三电平NPC变换器的直接功率控制策略

Proceedings of The 7th International Power Electronics and Motion Control Conference Pub Date : 2012-06-02 DOI:10.1109/IPEMC.2012.6259087

Li Ning, W. Yue, Liangcheng Su, Liao YuFei, Wang Zhao-an

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引用次数: 13

摘要

本文讨论了三电平中性点箝位(NPC)变换器的直接功率控制策略。利用瞬时功率理论，得到了功率(有功功率和无功功率)与空间电压矢量之间的深层关系。在此基础上，针对三电平NPC变换器中存在的dv/dt过大、中性点电位波动等特殊问题，提出了一种三电平NPC变换器的直接功率控制策略。仿真结果表明了新DPC控制策略的正确性。

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Direct power control strategy used in three-level NPC converters

In this paper, direct power control strategy used in three-level neutral point clamped (NPC) converters is discussed. With the theory of instantaneous power, it gets the deep relations between power (active power and reactive power) and space voltage vectors. After the analysis, considering the special issues in three-level NPC converters, such as the excessive dv/dt and fluctuation of neutral point potential, a direct power control (DPC) strategy for three-level NPC converters is proposed. Simulation results show the correctness of the new DPC control strategy.

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Proceedings of The 7th International Power Electronics and Motion Control Conference

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