高电压技术2025，Vol.51Issue(12)：6053-6062,10.DOI:10.13336/j.1003-6520.hve.20241905
基于IGCT的ANPC三电平变流器内管过压机理及抑制方法
Overvoltage Mechanism and Suppression Method of ANPC Three Level Converter Internal Tube Based on IGCT
LI Xiaoguang 1ZHANG Hanrui 1QU Lu 1LI Guodong 1CUI Bin 1YU Zhanqing1
作者信息
- 1. Department of Electrical Engineering and Applied Electronic Technology,Tsinghua University,Beijing 100084,China
- 折叠
摘要
Abstract
Using integrated gate commutated thyristor(IGCT)to construct an active neutral point clamped(ANPC)three-level converter is an effective way to meet the needs of medium-voltage and high-power converter systems.The in-ner tube fundamental frequency modulation can reduce the commutation path length of the IGCT valve string,thereby reducing commutation loop spurs and reducing the turn-off voltage stress of the power device.This article first reveals the mechanism of the internal tube overvoltage caused by the existing inner tube fundamental frequency modulation strategy applied to the IGCT-based ANPC topology,and further analyzes the limitations of the existing inner tube overvoltage suppression method based on RCD snubber circuits.Finally,an optimized inner tube fundamental frequency modulation strategy commutation method with inner tube overvoltage suppression function is proposed to completely avoid the inner tube overvoltage problem.The experiment verifies the correctness of the theoretical analysis and the feasibility of the proposed method.关键词
IGCT/ANPC/三电平/内管基频调制/内管过压/过压抑制Key words
IGCT/ANPC/three-level/inner tube fundamental frequency modulation/inner tube overvoltage/overvoltage suppression引用本文复制引用
LI Xiaoguang,ZHANG Hanrui,QU Lu,LI Guodong,CUI Bin,YU Zhanqing..基于IGCT的ANPC三电平变流器内管过压机理及抑制方法[J].高电压技术,2025,51(12):6053-6062,10.
