Experimental Evaluation of an Advanced Super Twisting Sliding Mode Power Control for Variable-Speed Wind Turbine Systems

This paper presents an original contribution aimed at enhancing the performance characteristics of the wind energy conversion system employing a Doubly-Fed-Induction-Generator (DFIG). The primary objective is to minimize the Total Harmonic Distortion (THD) and strengthen the overall dynamic stability of the system. The proposed strategy is founded on the integration of the Super-Twisting optimization algorithm within a Sliding Mode Control (SMC). Although SMC is widely adopted in wind energy applications due to its robustness, it suffers from certain drawbacks, notably increased harmonic distortion mainly caused by the chattering phenomenon. The control strategy developed in this work seeks to alleviate this issue while maintaining high robustness against parameter variations and external disturbances. The performances of the proposed controller was validated both comprehensive simulations carried out in Matlab/Simulink, followed by experimental verification on a workbench equipped with the dSPACE-DS1104 control board.