A Control Strategy of Energy Storage System Considering Time Sequence Matching Degree Between Photovoltaic and Load

With the rapid development of distributed photovoltaic (PV) power generation, the variation of PV power generation power will cause unwished voltage fluctuation. In the meantime, load also varies constantly. Energy storage system (ESS), such as battery, is a flexible system that can decrease the variation of power flow effectively. A reasonable control strategy of ESS is important to reduce investment and cost. In this paper, considering time sequence matching degree (TSMD) between photovoltaic and load, a TSMD control strategy of ESS is studied. Firstly, the definition of TSMD is introduced. Secondly, the TSMD control scheme of ESS is analyzed. Finally, the effects of traditional low pass filter (LPF) method and TSMD strategy are compared. The simulation results show that TSMD control scheme is not only effective but also low in the cost.