静止和流动油体状态下沿面放电对油纸绝缘性能劣化的对比实验研究  

Comparative experiment study on deterioration of oil-paper insulation performance by surface discharge under static and flowing oil conditions

作　　者：严家明 周一恒 廖瑞金[3] 张建文[1] 董海波[1] YAN Jiaming;ZHOU Yiheng;LIAO Ruijin;ZHANG Jianwen;DONG Haibo(School of Electrical Engineering,China University of Mining and Technology,Xuzhou 221116,China;School of Information and Control Engineering,China University of Mining and Technology,Xuzhou 221116,China;State Key Laboratory of Power Transmission Equipment&System Security and New Technology,Chongqing University,Chongqing 400044,China)

机构地区：[1]中国矿业大学电气工程学院,江苏徐州221116 [2]中国矿业大学信息与控制工程学院,江苏徐州221116 [3]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《绝缘材料》2023年第7期52-59,共8页Insulating Materials

基　　金：国家重点研发计划项目(2017YFF0210600)。

摘　　要：本文在静止和流动油体状态下,对油纸在沿面放电劣化过程中的理化性能及电气性能进行了对比实验研究。利用红外光谱仪、微水测量仪分析油纸的放电产物及水分;利用黏度测试仪、X射线衍射仪、扫描电镜分析油纸的多层次微观结构;利用电气测量手段分析油纸的电导率、电气强度及局部放电等电气性能;对比分析油纸在静止与流动油体中的多类型放电劣化特征。结果表明:油体的流动减缓了油纸的沿面放电劣化,减缓了油纸电导率的上升幅度和电气强度的下降幅度,抑制了沿面放电的发生和发展;表面电导率决定了沿面放电发生的难易程度,其增长导致沿面放电次数统计分布逐渐呈现“波浪”的重复性特征;放电频次决定了油纸沿面放电劣化和破坏的程度,是评估油纸沿面放电劣化状态的高效特征量。In this paper,the physicochemical and electrical properties of oil-paper insulation in the process of surface discharge deterioration under static and flowing oil conditions were studied.The discharge product and moisture of oil-paper insulation were analyzed by infrared spectrometer and micro-water measuring instrument.The multilayer microstructure of oil-paper insulation was analyzed by viscosity tester,X-ray diffractometer,and scanning electron microscope.The conductivity,electric strength,and partial discharge of oil-paper insulation were analyzed by electrical measurement.The multi-type discharge deterioration characteristics of oil-paper insulation in static and flowing oil were compared and analyzed.The results show that the flow of oil slows down the surface discharge deterioration of oil-paper insulation,retards the rise of electrical conductivity and the decline of electric strength,and inhibits the occurrence and development of surface discharge.The surface conductivity determines the difficulty of surface discharge,and its increase results in the statistical distribution of surface discharge times showing a repetitive characteristic of"wave"gradually.Discharge frequency determines the surface discharge deterioration and destruction degree of oil-paper insulation,which is an efficient characteristic quantity to evaluate the deterioration state of oil-paper surface discharge.

关 键 词：油纸绝缘 沿面放电 油体状态 理化性能 电气性能 

分 类 号：TM214[一般工业技术—材料科学与工程]