一起110kV线路单相断线故障分析

Fault analysis of single-phase wire break of 110 kV line

阐述了110 kV联络线单相断线引起线路保护动跳闸事故的过程和系统结线方式,用对称分量法分析了单相断股和断线故障引起跳闸的原因,指出应采取有效措施,尽快消除不对称运行,提高电网安全、经济运行水平。

This paper introduces the process of trip protection caused by single-phase wire break and the connecting mode of 110 kV interconnection,analyzes the reason for single-phase wire break and trip protection by symmetrical components method and proposes to eliminate asymmetric operation as soon as possible and enhances the safe and economic operation of electric network.