Weight Analysis of Lightning Disaster Factors and High Risk Tower Identification for ±1 100 kV Jiquan Line

doi:10.11930/j.issn.1004-9649.202107064

Abstract

Abstract: Lightning disaster factors for transmission lines mainly include lightning parameters, landforms, insulation configuration and earth resistance, but their weight values for lightning risk are hard to be obtained for a certain transmission line. In this paper, an in-depth analysis is made of the lightning disaster factors for the ±1 100 kV Jiquan line. By using the analytic hierarchy process for lightning disaster risk evaluation, the weight of each disaster factor is obtained through calculating their membership and establishing judgment matrices. The results show that lightning density, lightning current amplitude and protection angle are main disaster factors with high weight values for lightning risk, and their weight values are 0.420, 0.247, 0.147 respectively. Based on the disaster factors with high weight values, the aggregation analysis method is used to identify the towers with high lightning risks, which has provided a important basis for formulating lightning protection strategy for Jiquan Line. Compared with the differential lightning risk evaluation on every tower, the proposed method in this paper can rapidly identify the towers with high risk of lightning, thus significantly reducing the tedious work. This method is applicable to lightning risk evaluation for the transmission lines with long distance or for a large number of transmission lines.

Key words: ±1 100 kV Jiquan Line, lightning disaster factor, analytic hierarchy process, weight analysis, lightning risk

REN Hua, LI Jian, MI Xiao, GU Shanqiang, WANG Jian, WU Min, CAO Wei, ZHANG Rui. Weight Analysis of Lightning Disaster Factors and High Risk Tower Identification for ±1 100 kV Jiquan Line[J]. Electric Power, 2022, 55(2): 115-124.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202107064

https://www.electricpower.com.cn/EN/Y2022/V55/I2/115

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