基于先导发展模型的绝缘子闪络判据研究  

Research on Insulator Flashover Criterion Based on Leading Progression Model

作　　者：梁记云 王永利 李金彪 冯欣楠 Liang Jiyun;Wang Yongli;Li Jinbiao;Feng Xinnan(Electrical Engineering College,Northeast Electric Power University,Jilin Jilin 132012;State Grid Jilin Electric Power Company Limited Jilin Power Supply Company,Jilin Jilin 132012)

机构地区：[1]东北电力大学电气工程学院,吉林吉林132012 [2]国网吉林省电力有限公司吉林供电公司,吉林吉林132012

出　　处：《东北电力大学学报》2021年第5期74-79,共6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)。

摘　　要：架空线是跨地区长距离传输电能的重要通道,其输电线路极长,高度与工作电压较高,易受雷击,因此有必要对其耐雷性能进行分析.考虑相交法采用的绝缘子伏秒特性的缺点,文中基于先导发展法重新构建220 k V绝缘子串的伏秒特性,复现了通化地区某线路的雷击故障情况,并与采用相交法得到的耐雷水平进行对比,同时分析了接地电阻对耐雷水平的影响.结果表明,先导发展判据更能贴近雷击现象的本质,得到的结果符合实际运行经验,在防雷保护中杆塔应采用较小的接地电阻值来提高其耐雷水平.Overhead lines are an important channel for long-distance transmission of electrical energy across regions.Their transmission lines are extremely long,have high height and high working voltage,and are susceptible to lightning strikes.Therefore,it is necessary to analyze their lightning resistance performance.Considering the shortcomings of using the intersection method to obtain the volt-second characteristics of insulators,this paper reconstructs the volt-second characteristics of the 220 kV insulator string based on the pilot development method,reproduces the lightning fault situation of a line in Tonghua area,and compares it with the lightning resistance level obtained by the intersection method.At the same time,the influence of grounding resistance on lightning resistance level is analyzed.The results show that the pilot development criterion is closer to the nature of lightning strikes,and the results obtained are in line with actual operating experience.In lightning protection,poles and towers should use a smaller grounding resistance value to improve their lightning resistance level.

关 键 词：架空线路 耐雷水平 伏秒特性 先导法判据 

分 类 号：TM863[电气工程—高电压与绝缘技术]