Maximum Power Point Tracking of FC-DFIG with New Reaching Law Adaptive Sliding Mode Control

In this paper, an adaptive sliding mode control (SMC) with a new reaching law is proposed for the fully controlled doubly-fed induction generator (FC-DFIG) in which the stator side and the rotor side are connected to the converters. The stator and rotor of FC-DFIG system are connected to DC grid directly by two voltage source converters. By improving the gain of equal-speed reaching law and introducing saturation function, the reaching speed of sliding mode control is improved and chattering is reduced, the anti-interference ability is enhanced by adaptive control. The control strategy makes the system run in the maximum power point tracking (MPPT) mode, and improves the wind energy utilization efficiency of FC-DFIG system. Compared with vector control (VC) and traditional SMC in MATLAB/Simulink simulation, the control performance of the proposed control strategy in this paper is superior.