An Improved Control Strategy for DVR in order to Achieve both LVRT and HVRT in DFIG Wind Turbine

Abstract

Doubly fed induction generator (DFIG) based wind turbines must support the grid during faults and voltage sag/swells. In this regard, Low voltage ride through (LVRT) and High voltage ride through (HVRT) could be used to improve DFIG performance. In this paper, a control strategy, based on fuzzy control, has been proposed to improve DFIG LVRT and HVRT capability. The effectiveness and performance of this method has been validated by MATLAB/SIMULINK simulation for both voltage sag and swell under various fault conditions. In addition, this method has been compared with some conventional methods and proficiencies have been discussed.