高海拔交流输电线路金具电晕放电特性  

Corona Discharge Characteristic for Fittings of High Altitude AC Transmission Line

作　　者：曹晶[1,2] 张勤[2] 杨迎建[2] 周文俊[1] 谢梁[2] 谷莉莉[2] 

机构地区：[1]武汉大学电气工程学院,武汉430072 [2]国网电力科学研究院,武汉430074

出　　处：《高电压技术》2011年第12期2924-2929,共6页High Voltage Engineering

基　　金：国家电网公司科技项目(SG10061)~~

摘　　要：电晕特性是输电线路工程设计及运行必须考虑的重要方面。高海拔地区,金具电晕放电带来的电磁环境问题越来越受到关注,为获得高海拔输电线路金具电晕放电特性及海拔校正方法,在特高压交流试验基地环境气候实验室以及西藏高海拔试验基地,利用紫外成像仪对不同种类330kV交流输电线路金具开展起晕电压特性试验研究,获得模拟海拔以及实际海拔下典型金具起晕电压试验值。分析比较国内外多种海拔校正方法,给出了试验数据对应的校正误差。研究结果表明,金具起晕电压随海拔增高近似呈线性递减规律,受到电极结构影响,不同形式金具电晕放电特性有一定差异。同时,结合不同模拟海拔高度下试验数据拟合得到线性和指数形式海拔校正算式,两者校正误差小于现有标准推荐方法,校正误差绝对值可以控制在5%以内。The problems of electromagnetic environment caused by corona discharge from fittings are more and more concerned at high altitude area in recent years.In order to acquire the corona discharge characteristics and altitude correction methods for fittings of high altitude 330 kV AC transmission line,the research work of inception voltage for different fittings were experimentally performed respectively both at climate laboratory in Ultra-high Voltage Test Base in Wuhan and High Altitude Test Base in Tibet.The phenomenon of corona discharge was detected and recorded by ultraviolet image apparatus,and correction errors of test results were given in accordance with the existing standards.It is indicated that the corona inception voltage for fittings decreases with the rise of altitude to the sea level,and corona discharge characteristic is affected by the electrode type.Formulae of linear form and exponential form based on the test results at different simulated altitudes are obtained,by which the correction errors are lower than those of the existing standards and the absolute value of correction errors can be controlled at less than 5 percent.

关 键 词：高海拔 线路金具 电晕放电 电磁环境 起晕电压 紫外成像仪 海拔校正 

分 类 号：TM851[电气工程—高电压与绝缘技术]