混合式高压直流断路器分断过程电磁瞬态建模和测试  

Electromagnetic Transient Modeling and Test of Hybrid DC Circuit Breaker

作　　者：陈龙龙 魏晓光 焦重庆 汤广福 崔翔 高冲 Chen Longlong;Wei Xiaoguang;Jiao Chongqing;Tang Guangfu;Cui Xiang;Gao Chong(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University,Beijing 102206 China;State Key Laboratory of Advanced Power Transmission Technology Global Energy Interconnection Research Institute,Beijing 102209 China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京102206 [2]先进输电技术国家重点实验室(全球能源互联网研究院有限公司),北京102209

出　　处：《电工技术学报》2021年第24期5261-5271,共11页Transactions of China Electrotechnical Society

基　　金：先进输电技术国家重点实验室开放基金资助项目(GEIRI-SKL-2018-006)。

摘　　要：高压直流断路器是柔性直流电网的核心装备,在数毫秒内分断高达25kA的大电流,分断过程会产生强烈的电磁骚扰,可能导致与绝缘栅双极型晶体管(IGBT)直接相连的驱动和控制电路无法工作。由于缺乏针对直流断路器位于高电位驱动的电磁干扰考核方法,导致驱动设计没有标准可依。该文通过理论分析和试验测试相结合,对分断时电磁瞬态过程进行数学建模,定性分析端口产生的电磁干扰原因,并在实验室首次测试了500kV混合式直流断路器样机在大电流分断时,集电极和发射极(VCE)、门极驱动(VGE)和电源等端口干扰信号,提炼了时、频域干扰特征。通过将测试结果与现有电磁干扰试验标准对比,表明VCE/VGE在开断过程的干扰特征与浪涌和阻尼振荡波接近,而电源干扰特征更接近阻尼振荡波,设计中应重点考虑这两个试验项目。HVDC circuit breaker is the core equipment of the DC grid.It is required to cut off large currents of tens to thousands of amperes within a few milliseconds.The strong electromagnetic disturbance during the breaking process may cause interference,which will in return influence IGBTs and the proper work of the secondary equipment.Due to the lack of standards for electromagnetic driver tests,the theoretical analysis and testing are combined to analyze the electromagnetic transient process.After that,a test is firstly carried out in the laboratory to verify the actual collector emitter(VCE)and gate drive(VGE)in a 500kV hybrid DC circuit breaker with a maximum breaking current of 25kA,and the tests signals were further analyzed in both time and frequency domains to extract accurate interference characteristics.The results indicate that the interference characteristics of VCE/VGE during the breaking process is similar to the surge test and damped oscillation wave,while the power interference characteristics are closer to the damped oscillation waves.Therefore,these two kinds of anti-electromagnetic interference capabilities should be considered in design and test.

关 键 词：500kV直流断路器 电磁骚扰 电流分断 干扰测试 

分 类 号：TM46[电气工程—电器]