污秽与憎水性对复合绝缘子泄漏电流特性的影响  

Impacts of Contamination and Hydrophobicity Level on the Leakage Currents of Composite Insulators

作　　者：蒋兴良[1] 赵世华[1] 张志劲[1] 胡建林[1] 胡琴[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400030

出　　处：《高电压技术》2013年第11期2573-2580,共8页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2009CB724503)~~

摘　　要：分析泄漏电流与污秽及憎水性之间的关系是实现污闪预警的有效手段。为此基于人工气候室试验,模拟了运行电压下污秽与憎水性对复合绝缘子泄漏电流的影响,揭示了泄漏电流与污秽、憎水性之间的内在联系。结果表明:随着污秽程度的增大,泄漏电流的有效值最大值增大,高幅值脉冲数增多,电压电流相位差从-33.19°变化到接近0,基波含量从98.03%降低到79.89%,其他各次谐波含量整体呈增加趋势。而随着憎水性水平的降低,泄漏电流的有效值最大值增大,高幅值脉冲数增多,电压泄漏电流相位差减小,基波含量从97.56%降低到85.97%,其他各次谐波含量整体呈增加趋势。For composite insulators, analyzing the relationships between leakage current and contamination/ hydrophobicity level could be considered as an effective measure for forecasting pollution flashovers. Therefore, using experimental data in artificial climate laboratory, we simulated the impacts of contamination and hydrophohicity level on leakage current to reveal the relationships between them. The results show that, with the increase of contamination, the maximum effective value of leakage current and the number of high-amplitude pulses increase, the difference between phases of leakage current and applied voltage decreases from -33.19° to 0, and the fundamental harmonic content of leakage current decreases from 98. 03% to 79. 89% while the other harmonic contents increase. With the decrease of hydrophobicity, the maximum effective value of leakage current and the number of high-amplitude pulses increase, the difference between phases of leakage current and applied voltage decreases, and the fundamental harmonic content of leakage current decreases from 97.56% to 85.97% while the other harmonic contents increase.

关 键 词：泄漏电流 污秽 憎水性 时频特征 复合绝缘子 输电线路 

分 类 号：TM216[一般工业技术—材料科学与工程]