基于直流电导率评估老化油纸绝缘水分变化的研究  

Research on Moisture Change of Aging Oil Paper Insulation Based on Direct Current Conductivity Evaluation

作　　者：周远化 周远科 李红艳[3] 刘毅[1] ZHOU Yuan-hua;ZHOU Yuan-ke;LI Hong-yan;LIU Yi(College of Electrical Engineering and New Energy, Three Gorges University, Yichang 443002, China;State Grid Anhui Electric Power Company, Hefei 230022, China;State Grid Bengbu Power Electric Supply Company, Bengbu 233000, China)

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002 [2]国网安徽省电力公司,安徽合肥230022 [3]国网蚌埠供电公司,安徽蚌埠233000

出　　处：《电工电气》2017年第8期51-54,共4页Electrotechnics Electric

基　　金：国家自然科学基金项目(51307097)

摘　　要：变压器在老化运行中产生的水分会大大降低变压器的绝缘性能。在实验室条件下研究了变压器老化过程中的水分变化情况,对油纸样品实行快速老化,获得了4组不同老化程度的样品,测试样品的极化/去极化电流(PDC),通过计算不同样品的电导率评估出了样本中的水分含量。研究结果表明:随着老化程度的加深,油纸系统的吸收比、极化指数逐渐减小,直流电导率逐渐升高,水分含量逐渐增大。The water which produced during the transformer aging operation will greatly reduce the insulation performance of transformer.This paper studied the moisture change of transformer aging process in laboratory.The oil paper samples were rapidly carried out aging to obtain groups of samples with different aging degree and to measure the polarization and depolarization current.The moisture content of samples was calculated by calculating the conductivity of different samples.The results show that with the deepening of aging,the absorption ratio and polarization index of oil paper system decreased gradually,the direct current conductivity increased,as well as the moisture content.

关 键 词：直流电导率 极化/去极化电流 老化 油纸系统 水分 

分 类 号：TM41[电气工程—电器]