Robust second order sliding mode control of doubly-fed induction generator for wind energy conversion system

Anotace: This paper presents a robust nonlinear control strategy based on second-order continuous sliding mode control called Super- Twisting Sliding Mode Control (ST-SMC) strategy of a doubly-fed induction generator (DFIG) integrated into a Wind Energy Conversion System (WECS). The Conventional Sliding Mode Control (C-SMC) strategy has a significant drawback, which is the chattering phenomenon, caused by the discontinuous control signal. The proposed ST-SMC technique based on second-order continuous sliding mode control reduces powers, currents, and torque ripples, while maintaining the advantages of the conventional method (C-SMC) such as the robustness against parametric variations of the DFIG. Simulation results show the effectiveness of the proposed ST-SMC strategy in reducing the chattering effect comparatively to the C-SMC one.