A Novel Carrier-Overlapped PWM Method for Four-Level Neutral-Point Clamped Converters

被引：67
|
作者：
Wang, Kui [1 ]
Zheng, Zedong [1 ]
Li, Yongdong [1 ]
机构：
[1] Tsinghua Univ, Dept Elect Engn, State Key Lab Power Syst, Beijing 100084, Peoples R China
来源：
IEEE TRANSACTIONS ON POWER ELECTRONICS | 2019年 / 34卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Capacitor voltage balancing; carrier-overlapped pulsewidth modulation (COPWM); multilevel converter; neutral-point clamped (NPC); volt-second balance; VOLTAGE-BALANCE; DIODE;
D O I：
10.1109/TPEL.2018.2833148
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：
Neutral-point clamped (NPC) multilevel converters with more than three voltage levels are hard to balance the dc-link capacitor voltages, which limits their application in the industry. In order to solve the neutral-point potential balancing problem of four-level NPC converters, a novel carrier-overlapped pulsewidth modulation (PWM) method is proposed in this letter, which satisfies the volt-second balance principle and can achieve the natural voltage balance of three dc-link capacitors under ideal and steady states. Experimental results are presented to confirm the validity of this PWM method.
引用
收藏
页码：7 / 12
页数：6
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