冷雾环境下绝缘子污层饱和湿润特性分析  

Analysis on Saturated Wetting Characteristic of Pollution Layer on Insulator in Cold Fog Environment

作　　者：宋毅 

机构地区：[1]江苏省送变电公司,南京211102

出　　处：《高压电器》2014年第11期122-127,共6页High Voltage Apparatus

摘　　要：电力系统污闪事故多发生在秋冬清晨,其特点是环境温度低并伴有大雾天气,因此研究冷雾环境下绝缘子污层饱和湿润特性对于防污闪工作的深入研究具有重要的意义。笔者通过人工污秽试验测量了不同盐密、灰密下的绝缘子污层饱和湿润时间以及泄漏电流曲线,分析了盐密、灰密和绝缘子型式对污层饱和湿润时间和泄漏电流的影响,得到了其饱和湿润特性。结果表明:盐密、灰密和绝缘子结构型式对污层的饱和湿润均有一定的影响。不同结构的绝缘子在同一污秽度下,其污层饱和湿润时间差别较大。研究结果可为输电线路外绝缘设计和选择提供参考。The accidents of pollution flashover on power system usually occur in the morning in autumn and winter seasons. The seasons have the features of low ambient temperature and heavy fog weather. Therefore, it is necessary to investigate the saturated wetting characteristic of pollution layer on an insulator in cold fog environment to prevent pollution flashover. We conducted artificial pollution test to obtain the pollution layer＇s saturated wetting time and the leakage current curve under different SDD and NSDD of the pollution layer. We also analyzed the influences of SDD, NSDD, and insulator type on the saturated wetting time and the leakage current to obtain the saturated weting characteristic. The results show that all SDD, NSDD, and insulator structure impose effects on the saturated wetting time of the pollution layer. This study may offer a reference for design and selection of transmission line＇ s external insulation.

关 键 词：绝缘子 冷雾 湿润特性 盐密 灰密 

分 类 号：TM216[一般工业技术—材料科学与工程]