浙江电力

2020, v.39;No.294(10) 14-20

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500 kV交直流混架塔防雷性能分析
Lightning Protection Performance Analysis of 500 kV AC/DC Hybrid Towers

柏丹丹,王睿,施芳,戴雨剑
BAI DANDan,WANG Rui,SHI Fang,DAI Yujian

摘要(Abstract):

交直流多回混架输电铁塔极大地压缩了线路走廊,是应对当今走廊日益紧缺的一种有效举措,但混架后铁塔高度增加、排布方式多变又导致了其耐雷水平异于常规直流线路或交流线路。对此,在兼顾塔型设计、使用环境、绝缘配置等需求的基础上,围绕8种典型的交直流混架塔型,利用行波法和EGM(电气几何模型法)分析了反击跳闸率、绕击跳闸率以及综合耐雷水平,并与单独架设的500 kV交流、±500 kV直流线路的耐雷水平进行比较,研究表明所述±500 kV/500 kV交直流混架塔的耐雷性能主要由交流线路决定,在平原地区所有塔型基本都能满足相关规程规范的防雷要求。
As an effective measure to deal with the increasing shortage of corridors, hybrid AC-DC multi-circuit transmission tower greatly compresses the line corridor. However, the increase of tower height and the change of layout mode lead to the difference of lightning resistance level from either AC or DC lines. Considering the requirements of tower design, service environment, insulation configuration and other aspects, this paper focuses on eight typical AC/DC hybrid tower types and analyze the shielding failure rate, back flashover rate and comprehensive lightning resistance level using traveling wave method and EGM(electrical geometry model) method, and compares the lightning withstand levels of separately erected 500 kV AC lines and ±500 kV DC lines. The research shows that the lightning resistance performance of the said ±500 kV/500 kV AC/DC hybrid tower is largely determined by the AC lines, and all tower types in the plain areas can meet the requirements of lightning protection specifications and norms.

关键词(KeyWords): 交直流混架塔;绕击;反击;耐雷水平
AC/DC hybrid tower;shielding failure;back flashover;lightning withstand level

Abstract:

Keywords:

基金项目(Foundation): 中国能源建设集团规划设计有限公司科研项目(GSKJ2-D04-2019)

作者(Author): 柏丹丹,王睿,施芳,戴雨剑
BAI DANDan,WANG Rui,SHI Fang,DAI Yujian

DOI: 10.19585/j.zjdl.202010003

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