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Shielding failure of lightning is the key problem for safe operation of UHV transmission lines. Taking the feature of 1000KV AC double circuit transmission lines into account, the leader progression method with proper criterion was employed. The lightning shielding failure rate of top phase, middle phase and bottom phase of two different transmission line tower types were compute, in three different...
This paper introduced the lightning protection design of the first 1000-kV UHV transmission line in China. The analysis is based on the lightning leader propagation model by considering the lightning propagation process, which can consider the randomness of lightning process. The new phenomenon of middle-phase shielding failure was explained when two grounding wires are wide, and the side-phase shielding...
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