2例110kV线路故障掉闸分析
Analysis of disconnection fault of two 110 kV transmission line
段巍钊1
作者信息
- 1. 国网运城供电公司, 山西 运城 044000
- 折叠
摘要
110 kV电力线路的故障原因有90%以上均为线路单相故障接地,线路发生故障时,可由线路上装设的继电保护装置动作切除故障.分析了2 起110 kV线路保护动作情况一致,但由于线路故障性质的区别,造成不同后果的案例,并通过短路电流的对称分量法计算验证了2 起事故的保护装置动作的逻辑性.研究成果可为 110 kV线路故障及事故处理提供理论依据.
Abstract
More than 90%of the fault causes of 110 kV power lines are single-phase fault grounding of the lines;when a fault occurs on a line,the fault can be removed by the action of the relay protection device installed on the line.In this paper,two cases of 110 kV transmission line protection actions are identical,but the different consequences are caused by the difference in line fault nature;the logic of the protective device action of the two accidents was verified by the calculation of the short-circuit current with the symmetrical component method.The research results can provide a theoretical basis for the analysis of 110 kV line fault and accident treatment.
关键词
接地/继电保护/事故处理Key words
earthing/power systems protection/accident treatment引用本文复制引用
出版年
2024
NETL
NSTL
万方数据