一种具有重合闸功能的限流式直流断路器  

Current Limiting High Voltage DC Circuit Breaker with Re-closing Function

作　　者：陶彩霞[1] 王玥 高锋阳[1] 杨乔礼[1] TAO Caixia;WANG Yue;GAO Fengyang;YANG Qiaoli(College of Automation and Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)

机构地区：[1]兰州交通大学自动化与电气工程学院,兰州730070

出　　处：《高压电器》2024年第8期43-52,共10页High Voltage Apparatus

基　　金：兰州交通大学-天津大学联合创新基金(2020056);兰州市人才创新项目(2017-RC-95)。

摘　　要：为提高柔性直流输电系统发生短路故障后高压直流断路器的故障隔离、限流及重合闸恢复能力,在现有直流断路器结构基础上提出一种具有重合闸功能的限流式直流断路器(RCL-HDCB)。RCL-HDCB方案改进了断路器的限流支路,使其能够快速重合闸,依据动作过程及原理进行了参数设计,在PSCAD/EMTDC仿真软件中搭建了基于模块化多电平换流器(modular multilevel converter,MMC)的双端直流输电系统,对RCLHDCB的运行状态进行仿真验证,结果表明该设备在发生短路故障后能够快速有效开断,故障电流也得到了较好的抑制,同时重合闸运行稳定,因此该RCL-HDCB方案对柔直输电系统具有一定的指导意义。In order to improve the fault isolation,current limiting and re-closing operation recovery ability of high voltage DC(HVDC)circuit breaker after the short circuit fault in flexible HVDC transmission system,a kind of HVDC circuit breaker with re-closing function(RCL-HDCB)is proposed based on the structural base of existing DC circuit breaker.The current limiting branch of circuit breaker is improved by the RCL-HDCB proposal,which can make it quickly for re-closing operation.The parameters are designed by the operation process and principle and,based on PSCAD/EMTDC simulation software,the dual-terminal DC transmission system by modular Multilevel Converter(MMC)is set up to simulate and verify the operating state of RCL-HDCB.The results show that the device can quickly and effectively break after short circuit fault,the fault current is suppressed better and,at the same time,the re-closing operation is stable.Therefore,the RCL-HDCB proposal has certain guiding significance for the flexible HVDC transmission system.

关 键 词：柔直系统故障 限流式直流断路器 故障隔离 重合闸 

分 类 号：TM561[电气工程—电器] TM721.1