一起500 kV同塔双回线路雷击跳闸故障综合分析

Comprehensive Analysis of a Lightning Outage Fault of a 500kV Double-circuit Transmission Line on the Same Tower

针对一起500 kV同塔双回重要输电线路发生的跳闸故障,结合故障塔的巡检情况和设计参数,使用了现场检查、故障塔塔头电气间隙校核、接地电阻测量、雷击风险评估等方法,对故障原因进行了排查及综合分析,判断了雷击放电的原因,并提出了线路防雷改造措施,为其他线路的长间隙雷击放电故障分析提供参考。

Aimed at analyzing a tripping fault of an important 500 kV double-circuit transmission line on the same tower, and combined with the inspection information and design parameters of the faulty tower, methods such as field inspection, check of the electrical gap of the top hamper of the faulty tower, grounding resistance measurement and lightning stroke risk assessment are used to investigate and comprehensively analyze the cause of the fault, and to judge the cause of the lightning-induced discharge. Lightning protection modification measures of the transmission line are proposed to provide a reference point for the analysis of the long air gap lightning discharge fault of other lines.