乙丙橡胶绝缘中气隙引起的局部放电研究  

Research of Partial Discharge Resulting from Cavities Within the Insulation of Ethylene Propylene Diene Monomer

作　　者：门汝佳 

机构地区：[1]山西省化工设计院,太原030024

出　　处：《太原理工大学学报》2018年第1期147-151,共5页Journal of Taiyuan University of Technology

基　　金：山西省自然科学基金资助项目(201601D021092)

摘　　要：为了研究三元乙丙橡胶(ethylene propylene diene monomer,EPDM)电缆绝缘中由于气隙引起的局部放电及其变化规律,分别制作了含有被绝缘包围气隙和与电极相连气隙缺陷的乙丙橡胶试样,搭建了局部放电测量系统,试验测量并分析了不同频率正弦电压作用下两种气隙的局部放电起始放电电场强度,重点分析了工频电压下,气隙放电的起始放电量及局部放电分布图。试验结果表明:气隙引起的局部放电起始放电电场强度与外施电压频率和气隙直径有关。工频下,不同气隙类型的局部放电分布图随外施电压幅值呈不同的形状,两种气隙类型下的局部放电分布谱图均呈现兔耳型分布,且正负半轴相对局部放电发生相位对称分布。与电极相连气隙受气隙位置影响,正负半周局部放电幅值大小不同。本文研究内容为诊断矿用EPDM电缆绝缘中气隙放电类型及分析局部放电过程提供了依据。In order to explore the partial discharge characteristic of cavities in insulation of mining ethylene propylene diene monomer（EPDM）cables,EPDM samples with two types of defects,namely dielectrically bounded cavities and electrode bounded cavities,were made.Then,on a partial discharge measurement system,the partial discharge experiments were conducted at sinusoidal voltage with different frequency.The partial discharge inception electric field,inception partial discharge amplitude and partial discharge distribution were measured.The results indicate that the inception electric field of partial discharge from cavities depended on the frequency of applied voltage and cavity＇s diameter.The partial discharge distribution of two types of cavity was different at different voltage amplitude.The results provides a basis for diagnosing the cavity＇s type and the development of partial discharge in mining EPDM cables.

关 键 词：局部放电 起始放电电场强度 三元乙丙橡胶电缆 

分 类 号：TM247[一般工业技术—材料科学与工程]