Stability analysis and study between classical sliding mode control (SMC) and super twisting algorithm (STA) for doubly fed induction generator (DFIG) under wind turbine

Abstract

This paper provides the modeling and control of stator active and reactive power for doubly fed induction generator (DFIG) under wind turbine systems using a variable structure control theory called Sliding Mode Control (SMC). The classical sliding mode method achieves undesirable chattering effect, which can damage the system. For this, it is relevant to use the second-order sliding mode algorithms to avoid this chattering.Two types of nonlinear control are presented and compared: classical first order Sliding Mode Control and Super Twisting Algorithm (STA), the later needs only the information of sliding surface. Their performances are compared in terms of power reference tracking and robustness against machine parameters variations. Simulation results using Matlab/Simulink have demonstrated the effectiveness and robustness of the Super Twisting Sliding Mode Controller compared to first order Sliding Mode Controller owing to the fact that of its efficacy in reducing the chattering phenomenon.