湖州市内发生的一起线路跳闸故障,为避免此类故障再次发生,分析故障发生的原因,提出防治对策。首先通过排查故障点周边情况判断出该故障为远处雷击故障,然后对分布式故障波以及扰动波形进行分析确定远处落雷导致了该故障发生,通过仿真对杆塔绕击耐雷水平进行分析,分析结果也支撑了本次跳闸与落雷的关联。为判断是否绝缘子性能下降导致故障发生,对绝缘子进行盐密试验、憎水性试验和剖检,实验结果证明绝缘子绝缘性能良好。因此推断故障发生的原因可能是小型异物搭挂使绝缘子绝缘性能下降。为避免此类故障再次发生,结合湖州当地情况提出建议。
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