Variable structure fuzzy-PI control for strategy of maximal wind energy capture and conversion of doubly fed induction generators

Variable-speed constant-frequency (VSCF), a new typed operational mode for the doubly fed induction generator based wind power generation system is proposed based on the grid-connected power transmission. A control method aimed at increasing efficiency and maximizing energy capture using the stator flux-orientation control technology is introduced. The excitation controller was achieved using fuzzy-PID control. Simulation results with the stator flux-orientation control and fuzzy-PID control that the optimal power efficiency tracking and optimal wind power capturing can be achieved.