Robust Sliding Mode Hybrid Controller Against Mechanical Parameter Inaccuracy of a Wind Energy Conversion System Based on a Doubly-Fed Inductance Generator

Abstract

To ensure maximum efficiency and better reliability of the wind energy conversion systems (WECS), the development of robust controllers is crucial. In this paper, a robust Sliding Mode Hybrid Controller (SMHC) is adopted to overcome uncertain mechanical parameters' values used in the system's model. The WECS studied is based on a Doubly-Fed Induction Generator (DFIG). To verify the efficacy of the SMHC, a comparison with Fuzzy Hybrid and classical PI controllers has been carried out. The proposed controller demonstrates a faster response with a low settling time along with negligible overshoot despite the system's large mechanical uncertainties.