Analysis of Low Voltage Ride through System for Doubly Fed Induction Wind Turbine

Abstract

The design of low voltage ride through (LVRT) control system for doubly fed induction wind turbine (DFIG) is very important for the transient stability of wind farm and power system. Due to the special connection between DFIG and power grid, (DFIG) is extremely sensitive to the disturbance of power grid. Based on this, the crowbar resistance protection scheme is selected in the low voltage ride through design of DFIG. Under the three-phase symmetrical voltage disturbance, the dynamic performance of DFIG system with or without crowbar is compared and analyzed. Through the detailed observation of DFIG system parameters, the effectiveness of the scheme is verified. The modeling and simulation of this work uses Matlab/Simulink software. It is found that when the Active IGBT crowbar circuit is connected, the DFIG system is stable in a short time.