染污方式对覆冰瓷和玻璃绝缘子直流闪络特性的影响  

Effect of Pre-polluting Methods on DC Flashover Characteristics of Artificially Iced Porcelain and Glass Insulators

作　　者：舒立春[1] 杨剑蓝[1] 蒋兴良[1] 张志劲[1] 周仿荣[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400030

出　　处：《高电压技术》2009年第6期1294-1300,共7页High Voltage Engineering

基　　金：国家自然科学基金面上项目(50807056) ;国家重点基础研究发展计划(973计划)(2009CB724502)~~

摘　　要：绝缘子覆冰是一种特殊形式的污秽,一般来说覆冰前绝缘子表面存在污秽才会导致绝缘子在运行电压下发生冰闪。如何模拟和表征污秽对绝缘子冰闪电压的影响是防冰抗冰设计的基础,因此根据多功能人工气候室的试验结果探讨了染污方式,即固体涂层法染污或覆冰水电导率染污对瓷和玻璃绝缘子覆冰直流电压的影响,分析了人工覆冰绝缘子两种染污方式之间的关系。研究结果表明:在对冰闪电压的影响上,两种染污方式存在等价性;染污方式对覆冰绝缘子的放电路径有影响,固体涂层法染污的瓷和玻璃绝缘子冰闪路径沿着绝缘子表面,覆冰水电导率模拟污秽时,放电沿着冰层外表面;覆冰水电导率法试验结果的分散性较小,试验简便且易于控制。因此,建议试验时可采用覆冰水电导率法模拟污秽。How to simulate the effect of pollution on icing flashover voltage is the foundation of anti-icing designing method. Based on the test results carried on the multi-functional artificial climate chamber, we discussed the effect of two kinds of polluting methods, i. e. , solid layer pollution method and ice water conductivity method, on DC flashover performance of porcelain and glass insulators, and analyzed the relationship between the two pollution methods. The test results show that while considering the effects on icing flashover voltage, two different pollution methods have a corresponding relationship; the pollution method has an effect on the flashover path which occurs at the inner surface of ice layer for the solid laYer pollution method and on the outer surface of the ice layer for the icing water conductivity method, and the test result by ice water conductivity method is simple and easily controlled due to smaller dispersion. Therefore, ice water conductivity method should be suggested to be used to simulate pollution.

关 键 词：瓷绝缘子 玻璃绝缘子 覆冰 闪络电压 染污方式 直流 冰闪路径 

分 类 号：TM216[一般工业技术—材料科学与工程]