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Research on the long-time operation performance of composite insulator shed hydrophobicity under hydrothermal conditions

查看全文 作　　者：Li [1]Cheng;Shanfeng [1]Shao;Sida [1]Zhang;Ruijin [1]Liao;Lijun [1]Yang;Chenjun [2]Guo 高影响力作者 机构地区：[1]State Key Laboratory of Power Transmission Equipment&System Security and New Technology,Chongqing University,Shapingba District,Chongqing,People's Republic of China;[2]Yunnan Electric Power Research Institute,Kunming,Yunnan,People's Republic of China高影响力机构 出　　处：《High Voltage》索引2018年第3卷第1期,共6页高影响力期刊 基　　金：supported by the Chongqing Research Program of Basic Research and Frontier Technology(no.cstc2017jcyjAX0466);the Fundamental Research Funds for the Central Universities(106112017CDJXY150098). 摘　　要：Due to excellent anti-pollution flashover performance,a composite insulator has become the most frequently and widely used insulator product in transmission lines.Sheath hydrophobicity is the core factor that determines the anti-pollution flashover performance of the composite insulator.To study the change rule of insulator sheath hydrophobicity under the long-term operation condition,more than 390 samples produced by the same manufacturer that had operated for 3–22 years were extracted from the adjacent lines to eliminate the impact of the running environment and manufacturer formula.To study the reasons for hydrophobic fluctuations,surface energy tests and Fourier transform infrared spectroscopy tests were conducted on the superficial layer materials based on a two-droplet method.The change rule of the material physical and chemical properties with operation time was obtained.Next,the relationship between the surface microstructure of the material and operation time was determined by laser scanning confocal microscopy and scanning electron microscopy.Finally,based on the analysis results of surface energy and surface topography,the physical model of shed material hydrophobic variation in the operation process was obtained. 关 键 词：COMPOSITE PERFORMANCE HYDROTHERMAL
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