用有限元分析交联聚乙烯电缆中水树成长行为的研究  

Research on Behavior of Water Tree Growth in XLPE Insulation Based on Finite Element Analysis

作　　者：金天雄[1,2] 黄兴溢[1] 江平开[1] 马芝森[1] 李哲凡[2] 

机构地区：[1]上海市电气绝缘与热老化重点实验室(上海交通大学),上海200240 [2]朝鲜金策工业综合大学电气工程系,朝鲜平壤

出　　处：《绝缘材料》2008年第2期66-71,共6页Insulating Materials

基　　金：国家自然科学基金项目资助(50677037)

摘　　要：水树是电缆主绝缘的主要劣化现象之一,严重影响电缆的使用寿命。正确评价长有水树的材料的电场分布,对于理解水树的生长机理以及水树引起的介质击穿是非常重要的。采用具有不同物理化学性能的热老化XLPE电缆绝缘和与外加电场梯度方向成一定角度的非常规的水针电极结构进行水树枝加速老化实验,用有限元方法对水树加速老化实验中采用的结构模型进行数值电场分析,研究了水树尖端处电场增强对水树枝老化发展的影响。Water treeing is one of the main deterioration phenomena, which can affect the service lifetime of the XLPE power cable. This study aims to investigate the role of the electric field intensity in the water treeing phenimena under the simultaneous consideration of the physical and chemical properties of XLPE cable insulation. For this purpose, the XLPE insulation specimens with different physical and chemical properties used in the water treeing test were prepared through the accelerated thermal aging of 3 kV-rated XLPE cable samples, and the water needle electrodes declined by some arbitrary angle values to the gradient direction of the external electric field are introduced into both the water treeing and the numerical experiments.

关 键 词：交联聚乙烯电缆 水树枝 电场分布 有限元分析 劣化机理 

分 类 号：TM247.1[一般工业技术—材料科学与工程] TM216[电气工程—电工理论与新技术]