Neutral-Point Voltage Balancing Method for Three-Level Inverter Systems with a Time-Offset Estimation Scheme

被引：30
|
作者：
Choi, Ui-Min [1 ]
Lee, Kyo-Beum [1 ]
机构：
[1] Ajou Univ, Dept Elect & Comp Eng, Suwon 441749, South Korea
来源：
JOURNAL OF POWER ELECTRONICS | 2013年 / 13卷 / 02期
基金：
新加坡国家研究基金会;
关键词：
Multilevel; Neutral-point voltage balancing; NPC inverter; CLAMPED INVERTERS; INDEX;
D O I：
10.6113/JPE.2013.13.2.243
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper presents a neutral-point voltage balancing method for three-level inverter systems using a time-offset estimation scheme. The neutral-point voltage is balanced by adding a time-offset to the turn-on time of the switches. If an inaccurate time-offset is added, the neutral-point deviation still remains. An accurate time-offset is obtained through the proposed time-offset estimation scheme. This method is implemented without additional hardware, complex calculations, or analysis. The effectiveness of the proposed method is verified by experiments.
引用
收藏
页码：243 / 249
页数：7
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