电网不平衡下双馈感应发电机无锁相环直接定子电流矢量控制策略

This paper proposes a direct stator current vector control strategy of a doubly fed induction generator (DFIG) without phase-locked loop (PLL) during network unbalance. In the proposed control strategy, a virtual phase angle produced by the nominal frequency is used for coordinate transformations instead of the actual voltage one estimated by the PLL. Since the calculation of the commanded stator ...