基于晶闸管的混合式高压直流断路器重合闸控制策略  

Auto-reclosing Control Strategy of Thyristors-based High Voltage DC Hybrid Circuit Breaker

作　　者：贾海鹏 尹靖元[1] 李金科 韦统振[1,2] 霍群海 韩立博[1] JIA Haipeng;YIN Jingyuan;LI Jinke;WEI Tongzhen;HUO Qunhai;HAN Libo(Institute of Engineering Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences, Beijing 101408,China;China Energy Engineering Group Jiangsu Power Design Institute Co.,Ltd.,Nanjing 211102,China)

机构地区：[1]中国科学院电工研究所,北京100190 [2]中国科学院大学,北京101408 [3]中国能源建设集团江苏省电力设计院有限公司,南京211102

出　　处：《高电压技术》2019年第1期46-54,共9页High Voltage Engineering

基　　金：国家重点研发计划(2016YFB0900900);国家自然科学基金(51607171);中国科学院青年创新促进会(2017180)~~

摘　　要：为了解决由于高压直流电网的暂时性故障引起的高压直流断路器误跳闸问题,提高供电的安全性和可靠性,减少停电损失,需要进行混合式直流断路器的自动重合闸研究。选取基于晶闸管的混合式直流断路器作为研究对象,通过对比不同重合方案下断路器的电流转移特性和能量吸收过程,提出了可行的重合闸策略,并利用Matlab/Simulink仿真软件搭建了所述直流断路器电气模型和控制系统验证策略的有效性。仿真结果显示,所提自动重合闸控制策略降低了在重合失败时分断故障电流的操作难度,加快了隔离速度,降低了转移支路晶闸管的电流应力以及避雷器所需要吸收的能量。该方法可以为混合式直流断路器的工程应用提供一定的理论支持和技术支撑。In order to solve the false tripping problem of high-voltage DC circuit breaker caused by temporary failure of high-voltage DC grid, improve the safety and reliability of power supply, and reduce the loss of power failure, the automatic reclosing research of hybrid DC circuit breaker is necessary. In this paper, the thyristor-based hybrid DC circuit breaker was selected as the research object. By comparing the current transfer characteristics and energy absorption process of the circuit breaker under different coincidence schemes, a feasible reclosing strategy was proposed. Finally, the electrical model and control system of the DC circuit breaker was built in Matlab/Simulink simulation software to verify the validity of the strategy. The simulation results show that the proposed automatic reclosing control strategy reduces the difficulty of breaking the fault current when the coincidence fails, speeds up the isolation speed, reduces the current stress of the branch thyristor and the energy absorbed by the arrester. The method can provide certain theoretical and technical support for the engineering application of the hybrid DC circuit breaker.

关 键 词：直流电网 重合闸 控制策略 混合式高压直流断路器 多端直流输电 故障隔离 

分 类 号：TM561[电气工程—电器]