低压混合式直流断路器中真空电弧电流转移判据  

Investigation on the Vacuum Arc Current Commutation Criteria of the Low Voltage DC Hybrid Circuit Breaker

作　　者：葛国伟[1] 程显[1] 王华清 谢伟 黄金强[3] Ge Guowei;Cheng Xian;Wang Huaqing;Xie Wei;Huang Jinqiang(College of Electrical Engineering Zhengzhou University, Zhengzhou 450001 China;State Grid Henan Electric Power Research Institute, Zhengzhou 450052 China;College of Electrical Engineering Dalian University of Technology, Dalian 116023 China)

机构地区：[1]郑州大学电气工程学院,郑州450001 [2]国网河南省电力公司电力科学研究院,郑州450052 [3]大连理工大学电气工程学院,大连116023

出　　处：《电工技术学报》2019年第19期4038-4047,共10页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金（51977195,51777025）;中国博士后科学基金（2017M622370）;河南省高校重点科研项目（16A470014,19A470008）;国家轨道交通电气化与自动化工程技术研究中心开放课题（NEEC-2017-B07）资助

摘　　要：低压混合式直流断路器的电流转移性能对其开断过程起到至关重要的作用。为获得其电流转移特性及判据,分析低压混合式直流断路器的结构与工作原理,提出真空电弧电流转移过程简化电路。搭建低压混合式直流断路器真空电弧电流转移实验研究平台,采用高速 CMOS 相机观察转移过程中真空电弧发展演变规律。研究电流大小、转移支路参数、燃弧时间等对电流转移特性的影响规律,得到了真空电弧电流转移判据。通过修正参数得到适用于低压混合式直流断路器的真空电弧电流转移改进判据,并通过 400V/5kA 混合式直流断路器样机验证了其有效性,为高性能低压混合式直流断路器研制提供了参考。The vacuum arc current commutation characteristic plays an important role on breaking process of the low voltage DC hybrid circuit breaker (HCB). In order to gain the current commutation characteristic and the criteria, the structure and principle of the DC HCB is analyzed and the simplified circuit of the current commutation is proposed. The test circuit of the vacuum arc current commutation is set up. The vacuum arc development is observed by the high speed CMOS camera and the influence of the main current, commutation circuit parameters and arcing time on the current commutation is investigated. Based on the test results, the vacuum arc current commutation characteristic and criteria is obtained and the modified criteria are conducted. The breaking test of the 400V/5kA DC HCB is conducted, which also verifies the effectiveness of the criteria. The paper provides the reference of the high performance DC HCB.

关 键 词：低压混合式直流断路器 电流转移特性 真空电弧 转移判据 

分 类 号：TM561.2[电气工程—电器]