Due to instability of PV power output,PV integration can readily cause voltage violation at points of common coupling (PCC)in distribution networks,largely limiting the development of PV generations.Energy storage system (ESS)has the ability of fast charging and discharging response,which can effectively solve the voltage fluctuation problem by absorbing and emitting power.This paper analyzes the mechanism of voltage violation upon PV integration and the principle of voltage regulation.It proposes an ESS control scheme which is based on power-voltage control,and which helps regulating voltage at the PCC in cooperation with PV inverter.The results show that the proposed scheme can effec-tively solve the problem of voltage violation.
关键词
储能/光伏/并网点/电压
Key words
energy storage/photovoltaic/point of common coupling/voltage
维普
万方数据