电瓷避雷器Issue(4)：46-54,9.DOI:10.16188/j.isa.1003-8337.2024.04.006
大理典型密集输电通道雷击特性分析
Lightning Strike Characteristics of Typical Dense Transmission Lines in Dali
摘要
Abstract
The typical dense transmission lines in Dali area were selected as the research objects.Accord-ing to the actual structure and parameters of the lines,a calculation model of lightning strike overvoltage was established.By calculating the lightning resistance level of each line,the weak sections of lightning protection for the dense lines were obtained.The electromagnetic coupling characteristics of the crossover line and the influence of the upper line on the lower crossover line under the lightning strike conditions were analyzed.The shielding effect of lightning between adjacent lines was studied,and the shielding failure trip-out rate of compact parallel lines was calculated considering the lightning shielding effect.The result shows that the lightning resistance level of each line is quite different due to the influence of the grounding resistance of the tower.When the lightning strikes the upper Yangli Ⅰ line,it will not cause the flashover trip of the lower crossover Jianhe line.When the distance between the Jianhe line and Yang-he Ⅰ line is 40 meters,considering the lightning shielding effect,the lightning trips are reduced by 52.18％and 41.2％respectively.关键词
密集输电线路/绕击跳闸率/交叉跨越线路/雷击特性/雷电屏蔽Key words
dense transmission lines/shielding failure trip-out rate/crossover line/lightning strike characteristics/lightning shield引用本文复制引用
李彦锋,杨岩,杨延斌,杨振邦,周春天,黎鹏..大理典型密集输电通道雷击特性分析[J].电瓷避雷器,2024,(4):46-54,9.基金项目
云南电网有限责任公司科技项目(编号:YNKJXM20210122).Project supported by Yunnan Power Grid Co.,Ltd.Technology Project(No.YNKJXM20210122). （编号:YNKJXM20210122）
