覆有不均匀污层线路悬式绝缘子表面电场分布计算  

Calculation on The Surface Electric Field Distribution of Suspension-type Insulators Covered with Nonuniform Surface Pollution

作　　者：项阳 郭洁[2] 雒铮[3] 

机构地区：[1]南方电网科学研究院,广州510080 [2]西安交通大学电气工程学院,西安710049 [3]广东省电力设计研究院,广州510063

出　　处：《南方电网技术》2011年第5期72-76,共5页Southern Power System Technology

摘　　要：研究污秽潮湿状态下绝缘子表面电场特征对提高绝缘子可靠性有重要的意义。基于污秽潮湿状态绝缘子周围电场的电阻性特点,采用离散电阻模型研究了轴向不均匀的污层对绝缘子电场和电位分布的影响。计算结果表明:绝缘子表面电场强度切向分量与绝缘子表面污秽轴向分布不均匀程度有关;流过污层的泄漏电流的焦耳热效应会加剧绝缘子表面电导率的不均匀程度。It is meaningful for the improvement of insulator reliability to research the surface electric field characteristics in a condition of dirt and moisture.Based on the resistance characterisc of the insulator field in the condition,this paper adopts the discrete resistor model to study the influence of nonuniform pollution layer along the insulator’s axis on the distributions of insulator’s electric field and potential.The results show that the tangential component of the insulator’s surface electric field intensty depends on the nonuniform,and the nonuniform of insulator’s surface conductivity becomes worse by Joule heat effect of the leakage current through pollution layer.

关 键 词：绝缘子 离散电阻模型 表面电导率 污闪 

分 类 号：TM216[一般工业技术—材料科学与工程] TM852[电气工程—电工理论与新技术]