Lightning protection level for 500 kV high altitude transmission lines in the Tibet power grid and Sichuan power grid interconnection project

被引：0
|
作者：
Chen X. [1 ]
Xia C. [1 ]
Yin Y. [1 ]
Wang C. [2 ]
Zhang Y. [2 ]
Liang M. [3 ]
机构：
[1] China Electric Power Research Institute, Beijing
[2] Southwest Branch, State Grid Corporation of China, Chengdu
[3] Southwest Electric Power Design Institute Co., Ltd., China Power Engineering Consulting Group Co., Ltd., Chengdu
来源：
Gaodianya Jishu/High Voltage Engineering | 2016年 / 42卷 / 05期
关键词：
Annual thunderstorm; Lightning protection level; Lightning shielding failure; Lightning strike; Lightning trip rate; The Tibet power grid and Sichuan power grid interconnection project;
D O I：
10.13336/j.1003-6520.hve.20160412027
中图分类号：
学科分类号：
摘要：
The Tibet power grid and Sichuan power grid interconnection project is an important livelihood project connecting Sichuan power grid and Tibet grid. 500 kV transmission line was divided into two parts. One is from Xiangcheng to Batang, another is from Batang to Changdu, where more lightning activities arise, and the highest elevation is 5 000 m. In order to research the lightning performances, we analyzed the lightning trip of the Tibet power grid and Sichuan power grid interconnection project in recent years, and researched the lightning performances of 500 kV transmission lines from Xiangcheng to Batang and lines from Batang to Changdu. Moreover, we put forward the calculation methods for lightning shielding failure and lightning strike, and calculated and statistically analyzed the lightning trip rate in detail. Calculation results indicated that lightning trip rates for such two lines were 0.24 and 0.17 time per 100 km annually, respectively, and two rates were more than 0.14 time per 100 km annually. In order to increase the lightning protection safety margin, it was needed to take some line lightning protection measures. If line arresters were installed on towers and phases, lightning trip rates of such two lines could be reduced to 0.13 and 0.11 time per 100 km annually. Research results can provide guidance for design and construction of transmission line in high altitude for Tibet network project, and have important significance for improving the lightning protection performance of transmission lines in high altitude. © 2016, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：1535 / 1540
页数：5
相关论文
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