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首页> 外文期刊>Journal of power electronics >Minimization of Active Power and Torque Ripple for a Doubly Fed Induction Generator in Medium Voltage Wind Power Systems under Unbalanced Grid Conditions
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Minimization of Active Power and Torque Ripple for a Doubly Fed Induction Generator in Medium Voltage Wind Power Systems under Unbalanced Grid Conditions

机译：电网不平衡条件下中压风力发电系统中双馈感应发电机的有功功率和转矩脉动最小

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摘要

This paper investigates control algorithms for a doubly fed induction generator with a back-to-back three-level neutral-point clamped voltage source converter in medium voltage wind power systems under unbalanced grid conditions. Three different control algorithms to compensate for unbalanced conditions have been investigated with respect to four performance factors; fault ride-through capability, instantaneous active power pulsation, harmonic distortions and torque pulsation. The control algorithm having a zero amplitude of torque ripple shows the most cost-effective performance concerning torque pulsation. The least active power pulsation is produced by the control algorithm that nullifies the oscillating component of the instantaneous stator active and reactive powers. A combination of these two control algorithms depending on the operating requirements and the depth of the grid unbalance presents the most optimized performance factors under generalized unbalanced operating conditions leading to high performance DFIG wind turbine systems.
机译：本文研究了不平衡电网条件下中压风力发电系统中具有背靠背三电平中性点钳位电压源转换器的双馈感应发电机的控制算法。针对四个性能因素，研究了三种不同的控制算法来补偿不平衡状况。故障穿越能力，瞬时有功功率脉动，谐波畸变和转矩脉动。具有零转矩脉动幅度的控制算法显示出与转矩脉动有关的最具成本效益的性能。控制算法产生最小的有功功率脉动，该算法使瞬时定子有功功率和无功功率的振荡分量无效。取决于运行要求和电网不平衡深度的这两种控制算法的组合在导致不平衡双馈风力发电机系统的通用不平衡运行条件下提供了最优化的性能因子。

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