Optimal Strategy of Photovoltaic-Storage Fast Charging Station Considering Characteristics of Electric Vehicles and PV Fluctuation

Electric vehicles (EVs) are the future development trend, and fast charging stations play an important role in the use of electric vehicles and significantly affect the distribution network owing to the fluctuation of their power. The large-scale integration of battery energy storage system (BESS) in the distribution network can not only improve the utilization rate of photovoltaic (PV) power generation, but also reduce the negative impact of the rapid charging behavior of electric vehicles. In this paper, a dynamic energy management system (EMS) with combined optimal strategy is proposed, considering the power real-time optimization of electric vehicles charging demand, photovoltaic absorption and peak shaving. The purpose of the study is to mitigate the effects of fast charging stations on the connected distribution network, at the same time maximize the profits of the charging station operator. The proposed energy management algorithm significantly reduces the peak demand of the grid by 35%, extending battery service life due to considering the charging and discharging allowance of the BESS.