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
收藏
页码：8329 / 8333
页数：5
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