空气温度对电晕笼中导线直流电晕特性的影响  

Effect of Air Temperature on DC Conductor Corona Performance in Corona Cage

作　　者：王伟[1] 丁燕生[2] 李成榕[1] 黎小林 罗兵 于壮状[1] 安冰[1] 王益旭[1] 杨波[1] 樊飞[1] 

机构地区：[1]华北电力大学高压与电磁兼容北京市重点实验室,北京102206 [2]国家电网公司建设运行部,北京100031 [3]南方电网技术研究中心,广州510620

出　　处：《高电压技术》2009年第3期613-617,共5页High Voltage Engineering

基　　金：国家“十一五”科技支撑计划重大项目(2006BAA02119)~~

摘　　要：为研究空气温度对导线直流电晕特性的影响,建立了导线直流电晕特性测试系统,定义了导线的起晕电压,在人工气候室内,测量了不同空气温度下电晕笼中导线的起晕电压、电晕电流、可听噪声水平等特征量,获得了空气温度对导线电晕特性的影响规律。试验结果表明:导线的起晕电压随空气温度的升高大致呈线性下降趋势;导线电晕电流在起晕后随空气温度的升高大致呈线性上升趋势;负极性导线电晕可听噪声水平随空气温度的升高而上升,且电压越高上升幅度越大;由于赫姆斯坦辉光过程的存在,正极性导线电晕可听噪声水平的空气温度修正系数在不同的电压时有不同的表现,并据此对我国特高压直流输电线路的工程设计提出了建议。In the design of EHV or UHV DC transmission lines, corona performance was one of the most important factors. ±800 kV UHV DC transmission lines of China would cross some high altitude area, air temperature around the lines would change greatly. It is necessary to research the effect of air temperature on corona performance of DC conductor. Consequently, a conductor DC corona performance test system was set up and put in a manual environment room, corona inception voltage was defined; meanwhile, corona inception voltage, corona current and audible noise level of DC conductor were measured in different air temperature in corona cage, the influence of air temperature on DC conductor corona performance was observed, and a reference for engineering design of UHV DC transmission line was suggested too. Test results show that corona inception voltage decreases almost linearly with the air temperature increases; Corona current increases linearly with the air temperature increases after corona inception; Audible noise level of negative conductor increases with the air temperature increases, and becomes more observable at higher voltage; Effect of air temperature on audible noise of positive conductor are different at different voltage because of the Hemusitan glow.

关 键 词：空气温度 电晕笼 直流 起晕电压 电晕电流 可听噪声 

分 类 号：TM851[电气工程—高电压与绝缘技术]