湿度对棒-板间隙电晕特性的影响规律  

Influence of Humidity on the Corona Characteristics of the Bar-Plate Gap

作　　者：谢梁 花广如 崔云骧 罗红健 刘云鹏[3] 黄世龙 XIE Liang;HUA Guangru;CUI Yunxiang;LUO Hongjian;LIU Yunpeng;HUANG Shilong(State Key Laboratory of Power Grid Environmental Protection,China Electric Power Research Institute,Wuhan 430074,China;Hebei Key Laboratory of Electric Machinery Health Maintenance&Failure Prevention,Baoding,Hebei 071003,China;Department of Electric Engineering,North China Electric Power University,Baoding,Hebei 071003,China)

机构地区：[1]中国电力科学研究院有限公司电网环境保护国家重点实验室,武汉430074 [2]河北省电力机械装备健康维护与失效预防重点实验室,河北保定071003 [3]华北电力大学电力工程系,河北保定071003

出　　处：《南方电网技术》2021年第7期90-95,共6页Southern Power System Technology

基　　金：国家电网有限公司Headquarters科技项目资助(GY71-18-017)。

摘　　要：针对高湿度地区输变电金具易发生电晕的问题,通过对棒-板电极的电场进行仿真和不同湿度下棒-板电极起晕实验,研究了湿度对棒-板电极电晕特性的影响规律。结果表明:当棒-板间隙存在微粒,其电场分布会发生明显的畸变,在湿度较大时,根据微粒连线方向与棒电极头部射线方向是否相同,微粒的存在对电场表现出不同作用,同向时,促进流柱的发展,垂直时,阻碍流柱的发展;在相对湿度30%~60%范围内,起晕电压随相对湿度的增大而减小,在相对湿度60%~85%范围内,起晕电压随相对湿度的增大而增大,但增大的幅值较小。对于不同的电极,起晕电压与相对湿度的关系表现出相同的趋势。Aiming at the problem of corona occurrence of power transmission and transformation fittings in high humidity areas,the influence of humidity on the corona characteristics of the rod-plate electrode is studied by simulating the electric field of the rod-plate electrode and the corona of the rod-plate electrode under different humidity law.The results show that when there are particles in the gap between the rod and the plate,the electric field distribution will be significantly distorted.When the humidity is high,depending on whether the connection direction of the particles is the same as the ray direction of the tip of the rod electrode,the presence of particles has a different effect on the electric field.When in the same direction,the presence of particles will promote the development of the flow column;when it is perpendicular,the presence of particles will hinder the development of the flow column;In the range of relative humidity of 30%~60%,the corona initiation voltage decreases with the increase of relative humidity.In the range of relative humidity of 60%to 85%,the voltage increases with the relative humidity,but the amplitde is smaller.For different electrodes,the relationship between corona initiation voltage and relative humidity shows the same trend.

关 键 词：湿度 棒-板电极 电场仿真 光子数 电晕特性 

分 类 号：TM85[电气工程—高电压与绝缘技术]