Study on Lightning Protection by Multi-band Grounding Wires for 1 000-kVDouble-Circuit Lines

doi:10.11930/j.issn.1004-9649.2013.3.24.5

Abstract

Abstract: In order to make the UHV double-circuit transmission lines run safer and more reliable, a scheme was proposed for neighboring tension tower’s coordination with multi-band grounding wires on double-circuit tangent tower by taking the SZC301 double-circuit tangent tower and SJC301 double-circuit tension tower of one domestic 1 000 kV AC transmission line project as a case study. The influence of different arrangement and combination of “I” string and“V” string of double-circuit tangent towers were synthetically analyzed on the interval between conductor and multi-band lightning wires. If the “V” string is hung up in the middle cross-arm on double-circuit tangent tower, and one lightning wire is hung up in the lower cross-arm, the static lightning protection shielding angle of the middle outer sub-conductor and lower outer sub-conductor on the tower head will be reduced by 11°and 15° respectively, and the dynamic lightning protection shielding angle of the three (upper, middle and lower)-phase outer sub-conductors are -11°and -20°and -9° respectively, which has effectively reduced the influence of the terrain slope on shielding failure rate.

Key words: 1 000 kV, double-circuit tangent tower, double-circuit tension tower, “I”, string, “V”, string, multi-band grounding wires, lightning protection

CLC Number:

TM752⁺.5

WANG Mao-cheng, WANG Xiao-han, ZHANG Bo, ZHANG Yong. Study on Lightning Protection by Multi-band Grounding Wires for 1 000-kVDouble-Circuit Lines[J]. Electric Power, 2013, 46(3): 24-29.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2013.3.24.5

https://www.electricpower.com.cn/EN/Y2013/V46/I3/24

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