低压电网中电线绝缘热老化过程研究  

Research on Thermal Aging Process of Wire Insulation in Low Voltage Power Network

作　　者：武钱炼 吴自然 吴桂初 赵升 WU Qianlian;WU Ziran;WU Guichu;ZHAO Sheng(Technology Institute of Wenzhou University in Yueqing,Wenzhou,China 325035)

机构地区：[1]温州大学乐清工业研究院,浙江温州325035

出　　处：《温州大学学报（自然科学版）》2023年第2期55-62,共8页Journal of Wenzhou University(Natural Science Edition)

基　　金：温州市重大科技创新攻关工业项目(ZG20199017);温州市工业科技项目(ZG2020049)。

摘　　要：主要研究电网建设中广泛应用的聚氯乙烯(PVC)电线绝缘热老化过程.通过冷热循环的交变试验,探究其热老化的特性,并基于Conffin-Manson模型进行老化过程建模,得到PVC电线的失效模型,实现了对其绝缘热老化寿命的预测.通过建模及试验数据分析,得到PVC电线在热应力下的失效试验模型信息.结果表明,冷热循环交变方法对PVC电线的加速绝缘老化失效是有效的,试验数据与理论加速模型匹配度良好.The paper studies the thermal aging process of PVC wire insulation widely used in power grids.A cooling-and-heating cycling experiment is performed to investigate the thermal aging characteristics of PVC wires.Based on modeling the aging process through the Conffin-Manson model,a failure model is obtained and the prediction of the insulation thermal aging endurance is achieved.Besides,test model information on the failure of PVC wires under thermal stress is obtained after modeling and test data analysis.It is proven that the cooling-and-heating cycling method efficiently accelerates the insulation aging process of PVC wires.Meanwhile,the experimental data match well with the theoretical acceleration model.

关 键 词：PVC电线 加速热绝缘老化 冷热循环交变 绝缘寿命预测 

分 类 号：TM247[一般工业技术—材料科学与工程]