material)Graduate School of Creative Science and Engineering2020an intensive course(spring and fall)
Practical Seminar on Technological Excellence II (Energy material)Graduate School of Advanced Science and Engineering2020an intensive course(spring and fall)
Practical Seminar on Technological Excellence II (Energy material)Graduate School of Fundamental Science and Engineering2021an intensive course(spring and fall)
Practical Seminar on Technological Excellence II (Energy material)Graduate School of Creative Science and Engineering2021an intensive course(spring and fall)
Practical Seminar on Technological Excellence II (Energy material)Graduate School of Advanced Science and Engineering2021an intensive course(spring and fall)
Master's Thesis (Department of Electrical Engineering and Bioscience)Graduate School of Advanced Science and Engineering2020full year
Research on Next-Generation Electrical Energy SystemsGraduate School of Advanced Science and Engineering2020full year
Research on Next-Generation Electrical Energy SystemsGraduate School of Advanced Science and Engineering2020full year
Research on Next-Generation Electrical Energy SystemsGraduate School of Advanced Science and Engineering2021full year
Research on Next-Generation Electrical Energy SystemsGraduate School of Advanced Science and Engineering2021full year
Advanced Electrical Energy SystemsGraduate School of Advanced Science and Engineering2020fall semester
Advanced Electrical Energy SystemsGraduate School of Advanced Science and Engineering2021fall semester
Advanced Seminar AGraduate School of Advanced Science and Engineering2020spring semester
Advanced Seminar AGraduate School of Advanced Science and Engineering2020spring semester
Advanced Seminar AGraduate School of Advanced Science and Engineering2021spring semester
Advanced Seminar AGraduate School of Advanced Science and Engineering2021spring semester
Advanced Seminar BGraduate School of Advanced Science and Engineering2020fall semester
Advanced Seminar BGraduate School of Advanced Science and Engineering2020fall semester
Advanced Seminar BGraduate School of Advanced Science and Engineering2021fall semester
Advanced Seminar BGraduate School of Advanced Science and Engineering2021fall semester
Seminar on Next-Generation Electrical Energy Systems AGraduate School of Advanced Science and Engineering2020spring semester
Seminar on Next-Generation Electrical Energy Systems AGraduate School of Advanced Science and Engineering2020spring semester
Seminar on Next-Generation Electrical Energy Systems AGraduate School of Advanced Science and Engineering2021spring semester
Seminar on Next-Generation Electrical Energy Systems AGraduate School of Advanced Science and Engineering2021spring semester
Seminar on Next-Generation Electrical Energy Systems BGraduate School of Advanced Science and Engineering2020fall semester
Seminar on Next-Generation Electrical Energy Systems BGraduate School of Advanced Science and Engineering2020fall semester
Seminar on Next-Generation Electrical Energy Systems BGraduate School of Advanced Science and Engineering2021fall semester
Seminar on Next-Generation Electrical Energy Systems BGraduate School of Advanced Science and Engineering2021fall semester
Seminar on Next-Generation Electrical Energy Systems CGraduate School of Advanced Science and Engineering2020spring semester
Seminar on Next-Generation Electrical Energy Systems CGraduate School of Advanced Science and Engineering2020spring semester
Seminar on Next-Generation Electrical Energy Systems CGraduate School of Advanced Science and Engineering2021spring semester
Seminar on Next-Generation Electrical Energy Systems CGraduate School of Advanced Science and Engineering2021spring semester
Seminar on Next-Generation Electrical Energy Systems DGraduate School of Advanced Science and Engineering2020fall semester
Seminar on Next-Generation Electrical Energy Systems DGraduate School of Advanced Science and Engineering2020fall semester
Seminar on Next-Generation Electrical Energy Systems DGraduate School of Advanced Science and Engineering2021fall semester
Seminar on Next-Generation Electrical Energy Systems DGraduate School of Advanced Science and Engineering2021fall semester
Master's Thesis (Department of Electrical Engineering and Bioscience)Graduate School of Advanced Science and Engineering2020full year
Research on Next-Generation Electrical Energy SystemsGraduate School of Advanced Science and Engineering2020full year
Research on Next-Generation Electrical Energy SystemsGraduate School of Advanced Science and Engineering2021full year
Research on Electrical Engineering and Bioscience A HAYASHI, YasuhiroGraduate School of Advanced Science and Engineering2020full year
Research on Electrical Engineering and Bioscience A HAYASHI, YasuhiroGraduate School of Advanced Science and Engineering2021full year
Energy Next Problem-Solving PracticeGraduate School of Fundamental Science and Engineering2020spring semester
Energy Next Problem-Solving PracticeGraduate School of Creative Science and Engineering2020spring semester
Energy Next Problem-Solving PracticeGraduate School of Advanced Science and Engineering2020spring semester
Energy Next Problem-Solving PracticeGraduate School of Advanced Science and Engineering2020spring semester
Energy Next Problem-Solving PracticeGraduate School of Fundamental Science and Engineering2021spring semester
Energy Next Problem-Solving PracticeGraduate School of Creative Science and Engineering2021spring semester
Energy Next Problem-Solving PracticeGraduate School of Advanced Science and Engineering2021spring semester
Energy Next Problem-Solving PracticeGraduate School of Advanced Science and Engineering2021spring semester
Laboratory Rotation AGraduate School of Advanced Science and Engineering2020full year
Laboratory Rotation AGraduate School of Advanced Science and Engineering2021full year
Laboratory Rotation BGraduate School of Advanced Science and Engineering2020full year
Laboratory Rotation BGraduate School of Advanced Science and Engineering2021full year
Advanced Electrical Engineering and Electronic Science B: Electrical EnergyGraduate School of Fundamental Science and Engineering2020fall quarter
Advanced Electrical Engineering and Electronic Science B: Electrical EnergyGraduate School of Creative Science and Engineering2020fall quarter
Advanced Electrical Engineering and Electronic Science B: Electrical EnergyGraduate School of Advanced Science and Engineering2020fall quarter
Advanced Electrical Engineering and Electronic Science B: Electrical EnergyGraduate School of Advanced Science and Engineering2020fall quarter

Teaching Methods And Education And Presentation on Practice, Lectures, etc.

Active Network Systems with Energy Resources”

2009/05

Detail

Outline:Spring conference of the KIEE power engineering section