电器与能效管理技术 ›› 2023, Vol. 0 ›› Issue (5): 25-29.doi: 10.16628/j.cnki.2095-8188.2023.05.004

• 研究与分析 • 上一篇    下一篇

三电平变流器内外管电压不平衡分析

尚扬1, 王永生1, 魏超1, 黄海宏2   

  1. 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
  • 收稿日期:2022-10-09 出版日期:2023-05-30 发布日期:2023-07-25
  • 作者简介:尚扬(1991—),男,工程师,主要从事微电网自动控制及电能质量治理研究。|王永生(1970—),男,高级工程师,主要从事调控运行管理工作。|魏超(1988—),男,工程师,主要从事智能电网调度控制工作。
  • 基金资助:
    国家自然科学基金项目(51177037)

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

SHANG Yang1, WANG Yongsheng1, WEI Chao1, HUANG Haihong2   

  1. 1. Lu’an Power Supply Company,State Grid Anhui Electric Power Company, Lu’an 237000, China
    2. School of Electrical Engineering and Automation,Hefei University of Technology, Hefei 230009, China
  • Received:2022-10-09 Online:2023-05-30 Published:2023-07-25

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。

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

Abstract:

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.

Key words: three-level converter, the voltage imbalance between the inner and outer power devices, distributed inductance, RC buffer circuit

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