新型IGCT换流阀拓扑及电气应力分析  

Topology and Electrical Stress Analysis of a Novel IGCT Converter

作　　者：张朝峰 姚德贵 宋伟 刘长兵 ZHANG Chao-feng;YAO De-gui;SONG Wei;LIU Chang-bing(Electric Power of Henan,Zhengzhou 450018,China;Electric Power Research Institute,Electric Power of Henan,Zhengzhou 450018,China;Department of Electrical Engineering and Applied Electronic Technology,Tsinghua University,Beijing 100084,China)

机构地区：[1]国网河南省电力公司,河南郑州450018 [2]国网河南省电力公司电力科学研究院,河南郑州450018 [3]清华大学,电机工程与应用电子技术系,北京100084

出　　处：《电力电子技术》2025年第3期121-124,共4页Power Electronics

基　　金：国家电网有限公司科技项目(SGHADK00PJJS-2200519)

摘　　要：基于集成门极换流晶闸管(IGCT)的混合换相换流阀(HCC)具备主动关断的能力,可用于解决常规高压直流输电中的换相失败问题。对HCC开展电气应力分析是换流阀电气、绝缘和实验设计的基础。因此,本文先介绍了HCC的拓扑结构、工作原理和主动关断策略。根据HCC的拓扑结构和参数,建立了HCC换流阀高精度宽频模型,仿真分析雷电冲击电压、操作冲击电压、陡波冲击电压3种暂态工况下,施加在IGCT器件上的最大电压与最大电压变化率(du/dt),仿真结果表明最大电压与最大电压变化率在IGCT的过电压耐受能力之内。最后,进行恢复期暂态正向电压冲击试验,验证了换流阀的过电压耐受能力。电气应力的分析结果可支持HCC应用于直流输电系统。The hybrid commutated converter(HCC)based on integrated gate commutated thyristor(IGCT)has the ability to actively tur off,which can be used to solve the problem of commutation failure in conventional high-voltage direct current transmission.Conducting electrical stress analysis on HCC is the foundation for the electrical,insulation,and experimental design of converter.Therefore,this article firstly introduces the topology,working principle,and the strate-gy of actively turing off of HCC.Based on the topology and parameters of HCC,a high-precision wideband model of HCC converter is established.Simulation analysis is conducted on the maximum voltage and maximum voltage change rate(du/dt)applied to IGCT devices under three transient conditions:lightning impulse voltage,operating impulse volt-age,and steep wave impulse voltage.Simulation results show that the maximum voltage and maximum voltage change rate are within the overvoltage tolerance of IGCT.Finally,a transient forward voltage surge test is conthyristorducted during the recovery period to verify the overvoltage tolerance of the converter.The analysis results of electrical stress can support the application of HCC in DC transmission systems.

关 键 词：集成门极换流晶闸管 换流阀 电气应力 

分 类 号：TN32[电子电信—物理电子学]