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- W2373204619 abstract "According to the operation data abroad,the tripped-out accidents caused by shielding failure amount to a large percentage of the tripped-out accidents caused by lightning strike on the UHV AC transmission lines.Based on the discharge theories of long air gap,a leader propagation model on lightning shielding failure is presented in this paper.The leader propagation process and the selection of the lightning striking point are assumed to be related with the space electric field distribution around the transmission lines in this model.The initiation of the upward leader from the transmission lines and the final jump between the upward and downward leaders are determined respectively by the electric field calculation on the transmission lines and the air gap between the upward and downward leaders.Based on this model,a calculation program on the estimation of lightning shielding performance of transmission lines is built in this paper.With this program,the lightning shielding performance of Yun-Guang ±800kV UHV DC transmission lines to be constructed is calculated.The results indicate that the shielding failure radio will increase with the increment of the slope angle and the shielding angle.Therefore,the negative shielding angle is suggested to be adopted in UHV DC transmission lines." @default.
- W2373204619 created "2016-06-24" @default.
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- W2373204619 date "2008-01-01" @default.
- W2373204619 modified "2023-09-24" @default.
- W2373204619 title "Research on the Lightning Shielding Performance of the Yun-Guang UHVDC Transmission Lines" @default.
- W2373204619 hasPublicationYear "2008" @default.
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