复合绝缘横担聚氨酯/芯棒界面水扩散试验研究  

Experimental Study on Water Diffusion at Interface Between Polyurethane and Mandril of Composite Insulation Crossarm

作　　者：唐力 解卓鹏 刘磊 张重远[2] 李乐[2] 刘贺晨[2] TANG Li;XIE Zhuopeng;LIU Lei;ZHANG Zhongyuan;LI Le;LIU Hechen(Electric Power Research Institute China Southern Power Grid,Guangzhou 510663,China;Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense,North China Electric Power University,Baoding 071003,China)

机构地区：[1]南方电网科学研究院有限责任公司,广东广州510663 [2]华北电力大学河北省输变电设备安全防御重点实验室,河北保定071003

出　　处：《绝缘材料》2021年第6期63-68,共6页Insulating Materials

基　　金：南方电网科学研究院科技项目(ZBKJXM20170053)。

摘　　要：复合绝缘横担具有轻质高强的特点,可起到缩减线路走廊面积,加强电网绝缘能力等重要作用,其内绝缘界面电气绝缘性能关系着电力系统的安全稳定运行。本研究在IEC 62217:2012基础上,对内填充型复合横担的界面试样进行144 h的水扩散试验,测量不同阶段的泄漏电流和击穿情况,结合试验结果分析绝缘横担试样在水扩散试验条件下的界面老化特性。结果表明:当水扩散时间为144 h时,试样的泄漏电流高达20 mA,是未经水扩散试验试样的1 000倍,其界面击穿时间比未进行水扩散试验的试样加快了65%,水分子高温扩散作用下对界面具有破坏效应,且水扩散时间越长,对聚氨酯/芯棒界面的破坏程度越大。The composite insulation cross arm has the characteristics of light weight and high strength,which can play an important role in reducing the area of the line corridor and strengthening the insulation capacity of the power grid.The electrical insulation performance of the internal insulation interface is related to the safe and stable operation of the power system.In this study,based on IEC 62217:2012,a 144-hour water diffusion test was carried out on the interface specimens of the inner-filled composite crossarm,and the leakage current and breakdown at different stages were measured.Combined with the test results,the insulation crossarm samples were analyzed.Interface ageing characteristics under water diffusion test conditions.The results show that when the water diffusion time is 144 h,the leakage current of the sample is as high as 20 mA,which is 1000 times that of the sample without the water diffusion test,and the interface breakdown time is faster than that of the sample without the water diffusion test.65%,water molecules have a destructive effect on the interface under the action of high temperature diffusion,and the longer the water diffusion time,the greater the damage to the polyurethane/glass fiber reinforced plastic interface.

关 键 词：内填充型复合绝缘横担 水扩散试验 击穿电压 泄漏电流 

分 类 号：TM215[一般工业技术—材料科学与工程]