Research on the Control of Optical-Storage Grid-Connected Technology Based on Virtual Synchronous Generator

In order to improve penetration rate of new energy on-grid power generation, reduce carbon emissions, promote energy security and environmental protection, and solve the power quality problems caused by frequency and voltage fluctuations in photovoltaic on-grid power generation, the paper uses Voltage-controlled Virtual Synchronous Generator (VVSG) technology to control grid-connected inverters, which can enable photovoltaic grid-connected power generation to actively take part in the frequency and voltage regulation of power grid, meanwhile it can making the operation of the power system more secure and stable. In the paper, combined with the characteristics for photovoltaic power generation system, a hybrid energy storage link is added, it is used to stabilize DC bus voltage and perform peak shaving and valley filling, set a VVSG mathematical model, and this control strategies of each part, active power-frequency control and reactive power-voltage control are analyzed. Finally, this effectiveness of control strategy is verified by establishing a simulation model in Matlab/Simulink.