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This paper proposes a new fuzzy-based direct power control (FDPC) for doubly fed induction generator (DFIG)-based wind energy conversion systems. In the proposed method, the required rotor voltages are directly calculated based on fuzzy controller, stator voltage, rotor speed and some machine parameters. The switching table and hysteresis comparator used in conventional DPC are replaced by PWM modulator. Also the converter switching frequency is constant. Furthermore, the effect of machine parameters mismatches is found negligible. Simulations are done to verify the effectiveness of proposed method under steady state and transient conditions and also machine parameters mismatches.
Date of Conference: 18-19 Oct. 2012