XLPE电缆绝缘加速热老化特性  

Accelerated Thermal Ageing Characteristics of XLPE Cable Insulation

作　　者：胡丽斌 陈杰 李陈莹 张志坚 张明泽[3] 曹京荥 谭笑 刘骥[3] HU Libin;CHEN Jie;LI Chenying;ZHANG Zhijian;ZHANG Mingze;CAO Jingying;TAN Xiao;LIU Ji(State Grid Jiangsu Electric Power Company Research Institute,Nanjing 210008,China;Wuxi Power Supply Company of State Grid Jiangsu Electric Power Company,Wuxi 214062,China;Harbin University of Science and Technology,Harbin 150080,China)

机构地区：[1]国网江苏省电力有限公司电力科学研究院,江苏南京210008 [2]国网江苏省电力有限公司无锡供电分公司,江苏无锡214062 [3]哈尔滨理工大学,黑龙江哈尔滨150080

出　　处：《绝缘材料》2020年第2期59-63,共5页Insulating Materials

基　　金：国家电网有限公司科技项目(5210EF190014)

摘　　要：为探究长期运行环境下XLPE电缆绝缘的老化特性,在实验室条件下对电缆绝缘材料进行加速热老化实验,通过红外光谱、氧化诱导时间及频域介电响应测试,比较分析老化前后XLPE电缆绝缘的理化特性、电气特性变化规律。结果表明:红外光谱中的羰基峰值可用于定性分析XLPE绝缘材料的老化程度;XLPE绝缘高温下的降解随着老化时间的延长愈加严重,氧化诱导时间不断缩短;XPLE材料介质损耗因数频谱曲线的最小值tanδmin与材料老化程度相关且与测试温度无关,因此tanδmin可作为评估XLPE绝缘老化情况的特征量。In order to study the thermal ageing characteristics of XLPE cable insulation in long-term operation environment,accelerated thermal ageing experiments were conducted on cable insulation materials in laboratory,and the physical,chemical,and electrical properties of XLPE cable insulation before and after ageing were analyzed by infrared spectrum test,oxidation induction time test,and frequency domain dielectric response test.The results show that the peak value of carbonyl group in infrared spectrum can be used to analyze the ageing degree of XLPE insulation qualitatively.With the increase of ageing time,the degradation of XLPE insulation at high temperature becomes more and more serious,and the oxidation induction time decreases continuously.The minimum value(tanδmin)of dielectric loss factor spectrum curve is related to the ageing degree of XLPE materials and unrelated to the test temperature,therefore the tanδmincan be used as a characteristic parameter to evaluate the ageing state of XLPE insulation.

关 键 词：XLPE 加速老化 介质损耗因数 扫频测试 

分 类 号：TM215[一般工业技术—材料科学与工程]