Simulation Research on Wind Storage Joint Control of Wind Turbine Based on VSG

Abstract

The fluctuation of wind energy has an impact on the stability of active power output and system frequency, resulting in the decline of power quality. In addition, the large-scale wind power generation which is connected to the power grid reduces the inertia of system. The use of VSG control can effectively deal with the lack of inertia response ability of traditional synchronous generators. In the state of large-scale distributed wind power generation connected to the power grid, the ability of wind turbines to suppress the power oscillation of the system can be enhanced. In order to improve this ability, the VSG control strategy is introduced into the control of network test converter, and the virtual inertia control technology is used to respond to the system frequency modulation. The voltage loop and current loop control strategy are adopted for the Generator side rectifier. Meanwhile, the energy storage control of the battery system is introduced. Realize the regulation of wind power active power. In the MATLAB/Simulink, a combined wind energy storage system is built to verify the correctness of the proposed scheme. Finally, the maximum wind energy tracking, the enhancement of system frequency regulation ability and the stabilization of active power output fluctuation are realized. It can effectively restrain the reduction of economic benefits after long-term operation of wind farm.