高湿度环境下特高压交流均压环电晕放电特性实测与仿真研究  

Experimental and Simulation Study of Corona Discharge Characteristics of Ultra-High Voltage AC Corona Rings in High Humidity Environment

作　　者：吴军 王身丽 杜勇 张鼎 张珣 谢梁 WU Jun;WANG Shenli;DU Yong;ZHANG Ding;ZHANG Xun;XIE Liang(Maintenance Company,State Grid Hubei Electric Power Co.,Ltd.,Wuhan 430050,China;State Key Laboratory of Power Grid Environmental Protection,China Electric Power Research Institute,Wuhan 430074,China)

机构地区：[1]国网湖北省电力有限责任公司检修公司,武汉430050 [2]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

出　　处：《电瓷避雷器》2024年第6期20-27,共8页Insulators and Surge Arresters

基　　金：国家电网公司总部科技项目(编号.5500-201947423A-0-0-00)。

摘　　要：西电东送的极端气象条件使得特高压金具电晕问题更加突出,特别是在高湿度、高海拔或污染等特殊环境下,金具电晕问题的风险更加显著。我国西南地区气候潮湿,在夏季相对湿度可高达90%,其他季节相对湿度也保持在50%以上。高湿度环境中的水分子增加了电晕放电的概率,常规特高压金具难以满足高湿度环境下的电晕控制要求,因而需开展金具在高湿度环境下的电晕放电特性研究。文中针对70%以上高湿度条件下金具可见电晕试验电压修正缺乏依据的问题,建立了湿度可调的电晕放电试验平台,开展了均压环电极在不同湿度条件下的可见电晕试验,获取了不同湿度下的均压环电晕放电特性,并对均压环表面起晕电场进行仿真计算和分析。基于高湿度环境下的均压环试验特性和仿真结果,提出高湿度下均压环电晕电压修正方法和电晕控制方法,为特殊环境下均压环防晕设计提供了理论依据和数据支撑。The extreme weather conditions caused by power transmission from the west to the east have made the problem of corona discharge on ultra-high voltage fittings more prominent.In the southwest regions of China,the climate is characterized by high humidity,with relative humidity levels reaching up to 90%during the summer and consistently remaining above 50%throughout other seasons.The increased presence of water molecules in high-humidity environment enhances the probability of corona discharges.Conventional ultra-high voltage equipment faces challenges in meeting the requirements of corona control in high-humidity conditions.Therefore,it is essential to investigate the corona discharge characteristics of corona rings in high-humidity environment.This study addresses the issue of the lack of a basis for voltage correction in visible corona tests of corona rings under humidity conditions exceeding 70%.We have established an adjustable humidity test platform with typical electrode configurations,conducted visible corona tests on corona rings under varying humidity conditions,and obtained the corona discharge characteristics of corona rings at different humidity levels.Additionally,we have performed simulation calculations and analyses of the electric field on the surface of the corona rings.Based on the experimental findings and simulation results in high-humidity environments,some methods are proposed for voltage correction and corona control of corona rings,providing a theoretical foundation and data support for the design of corona-resistant corona rings in special environment.

关 键 词：高湿度 电晕放电 均压环 电压修正 电场计算 

分 类 号：TM855[电气工程—高电压与绝缘技术]