Study on Voltage Regulation in Distribution System Using Electric Vehicles - Control Method Considering Dynamic Behavior

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.