绝缘操作杆表面状态与沿面放电关系试验研究  

Relationship test of surface state and discharge voltage along the surface of insulated hot stick

作　　者：吴田 陈聪[1] 刘磊 黎鹏 杨东 WU Tian;CHEN Cong;LIU Lei;LI Peng;YANG Dong(College of Electric Engineering&New Energy,China Three Gorges University,Yichang 443002,China;China Southern Power Grid Research Institute Co.,Ltd.,Guangzhou 510080,China)

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002 [2]南方电网科学研究院有限责任公司,广东广州510080

出　　处：《电力工程技术》2020年第6期132-137,共6页Electric Power Engineering Technology

基　　金：国家自然科学基金资助项目(51807110)。

摘　　要：绝缘操作杆作为带电作业中的重要操作工具,其是否处于良好的绝缘状态对带电作业人员和设备安全具有重要意义。文中通过不同测量方法检测绝缘操作杆表面存在的典型缺陷,通过电介质谱和沿面放电特性试验对高阻性缺陷检测的有效性进行验证。结果表明:在温度为25℃、相对湿度为68.1%的环境中,绝缘操作杆受潮状态下的表面绝缘电阻值比干燥状态下的表面绝缘电阻值下降了60.1%;干燥状态下绝缘操作杆的介质损耗因数小于0.01。利用石墨模拟不同碳化位置对沿面放电电压的影响,通过沿面放电试验可知,当两电极中存在贯通性缺陷时,沿面放电电压会严重下降。基于绝缘操作杆表面电阻或介质损耗特性的绝缘性能评估方法对现场使用的绝缘操作杆绝缘性能评估具有重要工程应用价值。Insulated operating sticks are important operating tools in live work.Whether they are in good insulation state is of great significance to ensure the safety of live working personnel and equipment.Typical defects of insulated hot stick are detected by different measurement methods,and the effectiveness of the high-resistance defect detection is verified by the dielectric spectrum and creeping discharge characteristic tests.The results show that in the environment of temperature 25℃and relative humidity 68.1%,the surface insulation resistance value of the insulated hot stick in the wet state is 60.1%lower than that in the dry state.The dielectric loss factor of the insulated hot stick in the dry state is less than 0.01.Use graphite to simulate the effect of different carbonization positions on creeping discharge voltage.It is obtained through creeping discharge test that when there is a penetrating defect in the two electrodes,creeping discharge voltage drops severely.Based on the research results,method of evaluating the insulation performance of an operating stick based on its surface resistance or dielectric loss characteristics has important engineering application value.

关 键 词：带电作业 绝缘操作杆 表面绝缘电阻 介质损耗 沿面放电 

分 类 号：TM85[电气工程—高电压与绝缘技术]