采用带间隙避雷器降低 10 kV 架空线路跳闸率的应用

Ｒeducing Trip － out Ｒate of 10 kV Overhead Line by Application of Arrester with Gaps

摘要:

针对泸州电厂雷雨季节期间经常发生 10 kV 架空线路跳闸现象，对架空线路跳闸率高的原因进行了分析，探 讨可能的改善措施，提出了将氧化锌避雷器更换为带间隙避雷器的解决方案。理论分析和现场应用表明这一措施有 效减少了感应过电压引发的线路跳闸，提高了架空线路运行可靠性。

Abstract:

The 10 kV overhead lines of Luzhou power station frequently trip out due to lightning overvoltage in thunderstorm season． The reasons of high trip － out rate are analyzed and the potential solutions are discussed． Theory analysis and field application show that substituting the existing MOA with arrester with gaps can effectively reduce the trip － out rate，which can significantly improve the operational reliability of overhead lines．