直流线路绝缘子冰闪特性研究  

Icing flashover characteristics of insulators of DC transmission lines

作　　者：程登峰[1] 陈自年[1] 郭守贤[1] 

机构地区：[1]安徽省电力科学研究院,合肥230061

出　　处：《华东电力》2009年第9期1471-1474,共4页East China Electric Power

摘　　要：叙述了在人工气候室内对不同形式绝缘子进行的覆冰直流闪络特性研究,根据试验结果分析了不同直流绝缘子的闪络特性,并研究分析了人工污秽与自然污秽对冰闪电压的影响。结果表明,不同材质和型式的绝缘子对覆冰直流闪络电压影响不大,随着冰厚增加以及污秽增加,覆冰直流闪络电压都会下将,提出了绝缘子串直流U50%闪络电压与覆冰厚度及污秽的关系表达式,指出自然污秽下绝缘子的冰闪电压高于相同污秽状况下的人工污秽绝缘子。The icing flashover characteristics of various types of insulators for DC transmission lines were studied through tests in the artificial climate chamber, and the influence of artificial pollutants and natural pollutants on the flashover voltage was analyzed. The results showed that the material and structure of the insulator do not exert great influence on its icing flashover voltage, and the flashover voltage tends to decrease with the increase of ice thickness and pollutants. The relation expression of the flashover voltage U50% of the insulators and the ice thickness and pollutants was proposed, and it was pointed out that the icing flashover voltage of insulators under natural pollutants is higher than that of the insulators under artificial pollutants of the same pollution grade.

关 键 词：绝缘子 覆冰 直流 闪络 

分 类 号：TM216[一般工业技术—材料科学与工程]