江苏省输电线路雷击跳闸原因分析及防雷击措施

Cause Analysis of Thunder Outage and Thunder Protection Measures of Transmission Lines

根据部分有代表性的输电线路的运行统计资料,运用耐雷水平和雷击跳闸率计算公式,查找出导致雷击跳闸率上升的主要原因,并进行理论分析,确定导致雷击跳闸率上升的关键问题.针对这一关键问题进行敏感性分析,提出控制措施.同时,对雷击跳闸率公式可能存在的问题,提出了修正建议.

The primary cause for the increase in lightning-stroke trip-out rate is deduced based on the statistical data and computation formula of lightning resisting level and lightning-stroke trip-out rate.Further theoretical analysis is made and the inner key problem of leading to the increase in lightning-stroke trip-out rate is determined.With focus on the inner key problem,the sensitivity analysis is made and the control measures are proposed in a most systematical and thorough manner.Through analyzing the present computation formula of lightning-stroke trip-out rate,the existing problems are figured out and modification suggestions are put forward.