输电线路雷击故障的复现分析方法研究

为了对防雷措施的实施和线路改造提供针对性的指导意见与建议,应加强对雷击故障的深入分析,总结雷击故障中的潜在规律。在雷击故障基本分析方法的基础上提出了雷击故障复现分析方法,以实际雷击故障为例,搜集整理雷击跳闸信息、线路结构特征、地形地貌特征等运行资料,结合雷电监测系统查询的雷击跳闸时间段内跳闸线路走廊的雷电活动情况,判别线路雷击故障性质,采用防雷计算分析方法校验线路的耐雷性能,与雷电监测系统查询的雷电信息比对,核算引起线路雷击跳闸可能的雷击入射点范围。分析结果表明,基于多次雷击故障复现分析结果得出的故障规律对提出有效防雷措施具有显著的指导意义。

Recurrence Analysis Method Study of Transmission Line Lightning Failures

In order to provide the guidance and advice for implementing lightning protection measures and track remodeling,lightning failures analysis should be strengthened deeply and the potential laws of lightning failures should also be summarized.On the basis of the basic analysis method of lightning failures,the deep fault recurrence analysis method is proposed.The information of an actual lighting failure is gleaned from lightning strike tripping information,line structure characteristics and topography features.Combined with line corridors lightning activity of lightning trip duration queried from lightning monitoring system,line lightning fault properties are identified.Then lightning protection calculation analysis method is used to verify the ray resistance of the circuit.After compared with the thunder and lightning information from the monitoring system,the possible range of lightning incident point causing the line lightning trip-out is accounted.The analysis results show that the deep recurrence analysis method can strengthen the lightning protection measures efficiently and has obvious guiding significance.