Modeling and Analysis of DFIG During Grid Fault

A stability analysis model is established for DFIG (doubly-fed induction generator) with power grid fault to study its stability. The control strategy is proposed adding damping controller to the rotor side control of DFIG. It still analyzes the fault ride through ability of DFIG under different crowbar impedance. The simulation results show that the low voltage ride through ability of DFIG can be effectively improved by adding the damping controller and selecting the appropriate crowbar impedance value. The operation of wind turbine is realized safely and steadily during power grid fault.