Neutral-point potential balancing problem of five-level active neutral-point-clamped inverter

被引：0

作者：

Wang, Kui ^{[1
]}

Zheng, Zedong ^{[1
]}

Li, Yongdong ^{[1
]}

机构：

[1] State Key Lab of Control and Simulation of Power Systems and Generation Equipments, Dept. of Electrical Engineering, Tsinghua University, Haidian District, Beijing 100084, China

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2012年 / 32卷 / 03期

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摘要：

Five-level active neutral-point-clamped (ANPC) converter is a newly emerging topology which can overcome the drawbacks of traditional diode-clamped converters and flying-capacitor converters. The neutral-point potential balancing problem of a five-level ANPC inverter was studied. By calculating the average neutral-point current in a fundamental period, it can be concluded that the neutral-point potential can be balanced by itself under ideal condition and steady state. A neutral-point potential balancing algorithm based on zero-sequence voltage injection was presented. By calculating the neutral-point currents of all key zero-sequence voltages, the most appropriate zero-sequence voltage was selected to generate the required neutral-point current, which can make the neutral-point voltage ripple the lowest. Experimental results were presented to verify the validity of the algorithm. © 2012 Chinese Society for Electrical Engineering.

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页码：30 / 35