中国电力 ›› 2015, Vol. 48 ›› Issue (1): 98-103.DOI: 10.11930.2015.1.98

• 电网 • 上一篇    下一篇

山区特高压交流输电线路用边坡塔的设计

宋刚,陈稼苗,郭勇   

  1. 浙江省电力设计院,浙江 杭州 310012
  • 收稿日期:2014-10-21 出版日期:2015-11-25 发布日期:2015-11-24
  • 作者简介:宋刚(1983—),男,浙江杭州人,硕士,工程师,从事高压线路电气设计研究。E-mail: songgang130@sina.com

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

SONG Gang, CHEN Jiamiao, GUO Yong   

  1. Zhejiang Electric Power Design Institute, Hangzhou 310012, China
  • Received:2014-10-21 Online:2015-11-25 Published:2015-11-24

摘要: 雷电绕击是特高压线路发生故障的主要原因,特别在山区走线时由于雷电活动频繁,大地屏蔽作用差,雷击跳闸率更高。为降低特高压线路雷电绕击跳闸率,提出一种适用于山区特高压交流单回输电线路的边坡塔。与常规酒杯塔相比,边坡塔将两相导线横担布置在下山坡侧,降低了下山坡侧导线对地高度,通过电气几何模型法计算得出绕击跳闸率大大降低;同时通过结构受力分析、电磁环境比较、工程造价对比,表明了边坡塔的多方面优势,该塔型适用于多雷山区特高压单回路输电线路,为山区特高压交流线路的防雷设计提供参考。

关键词: 特高压交流, 边坡塔, 绕击跳闸率, 电气几何模型

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

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