110kV交联聚乙烯电缆接头主绝缘含杂质的击穿特性分析  

Analysis on Breakdown Attribute of 110kV XLPE Cable Joint Main Insulation with Impurities

作　　者：刘刚[1] 陈志娟[1] 陆国俊[2] 安宁[1] 

机构地区：[1]华南理工大学电力学院,广州510640 [2]广东电网公司广州供电局中心试验研究所,广州510630

出　　处：《高电压技术》2010年第10期2450-2453,共4页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2009CB724507)~~

摘　　要：为了研究电缆接头主绝缘上含有杂质时高压静电场的分布和数值大小,采用有限元法,计算了加载110kV恒定电压于电力电缆上时,其接头的静电场分布与数值。结果表明,电缆接头含有杂质将引起接头部分电场的畸变现象,当超过其击穿场强时绝缘部分将会被击穿。然后在110kV交联聚乙烯电力电缆接头的主绝缘处人工涂抹一定量的半导电漆作为杂质,通过现场试验验证了有限元分析结果的正确性。To compute electric-field intensity around cable joints when the power cable is loaded on 110kV constant voltage source,the finite element method（FEM）was used.In the presence of impurities in the cable joint,the impurities will cause the local electrical field distorted,and the electric-field intensity will sharply increase.The insulation materials are broken down when the local electrical field is distorted for the intensity exceeding the dielectric strength possibly.Cable joint with artificial impurities was tested under 110kV constant voltage level.The test results verify the computing consequences in the FEM.

关 键 词：有限元法 110kV 交联聚乙烯 电缆接头 半导电漆杂质 静电场 电场畸变 

分 类 号：TM247[一般工业技术—材料科学与工程]