A surge of needs for the low carbon society promotes a spread of electric vehicle (EV). EVs could be charged at night simultaneously, as a result, severe voltage drop may happen. The authors have proposed the method which can compensate the voltage drop caused by EV charging by means of adjusting charging schedules and controlling reactive power. And, we have confirmed the effectiveness of the method by estimating steady state in order to figure out the limitation of the control capability. In this paper, from a practical viewpoint, we propose the method to consider dynamic behavior. In this method, the EV can not only finish charging effectively but also control minimal reactive power to keep admissible voltage with monitoring system voltage.Keywords: Electric vehicleVoltage dropDistribution systemReactive power controlDispersed voltage control Additional informationNotes on contributorsYuki MitsukuriYuki Mitsukuri was born on February 14, 1979, in Japan. He received the M.E. degree from Hokkaido University, Sapporo, Japan in 2003. He joined Tokyo Electric Power Company (TEPCO) in April 2003. Since July, 2009, he had been enrolled in the R&D Center of TEPCO. In October 2010, he entered Ph.D program at Graduate School of Science and Information Technology, Hokkaido University, Japan. In March 2012, he resigned from the company. He received the Ph.D degree in 2013. In April 2013, he was appointed as an assistant professor at Hakodate National College of Technology. Currently, he engages in a planning, operation and control of distribution network with new distributed energy resources. He is a member of the IEE of Japan.Ryoichi HaraRyoichi Hara was born on August 10, 1974, in Japan. He received the Ph.D degree from Hokkaido University, Sapporo, Japan, in 2003. He was appointed as a Research Associate at Yokohama National University, Yokohama, Japan in 2003. In April 2006, he was appointed to his current position as an associate professor at Hokkaido University. His research interests are analysis, operation and control of electric power system. He is particularly interested in technological and economical harmonization of the bulk power system and distributed energy resources. Dr. Hara is a member of the Cigre, the IEE of Japan and the IEEE.Hiroyuki KitaHiroyuki Kita was born on May 7, 1963, in Japan. He received the M.E. degree from Hokkaido University, Sapporo, Japan, in 1988. He received the Ph.D degree from Hokkaido University in 1994. In April 1989, he was appointed as an Assistant Professor in the Department of Electrical Engineering, Hokkaido University. In July 2005, he was appointed as a professor, his current position. His research interests include the planning, analysis and control of electric power system. Dr. Kita is a member of the IEE of Japan and the IEEE.Keiichi WatanabeKeiichi Watanabe was was born on October 28, 1974, in Japan. He received the M.E. degree in electrical and electronic engineering from Tokyo Metropolitan Institute of Technology, Japan in 2000. He joined Tokyo Electric Power Company in April 2000. And he joined the Distribution Department. Since July 2012, he has been working for the Distribution Engineering group of TEPCO.Kenjiro MoriKenjiro Mori was born in February, 1974. He received the M.E degree from Nagoya University, Japan in 1998. He joined Tokyo Electric Power Company in April 1998. He has been enrolled in Distribution Department. Currently, he engages in study about sophistication of distribution grid, smart grid and smart meter.Yasuhiro KataokaYasuhiro Kataoka was born in Japan, on August 22, 1972. He received the M.E. degree in electrical and electronic engineering from Aoyama Gakuin University, Japan in 1998. He joined Tokyo Electric Power Company in April 1998. And he joined the Distribution Department. Since July 2008, he has been enrolled in the R&D Center. Currently, he engages in a study about the distribution network system. He is a member of the Institute of Electrical Engineers of Japan.Eiji KogureEiji Kogure was born on October 11, 1963, in Japan. He received the B.E. degrees in Saitama University, Saitama, Japan in 1987. He joined Tokyo Electric Power Company (TEPCO) in April 1987, and joined Distribution Department. Since July 2010, he has been enrolled in the R&D Center of TEPCO. He is particularly interested in research and survey electrical installation. Currently, he engages in research about distribution network system. He is a member of the Institute of Electrical Engineers of Japan and the Institute of Electrical Installation Engineers of Japan.Yuji MishimaYuji Mishima received Ph.D degree from Hokkaido University, Japan, in 1999. After his academic experience at Ibaraki University, Japan, he is currently an associate professor of Hakodate National College of Technology, Japan. His research interests include an optimization of planning and operation of power systems and power delivery systems.
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