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Variable structure direct torque control of brushless doubly fed induction generator for wind turbine applications

In this paper a variable structure direct torque control based on sliding mode approach, linear PI and space vector modulation (SVM) is proposed for a brushless doubly fed induction generator. The DTC transient merits and robustness are preserved and the steady state behavior is improved by reducing the torque and flux pulsations. The presented method also guarantees maximum power point tracking (MPPT) with a desirable operation. The simulation results verify an accurate, quick and robust operation of the brushless doubly fed induction generator for wind turbine applications.