云对云闪电对中压线路的影响

2022 36th International Conference on Lightning Protection (ICLP) Pub Date : 2022-10-02 DOI:10.1109/ICLP56858.2022.9942485

W. D. van Schalkwyk, Chandima Gomes, J. Van Coller

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引用次数: 2

摘要

云对云(CC)闪电对中压(MV)线路的影响以前被认为是可以忽略不计的，因为线路和CC闪电通道之间的距离[1]。在一项研究[2]中，为了区分附近的云对地(CG)闪电和对714公里(包括分支)22千伏线路的直接雷击，在只有CC闪电存在的情况下，也测量了与闪电相关的线路故障。对这些线路故障进行了研究，并建立了网络和CC闪电模型。发现故障是由连击雷击引起的，而闪络是由于湿爬电距离不足引起的，而不是由于基本绝缘等级(BIL)不足引起的。

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The Effect of Cloud-to-Cloud Lightning on Medium Voltage Lines

The effect of Cloud-to-Cloud (CC) lightning on Medium Voltage (MV) lines has previously been assumed to be negligible due to the distance between the line and the CC lightning channel [1]. During a study [2] to distinguish between nearby Cloud-to-Ground (CG) lightning and direct lightning strikes to a 714 km (including branches) 22 kV line, lightning-related line faults were measured also where only CC lightning was present. These line faults were investigated and the network and CC lightning were modelled. It was found that the faults were initiated by CC lightning but that the flashover could be attributed to insufficient wet creepage distance and not due to insufficient Basic Insulation Level (BIL).

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2022 36th International Conference on Lightning Protection (ICLP)

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