Virtual Synchronous Generator Control of Stand-Alone PV Station to Enhance Voltage Stability

Abstract

With the increasing integration of renewable energy resources (RESs) like photovoltaic (PV) systems to the rural consumer may affect the voltage stability during network disturbance situations. This is due to the fact that the conventional inverter system of the PV station cannot inject sufficient reactive power at a transient state. Therefore, to solve this issue, this paper proposes a virtual synchronous generator (VSG) control mechanism of the PV system to enhance voltage stability. The proposed VSG emulates the behavior of conventional power plants and control the reactive power more effectively during the network disturbance event. To justify the validity of the proposed VSG control PV system, simulation analysis, and comparison study has been done with the conventional control mechanism of the PV system.