Research on photovoltaic energy storage microgrid based on virtual synchronous generator control strategy

This paper presents a hybrid two-stage inverter system where the energy storage unit and PV array are connected to the DC side. To address PV power generation’s intermittency and instability, improved control measures are introduced, including DC bus voltage stabilization and power flow management for the energy storage unit. Verification under designed conditions shows that the energy storage unit can compensate for power differences when PV output fluctuates and assist in primary frequency regulation when grid frequency fluctuates, ensuring continuous output power and providing necessary active power support to the grid.