摘要
配电网系统为中性点非有效接地系统,单相接地故障时短路电流较小,并且配电网线路及其分支较多,继电保护配置困难,电网故障往往只考虑单一故障,而很少关注复合故障的问题。针对一起配电网线路异名相跨线故障导致的主变保护动作进行细致分析,找到了隐藏的故障原因,根据存在的问题提出了解决建议,为现场配电网故障分析和运维提供参考。
The distribution network system is a neutral point non effetaive earthing system,the short circuit current is small when single-phase grounding fault occurs,and there are many distribution network lines and their branches,it is difficult to configure relay protetaion,we often only considers a single fault when the power network fault,and pays little attention to the problem of composite fault.A detailed analysis was condutaed on the main transformer protetaion ataion caused by distribution network line heteronymous phase cross country fault,the hidden cause of the fault was identified,and solutions were proposed based on the existing problems,providing reference for on-site distribution network fault analysis and operation and maintenance.
作者
王松
岑荣佳
WANG Song;CEN Rongjia(Duyun Power Supply Bureau of Guizhou Power Grid Co.,Ltd.,Guizhou Duyun 558000,China)
出处
《农村电气化》
2023年第8期48-52,共5页
Rural Electrification
关键词
配电网
跨线故障
保护动作
distribution network
cross country fault
protetaion ataion
