A novel control scheme for three-level NPC back-to-back converter
A novel control scheme for three-level NPC back-to-back converter
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DOI：
10.1109/vppc.2008.4677437
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发表时间：
2008-11
期刊：
影响因子：
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通讯作者：
Zhang Yingchao;Zhao Zhengming;Lu Ting;Z. Yongchang;Yuan Liqiang
中科院分区：
文献类型：
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作者：
Zhang Yingchao;Zhao Zhengming;Lu Ting;Z. Yongchang;Yuan Liqiang
提出了一种新的三电平中性点箝位背靠背变换器控制方案。分析了变流器瞬时能量的分布与平衡，对前端整流器采用空间矢量调制（DPC_SVM）直接功率控制，后端变频感应电动机采用转子磁场定向控制（FOC）。为了使直流链路具有更好的动态性能，引入了从逆变器到整流端的功率前馈控制回路。实验结果表明，采用所提出的控制方案，三电平NPC背对背变换器具有良好的动态性能，并且可以在直流母线电容器尺寸小的情况下使直流母线电压波动最小化。
This paper presents a novel control scheme for three-level neutral point clamped (NPC) back-to-back converter. The distribution and balance of instantaneous energy for the converter is analyzed, and the direct power control with space vector modulation (DPC_SVM) for front-end rectifier and rotor field oriented control (FOC) for back-end inverter-fed induction motor are adopted respectively. A power feed-forward control loop from inverter to rectifier side is introduced to obtain better dynamic performance for the DC-link. Experimental results show that with the proposed control scheme, the three-level NPC back-to-back converter exhibits excellent dynamic performance, and can minimize DC-bus voltage fluctuations with low size of DC-bus capacitors.