自然降雨对绝缘子自然污秽冲洗效果的影响研究  

Research on the Cleaning Effect of Natural Rainfall on the Naturally Contaminated Insulators

作　　者：高嵩 刘洋 曹彬[2] 陈杰 高思明 王黎明[2] GAO Song;LIU Yang;CAO Bin;CHEN Jie;GAO Siming;WANG Liming(Electric Power Research Institute,State Grid Jiangsu Electrical Power Company,Nanjing 211103,China;Graduate School at Shenzhen,Tsinghua University,Shenzhen 518055,China)

机构地区：[1]国网江苏省电力公司电力科学研究院,南京211103 [2]清华大学深圳研究生院,广东深圳518055

出　　处：《电瓷避雷器》2020年第6期159-163,170,共6页Insulators and Surge Arresters

基　　金：国家重点研发计划(编号:2017YFB0902702);国家电网公司总部科技项目资助。

摘　　要：为了研究绝缘子表面污秽积聚规律,了解输变电设备外绝缘裕度,电力系统一般将绝缘子积污过程分为绝缘子污秽粘附过程及雨水清洗过程两个相对独立的过程进行研究。将已经积污的不同类型的4种绝缘子放置于自然降雨中进行自然清洗,对比不同类型绝缘子在直接被雨水冲洗后污秽变化的情况。研究了降雨对不同材质、不同伞型表面污秽流失率的影响,对比了降雨前后污秽粒径、污秽中可溶盐成分的变化。研究发现,自然降雨对不同伞型绝缘子表面污秽的冲洗效果并不一致,并且粒径小于25μm和大于300μm的污秽更容易被自然降雨冲洗。研究结果可为绝缘子自然污秽的预测提供参考。In order to study the accumulation of insulator surface contamination and to know the external insulation margin of transmission and transformation equipment,the pollution accumulation process is generally divided into two relatively independent processes: the process of contamination adhesion on the insulator and the process of contamination washing out by rainfall. Four different types of naturally contaminated insulators were placed in natural rain to study the cleaning effect of natural rainfall. The contamination changes of different types of insulators before and after washing by the natural rain were compared and the effects of rainfall on the loss rate of different materials and umbrella types were analyzed.The changes of particle size and soluble salt composition of the natural contamination before and after rainfall were compared. It is found that the cleaning effect of natural rainfall on the surface contamination of insulators with different sheds is different,and the contamination with particle size less than 25 μm and larger than 300 μm is more easily washed by natural rainfall. The research results can provide some references for the prediction of pollution degree of naturally contaminated insulators.

关 键 词：绝缘子 污秽特性 自然降雨 污秽流失特性 

分 类 号：TM216[一般工业技术—材料科学与工程]