Design of Slope Tower Used in 1 000 kV UHVAC Transmission Line in Mountainous Area

doi:10.11930/j.issn.10.11930.2015.1.98

Abstract

Abstract: The lightning shielding failure is the main cause of UHVAC transmission line fault，especially when it travels through mountainous area where lighting activities are frequent and the shielding effect is poor, the lightning trip out rate is higher. In order to reduce the rate of lightning shielding failure, a new type of tower called slope tower used in UHVAC single circuit transmission line in mountainous area was introduced in this paper. Compared with the conventional cup type tower, the cross arms of two phase conductors of slope tower are arranged on the downhill side, which can reduce the distance from conductor to ground, and the shielding failure trip out rate calculated by Electric Geometry Method can be greatly reduced. An analysis of the internal structure force, the electromagnetic environment level and the project cost shows that the slope tower has many advantages and is applicable to UHVAC single circuit transmission lines in mountainous area with heavy lightning, and it can provide a reference for the lightning protection design of UHVAC transmission line in mountainous area.

Key words: UHVAC, slope tower, shielding failure flashover rate, electric geometry method

CLC Number:

TM726
TM753

SONG Gang, CHEN Jiamiao, GUO Yong. Design of Slope Tower Used in 1 000 kV UHVAC Transmission Line in Mountainous Area[J]. journal1, 2015, 48(1): 98-103.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.10.11930.2015.1.98

https://www.electricpower.com.cn/EN/Y2015/V48/I1/98

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