Research on Balance of Neutral-Point Potential in Three Level Neutral Point Clamped Inverter

被引：0

作者：

Wang, Xinying ^{[1
]}

Huo, Tangkai ^{[1
]}

Nian, Xiaohong ^{[1
]}

Chu, Xiaoyan ^{[1
]}

机构：

[1] Cent S Univ, Coll Informat Sci & Engn, Changsha, Hunan, Peoples R China

来源：

IECON 2017 - 43RD ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY | 2017年

基金：

美国国家科学基金会;

关键词：

diode clamped; three-level; neutral-point balance; offset; CONVERTER; STRATEGY; MODULATION;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper studies the balance problems of neutral-point potential in three level neutral-point clamped inverter. Based on double modulation wave pulse control strategy, a new offset voltage algorithm is proposed. This control strategy can completely eliminate the low-frequency fluctuations in neutral-point potential. The size of neutral point current is changed by changing the zero-state duty cycle per phase such that the balance of neutral-point potential is achieved. Considering the direction of maximum current, the direction of neutral-point potential fluctuation and the limitation of dynamic critical range, the best compensation is chosen to balance neutral-point potential quickly. The proposed control strategy is verified by the simulation results.

引用

页码：8329 / 8333

页数：5

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