High Performance of Direct Power Control for a Doubly Fed Induction Generator Based on Adaptive Fuzzy Second Order Sliding Mode Controller in Wind Energy Conversion System

In this paper, adaptive fuzzy second order sliding mode direct power control strategy is applied for a doubly fed induction generator based wind energy generation system. The conventional direct power control with hysteresis regulators has significant active and reactive power ripples at steady-state operation and also the switching frequency varies in a wide range. The proposed direct power control reduces active, reactive and current ripples. It also narrows down the switching frequency variations in induction machine control. The stator active power reference is given through the fuzzy logic MPPT algorithm to extract the maximum of wind power available at the turbine pales. The simulation results show that the proposed direct power control provides significantly improved control performance especially when compared to the conventional direct power control control.