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考虑多因素影响的大理密集输电线路绕击跳闸率计算方法
Calculation Method of Shielding Failure Trip-out Rate of Dali Dense Transmission Channels Considering Multiple Factors
- 高压电器 2025年 页码：1-9
- 作者机构：
1.三峡大学湖北省输电线路工程技术研究中心，湖北 宜昌 443002
2.三峡大学电气与新能源学院，湖北 宜昌 443002
3.云南电网公司输电分公司，云南 大理 650032
4.国网湖北省电力有限公司孝感供电公司，湖北 孝感 432100
- 作者简介：
周春天（1999—），男，硕士研究生，主要从事高电压与绝缘技术研究（E-mail：617592593@qq.com）。
- 基金信息：
DOI：
中图分类号：-
纸质出版日期：
- 稿件说明：
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周春天, 张文锋, 林敢, 等. 考虑多因素影响的大理密集输电线路绕击跳闸率计算方法[J/OL]. 高压电器, 2025,1-9.
ZHOU Chuntian, ZHANG Wenfeng, LIN Gan, et al. Calculation Method of Shielding Failure Trip-out Rate of Dali Dense Transmission Channels Considering Multiple Factors[J/OL]. High voltage apparatus, 2025, 1-9.
摘要
为提高密集输电线路绕击跳闸率计算的准确性，以大理地区典型密集输电通道为研究对象，引入雷电入射角和地形倾角两个影响因素，研究了交叉跨越线路间的雷电屏蔽作用，搭建了改进的三维电气几何模型，计算了同塔双回输电线路的绕击跳闸率。结果表明：由于各线路段的杆塔结构和地闪密度差异较大，其绕击跳闸率相差较大；考虑雷电屏蔽作用时，两密集输电线路段的绕击跳闸率分别为0.852 5、2.297 1次/100（km·a），与不考虑雷电屏蔽作用相比，分别减小了0.107 7、0.089 9次/100（km·a）。
Abstract
In order to improve the accuracy of calculation of shielding failure trip-out rate of dense transmission lines
this study used the typical densely-packed transmission channel in Dali region as the research object and introduced two influencing factors
namely
lightning incidence angle and terrain tilt angle. The study investigated the lightning shielding effect between crossing transmission lines and constructed an improved three-dimensional electrical geometric model to calculate the shielding failure trip-out rate of double-circuit transmission lines on the same tower. The results show that the shielding failure trip-out rate of each line varies greatly due to the great difference of tower structure and ground flash density. When considering the lightning shielding effect between the crossing lines
the shielding failure trip-out rate of the two dense transmission lines are 0.852 5 and 2.297 1 times/100 (km·a)
which are reduced by 0.107 7 and 0.089 9 times/100 (km·a) compared with that without considering the lightning shielding effect.
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references
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