摘要
目前110 kV桥断路器保护的整定是参照110 kV变压器高压侧后备保护的整定原则进行的,在运行中存在误动的可能。为此,在分析桥断路器保护合环转电期间发生误动的原因的基础上,提出按1.1倍110 kV线路载流量计算桥断路器保护电流定值的整定原则,并从保护的灵敏性、选择性、防误动能力等方面对改进的整定原则进行分析。分析结果表明:按改进原则整定的桥断路器保护既能解决合环转电过程中的误动问题,也满足选择性和灵敏性要求,且可长期投入运行。
Current setting for 110 kV bridge breaker refers to setting principles of backupof 110 kV transformer, which may cause misoperation. Therefore, this paper analyzperiod of loop closing operation of the bridge breaker protection and presents setting principles for calof protective currents of the breaker according to 1 . 1 times of ampacity of the 110 kV line. Meanwhile , it makes analysis on improved setting principles in aspects of sensitivity , selectivity and misoperation prevention indicate protection of the bridge breaker adjusted according to the improved principles can not onsoperation in the process of loop closing but also meet demands of selectivity and for long term.
出处
《广东电力》
2018年第2期95-99,共5页
Guangdong Electric Power
关键词
桥断路器保护
整定原则
合环转电
误动
bridge breaker protection
setting principle
loop closing operation
misoperation
