摘要
为评估超高压输电线路的绕击耐雷性能,文中根据上行先导的起始和发展原理,建立利用感应电荷分析的先导发展模型,并通过仿真分析感应电荷密度对上行先导起始的影响.最后,对超高压输电线路的绕击耐雷性能进行分析.分析结果表明:线路运行电压影响着导线上行先导的起始,但对避雷线上行先导的影响很小;输电线路绕击跳闸率随着地面倾角和线路保护角的增大而大幅增加;随着海拔高度的增加,上行先导起始时的下行先导头部高度将有所降低.
In order to evaluate the lightning protection performance of UHV transmission lines,a leader development model based on the induction charge analysis is established according to the upward leader,and the influence of induced charge density on the initiation of upward leader is analyzed by simulation.Finally,the lightning protection performance of UHV transmission line is analyzed.The analysis results show that the line operating voltage at different phase angles has a great influence on the initiation of the upward leader of the line,but has little influence on the upward leader of the lightning line;the round trip rate of the transmission line increases greatly with the increase of the ground inclination and the line protection angle;With the increase of altitude,the height of the head of the down leader at the beginning of the up leader will decrease.
作者
王永利
耿御缤
Wang Yongli;Geng Yubin(State Grid Jilin Electric Power Company Limited Jilin Power Supply Company,Jilin Jilin 132011;Electrical Engineering College Northeast Electric Power University,Jilin Jilin 132012)
出处
《东北电力大学学报》
2020年第6期21-27,共7页
Journal of Northeast Electric Power University
基金
国网吉林省电力有限公司科技项目(2018-6)。
关键词
先导发展模型
绕击跳闸率
输电线路
上行先导
Model of leader development
Shielding failure trip rate
Transmission line
Upward leader
