交联聚乙烯电缆中水树枝诊断的研究现状  

Development Status of Water Tree Diagnosis in XLPE Cable Insulation

作　　者：孙辉[1] 喻岩珑[1] 王伟[1] 高超飞 

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206 [2]日照供电公司,山东日照276826

出　　处：《电网与清洁能源》2011年第6期40-42,共3页Power System and Clean Energy

摘　　要：交联聚乙烯(XLPE)电缆因其具有优良的导电性、较好的耐热性和机械强度,自问世以来已广泛应用于输电线路和配电网中。然而,当电缆绝缘处于潮湿的环境中时,在电场的作用下会产生水树枝老化。随着水树枝的生长,电缆的绝缘性能下降并可能导致绝缘击穿,从而影响电网的安全运行。总结了交联聚乙烯电缆中水树枝老化的研究现状,概述了水树枝的产生机理及近年来水树枝老化的诊断方法,最后对各种诊断方法进行了简单比较。The cross-linked polyethylene （XLPE） cable has been widely used in transmission lines and distribution networks since its coming into being because of its excellent electrical conductivity, better heat resistance and mechanical strength. However, when the cable insulation is operated in the humid environment, it will produce water tree aging under the electric field. With the growth of the water tree, the performance of the cable＇s insulation decreases and it may even lead to an insulation breakdown. This paper summarizes the latest development of the researches into the water tree aging in the cross-linked polyethylene cable. It presents the mechanism of the water tree and introduces the diagnosis methods in recent years with the due comparisons between those diagnostic methods.

关 键 词：XLPE电缆 绝缘老化 水树枝 空间电荷 

分 类 号：TM855[电气工程—高电压与绝缘技术]