架空线路外绝缘污闪及其防护  

The Pollution Flashover of External Overhead Line Insulation and Anti-contamination Measures

作　　者：李德超[1] 张玉环[1] 李景禄[1] 万欣[2] 

机构地区：[1]长沙理工大学电气与信息工程学院,长沙410076 [2]重庆市长寿供电局,重庆401220

出　　处：《绝缘材料》2009年第1期50-54,共5页Insulating Materials

摘　　要：采用表面电弧与剩余污层电阻相串联的污闪物理模型对污闪机理进行了分析,并在分析其影响因素的基础上对如何防止污闪事故的发生进行了探讨。结果表明,污闪闪络主要由绝缘子表面积污和使积聚的污秽物质受潮两个因素引起。增大爬电比距是防止污闪发生的一个重要措施;使用防污涂料和复合型绝缘子是另一种防污闪的有效措施。The pollution flashover mechanism was analyzed by utilization of a physical model with connection in series of surface electric arc and residual pollution layer resistances;and the measures for anti-pollution flashover were proposed.The analysis results indicate that pollution flashover are mainly caused by pollution accumulated on insulator surface and moistened contamination materials.To have sufficient creepage distance,the use of anti-pollution flashover coating and compound insulator are two effective ...

关 键 词：污闪机理 影响因素 防污闪 

分 类 号：TM726.3[电气工程—电力系统及自动化]