三电平变流器内外管电压不平衡分析  

Analysis of Voltage Imbalance Between Inner and Outer Power Tubes of Three-level Converter

作　　者：尚扬 王永生 魏超 黄海宏[2] SHANG Yang;WANG Yongsheng;WEI Chao;HUANG Haihong(Lu’an Power Supply Company,State Grid Anhui Electric Power Company,Lu’an 237000,China;School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]国网安徽省电力公司六安供电公司,安徽六安237000 [2]合肥工业大学电气与自动化工程学院,安徽合肥230009

出　　处：《电器与能效管理技术》2023年第5期25-29,共5页Electrical & Energy Management Technology

基　　金：国家自然科学基金项目(51177037)。

摘　　要：三电平变流器在相邻开关状态之间转换时,会发生内外管电压不平衡现象。对其产生机理进行研究,结果表明是由于电路中分布电感对IGBT的CE间等效电容释放能量所导致的,采用RC缓冲电路能有效抑制内外管电压不平衡。最后,对原理进行分析,并通过实验进行验证。The voltage imbalance between the inner and outer power tubes may occur during the transition between the adjacent switching states of the three-level converter.The mechanism of voltage imbalance is studied.The research results show that the phenomenon is caused by the energy of the distributed inductance in the circuit releasing to the equivalent capacitance between CE of the IGBT.The RC buffer circuit can suppress the above-mentioned voltage imbalance of the inner and outer power tubes.Finally,the principle is analyzed and verified by experiments.

关 键 词：三电平变流器 内外管电压不平衡 分布电感 RC缓冲电路 

分 类 号：TM46[电气工程—电器]