水带对憎水性表面交流闪络特性与电场分布的影响  

Influence of Water Band on AC Flashover Characteristics and Electric Field Distribution of Hydrophobic Surface

作　　者：刘士利 李卫东[1] 李振新 潘璐瑶 Liu Shili;Li Weidong;Li Zhenxin;Pan Luyao(Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology Ministry of Education Northeast Electric Power University,Jilin 132012 China;Jilin Power Supply Company State Grid Jilinsheng Electric power Supply Company,Jilin 132012 China)

机构地区：[1]现代电力系统仿真控制与绿色电能新技术教育部重点实验室(东北电力大学),吉林132012 [2]国网吉林省电力有限公司吉林供电公司,吉林132012

出　　处：《电工技术学报》2022年第21期5570-5577,共8页Transactions of China Electrotechnical Society

摘　　要：复合绝缘子憎水性减弱时,在潮湿环境中其表面容易汇聚水珠形成水带,从而影响绝缘子表面电场分布和沿面闪络特性。该文采用聚四氟乙烯板模拟水带生成环境,试验研究了直线型和折线型水带形态对憎水性表面闪络过程的影响;基于有限元数值计算,分析了水带及周围电场分布,并结合试验结果探讨了水带影响电弧发展路径的机理。研究结果表明,水带张角θ越小,水带电场越小,而水带之间的干带电场强度越大;同时,水带横向间距d越小,干带电场强度也越大。因此,当憎水性表面存在折线型水带时,电弧依θ和d的不同而呈现三种不同的发展路径。When the hydrophobicity of the composite insulator is weakened,the surface of the composite insulator is easy to gather water droplets to form a water band in the wet environment,which affects the surface electric field distribution and surface flashover characteristics of the insulator.In this paper,a PTFE board is used to simulate the formation environment of the water band,and the influence of the shape of the linear and broken water band on the flashover process of the hydrophobic surface is experimentally studied.Based on the finite element numerical calculation,the electric field distribution of the water band and its surroundings is analyzed,and combined with the test results,the mechanism of influence of the water band on the arc development path is discussed.The results show that the smaller the opening angleθof the water band is,the smaller the water band electric field becomes,and the larger the dry band electric field between the water bands will be.At the same time,the smaller the water band spacing d is,the larger the dry band electric field will be.When there is a broken-line water band on the water surface,the arc shows three different development paths according to the difference ofθand d.

关 键 词：复合绝缘子 水带 憎水性 电弧发展 电场 

分 类 号：TM85[电气工程—高电压与绝缘技术]