A Novel Torque Ripple Reduction Strategy for Predictive Direct Torque Controlled PMSG

In this paper, a new method for predictive direct torque control of permanent magnet synchronous wind power generator based on space vector modulation is proposed to reduce the torque and flux ripples, a suitable cost function is established and the proper voltage vector with the same amplitude and different angle according to regional voltage vector table are presented to the cost function, the voltage vector which minimizes the cost function would be selected. The predictive scheme of torque and flux is proposed to decrease the impact due to the sampling time delay. The proposed predictive DTC is compared with traditional SVM-based DTC from the simulation analysis. The simulation results validate that the proposed DTC can get excellent dynamic performance, lower torque ripple and strong robustness against generator parameter variations.