Active and Reactive Power Control of the PMSG based on wind energy conversion system using Nonlinear Backstepping Control

This paper presents a new robust nonlinear control strategy based on backstepping control applied to control active and reactive power for permanent magnet synchronous generator (PMSG) integrated into a wind energy conversion system (WECS). The goal of this control is to achieve high static and dynamic performance in terms of reference tracking, sensitivity to parameter changes, rejection of external disturbances, and reduction of the chattering phenomenon when compared to the traditional sliding mode control strategy. The use of the classic control technique in sliding mode gives quite interesting results, but its main disadvantage lies in the chattering phenomenon (appearance of high frequency oscillations) caused by the discontinuous control signal, which reduces precision and performance of the system. For this, we propose in this paper a technique to eliminate this chattering phenomenon through the use of a Non-Linear robust control based on the backstepping approach. The proposed technique allows having improvable performance while keeping the robustness of the system and the convergence in finite time. Simulation results demonstrate the good effectiveness and excellent robustness of the proposed technique comparatively to the SMC one.