500kV交流支柱绝缘子的冰闪特性  

Icing Flashover Characteristics of 500 kV AC Post Insulators

作　　者：刘云鹏[1,2] 许佐明[2] 胡毅[2] 万启发[2] 邬雄[2] 蔡炜[2] 姚涛[2] 徐涛[2] 路杰[1] 黄道春[3] 

机构地区：[1]华北电力大学电气工程系,保定071003 [2]国网电力科学研究院,武汉430074 [3]武汉大学电气工程学院,武汉430072

出　　处：《高电压技术》2010年第7期1638-1643,共6页High Voltage Engineering

基　　金：国家"十一五"科技支撑计划重大项目(2006BAA02A03);国家电网公司重大科研项目(SG0858)~~

摘　　要：绝缘子覆冰是一种特殊形式的污秽,由于覆冰、污秽、高海拔等因素的影响,绝缘子的绝缘性能显著降低。为进一步研究超高压支柱绝缘子的冰闪特性,在特高压交流试验基地大型气候室内,带电覆冰情况下对500kV支柱绝缘子进行了冰闪试验研究,分析了带电覆冰对500kV支柱绝缘子覆冰状态的影响,和500kV支柱绝缘子放电过程以及预污染不同污秽度对500kV支柱绝缘子冰闪电压的影响。研究表明:在盐密ρSDD=0.1、0.05、0.025mg/cm2重覆冰情况下,500kV支柱绝缘子较额定运行电压分别约低28%、低15.1%、高6.1%。研究结果可为我国重冰区变电站支柱绝缘配置提供参考。In order to analyze the icing flashover characteristics of post insulators,the icing flashover characteristics of energized 500 kV post insulators were studied in a large scale artificial climate chamber at ultra high voltage （UHV）AC test base of SGCC. The state of icing,the discharge process of 500 kV post insulators and influence of pollution were discussed. The research results indicate that,under the ρSDD=0.1,0.05,0.025 mg/cm2 and the heavy icing conditions,the flashover voltages of 500 kV post insulators are 28% lower,15.1% lower and 6.1% higher than the 500 kV rated phase to earth voltage ,respectively; The research results can be used as reference for the post insulators icing flashover characteristics tests and external insulation coordination of transformer substation in the heavy icing regions of China.

关 键 词：超高压 支柱绝缘子 覆冰 污秽 冰闪电压 放电过程 

分 类 号：TM216[一般工业技术—材料科学与工程]