密闭环境下高压电缆终端硅油劣化特性  

Deterioration characteristics of silicone oil for high voltage cable terminal in closed environment

作　　者：张静 蔡玉汝[1,2] 张小军 陈佳 程立丰 张伟超[4] ZHANG Jing;CAI Yuru;ZHANG Xiaojun;CHEN Jia;CHENG Lifeng;ZHANG Weichao(NARI Group(State Grid Electric Power Research Institute)Co.,Ltd.,Nanjing 211006,China;Wuhan NARI Limited Liability Company of State Grid Electric Power Research Institute,Wuhan 430074,China;State Grid Xinjiang Electric Power Company Limited Electric Power Research Institute,Urumqi 830011,China;School of Electrical and Electronic Engineering,Harbin University of Science and Technology,Harbin 150080,China)

机构地区：[1]南瑞集团(国网电力科学研究院)有限公司,江苏南京211006 [2]国网电力科学研究院武汉南瑞有限责任公司,湖北武汉430074 [3]国网新疆电力有限公司电力科学研究院,新疆乌鲁木齐830011 [4]哈尔滨理工大学电气与电子工程学院,黑龙江哈尔滨150080

出　　处：《绝缘材料》2023年第6期40-45,共6页Insulating Materials

基　　金：国家电网有限公司科技项目(5500-202326176A-1-1-ZN)。

摘　　要：为研究密闭环境下高压电缆终端硅油中水分析出原因及其劣化后的性能参数,以填充于电缆终端内部的TR50绝缘硅油为研究对象,搭建了密闭环境的电、热老化试验平台,测试了不同老化状态下硅油的理化性能与电气性能。结果表明:电老化与热老化均能引起硅油的水分析出,90℃热老化与低能局部放电对硅油理化及电气性能的劣化影响较小,间歇火花放电及持续电弧放电对硅油理化及电气性能的劣化影响较大,其中击穿电压、介质损耗因数、体积电阻率和含水量的相关性较大,这些指标可有效表征硅油的劣化程度。In order to study the causes of dehydration of silicone oil for high voltage cable terminal in closed environment,and investigate its characterization parameters after deterioration,we built an experimental platform with closed environment for thermal ageing and electrical ageing,and tested the physical,chemical,and electrical properties of silicone oil under different ageing states.The results show that both thermal ageing and electrical ageing can cause the dehydration of silicone oil.The thermal ageing at 90℃and low energy partial discharge have less effect on the deterioration of the physical,chemical,and electrical properties of silicone oil,while the intermittent spark discharge and continuous arc discharge have great effect on that.The breakdown voltage,dielectric loss factor,and volume resistivity have larger correlation with the water content,so that they can effectively represent the deterioration degree of silicon oil.

关 键 词：硅油 电缆终端 密闭环境 水分 热老化 电老化 

分 类 号：TM214[一般工业技术—材料科学与工程]