Fractional-order sliding-mode control of a wind turbine for tracking maximum power point

Abstract

This study examines a nonlinear control technique based on fractional-order sliding mode theory to track the highest power point of a wind energy conversion system. The proposed method achieves chatter-free fractional sliding-mode control by using a continuous control strategy. The main advantages of the proposed fractional-order SMC law are accurate reference tracking, elimination of the chattering problem and minimization of overshoot. To demonstrate the boundedness and convergence characteristics of the closed-loop signals, Lyapunov's stability theory is used. Extensive simulations results are presented to evaluate the robustness and effectiveness of the proposed control under various uncertainty.