SSR Mitigation of DFIG Wind Power Plants Using Virtual Synchronous Generator Control

Abstract

This paper presents sub-synchronous resonance (SSR) mitigation of double-fed induction generator (DFIG)-based wind generation system. The system is series compensated by a capacitor in transmission model. A virtual generator control (VSG) is developed and supplemented to the grid side converter (GSC) of the DFIG to not only enhance the inertial response, but also to alleviate SSR. Two cases are designed to: 1) analyze the system stability under different compensation levels, and 2) test the sensitivity of parameters of VSG loop on system stability. The linearized small-signal model was developed on MATLAB/Simulink to validate the effectiveness of the proposed method. Sensitivity analysis is conducted to examine the impact of VSG gains on stability of series compensated DFIG-based system.