一种线路断路器失灵保护新方案  

A Novel Scheme for Line Circuit Breaker Failure Protection

作　　者：张建业 谢春芳 谭爱国 ZHANG Jianye;XIE Chunfang;TAN Aiguo(Enshi Power Supply Company,State Grid Hubei Electric Power Company,Enshi 445000,China;School of Information Engineering,Hubei University for Nationalities,Enshi 445000,China)

机构地区：[1]国网湖北省电力有限公司恩施供电公司,湖北恩施445000 [2]湖北民族学院信息工程学院,湖北恩施445000

出　　处：《湖北民族学院学报（自然科学版）》2018年第1期81-85,共5页Journal of Hubei Minzu University(Natural Science Edition)

基　　金：国家自然科学基金项目(51177060);湖北省自然科学基金项目(2013CFC125)

摘　　要：经复合电压闭锁的线路断路器失灵保护在长线路末端故障时,存在因电压闭锁元件定值灵敏度不足而拒动的问题.首先分析了传统基于复压闭锁的失灵保护判据拒动的情形,然后提出了基于站域信息共享的线路断路器失灵保护新方案:在站控层计算保护判据生成保护出口动作信号,采用冗余电流信息对有流/无流进行检测,判断断路器是否断开,并使用重合闸检无压信号对复压闭锁判据进行补充.理论分析和仿真结果表明,基于站域信息共享的失灵保护新方案具有较高的可靠性.The circuit breaker failure protection with compound voltage blocking has the problem of refusing to trip due to the insufficient sensitivity when a fault happens at the end of the long line.To solve this problem,this paper first analyzes the situation that the traditional circuit breaker failure protection refuse to act,and then the new circuit breaker failure protection of line based on substation area information is put forward：calculating local protection criterion to get acting signal at substation control layer,redundant current information is used to judge whether the breaker is cut off,and the voltage information of reclosure device to supplement the compound voltage blocking method of circuit breaker failure protection.The theoretical analysis and simulation results show that the new scheme of the circuit breaker failure protection based on substation area information sharing has higher reliability.

关 键 词：失灵保护 复合电压闭锁 站域信息共享 检无压 

分 类 号：TM561.1[电气工程—电器]