Reactive power capabilities of DFIG-based wind park for low-voltage ride-through (LVRT) performance

This paper presents the principles and control schemes for the double-fed induction generator (DFIG)-based wind park. The wind turbine power tracking characteristics and the power flow mechanism of the DFIG-based wind plant are analyzed. The control strategies are presented, including the rotor-side converter (RSC) control, grid-side converter (GSC) converter and the pitch angle control. The voltage regulation mode and var regulation mode are analyzed using control block diagram and the comparison of the simulation results. It is found that voltage regulation mode and reactive power capabilities are effective for low-voltage ride-through performances of the DFIG wind park.