직류 급전망 연계형 EV 충전설비를 위한 대용량 전원공급장치 효율 분석

초록

EV charging is implemented by two ways which are DC and AC on railway power grid. DC way is around 3% more efficient than AC way. However, DC way is too difficult to maintain constant voltage because it uses high voltage as 1500±500[V]. It is also considered that standard distribution voltage is recently inclined to be AC 200[V] - DC 400[V] or AC 380[V] - DC750[V]. According to this trend, it should be adopted as input voltage in DC charging system. Therefore, this paper is proposing a mass power supply way that can provide standard distribution voltage to EV charger on railway DC power grid. It is also demonstrating the most efficient EV charging way comparing modeling data of the way with existing ways.