交流电压下架空输电线路巢材类异物放电特性研究  

Research on Discharge Characteristics of Foreign Bodies of Nest Material of Overhead Transmission Line under AC Voltage

作　　者：王胜辉[1] 郭奉天 董兴浩 王玺铭 律方成[1] 李浩 WANG Shenghui;GUO Fengtian;DONG Xinghao;WANG Ximing;LYU Fangcheng;LI Hao(School of Electrical and Electronic Engineering,North China Electric Power University,Beijing 102206,China;Baoding Power Supply Company of State Grid Hebei Electric Power Co.,Ltd,Baoding 071000,China)

机构地区：[1]华北电力大学电气与电子工程学院,北京102206 [2]国网河北省电力有限公司保定供电分公司,河北保定071003

出　　处：《华北电力大学学报（自然科学版）》2022年第5期24-32,共9页Journal of North China Electric Power University：Natural Science Edition

基　　金：河北省重点研发计划项目(19212109D);国家重点研发计划(2018YFF01011900)。

摘　　要：鸟巢类故障是涉鸟故障中造成输电线路跳闸的主要原因之一,为研究巢材闪络与雨水的电导率、巢材的长度及其空间位置等因素的关系,论文测量了不同种类及湿度下巢材的电阻,研究了影响巢材导电性能的因素;模拟巢材在杆塔上的情况,研究了导线-杆塔间隙中有巢材时的闪络特性;建立了110 kV酒杯型杆塔边相的三维仿真模型,研究了巢材对空气间隙电场畸变的影响。结果表明:喷淋在巢材上的雨水模拟液电导率越大,其在固定间隙距离下的间隙击穿电压和击穿场强越小;严重情况下,巢材与均压环的击穿平均场强为3.96 kV/cm,可以等效为棒-棒间隙的击穿过程。论文研究结论可为输电线路鸟巢类故障防治和闪络预警提供一定的参考依据。Birds nesting is the main reason for the electric transmission lines trip in China.In order to investigate the relationship between the flashover and the electrical conductivity of rainwater,the length of the nest material and its spatial position,the factors influencing the conductivity of the nest material were studied by measuring the resistance of different types of nesting material under different humidity.Then,various situations of nest material setting on the tower were simulated to study AC flashover performance when nest material was in the line-tower gap.Finally,to study the influence of the nest material on the electric field distortion of air gap,a three-dimensional simulation model of the side phase of the 110 kV glass-shaped tower was established.The results show that,under a fixed gap distance,the larger conductivity of the simulated rainwater is,the smaller the gap breakdown voltage and breakdown field strength are.In severe cases,the breakdown field strength is 3.96 kV/cm,and the flashover process can be equivalent to the breakdown process of the rod-rod gap.The results can provide reference for the prevention of transmission line faults and flashover pre-warning caused by nest material.

关 键 词：鸟害 巢材 闪络特性 间隙击穿 电场仿真 

分 类 号：TM85[电气工程—高电压与绝缘技术]