高电压技术2011，Vol.37Issue(3)：585-593,9.
电场对复合绝缘子积污特性影响的探究
Effect of the Electric Field on the Contamination Accumulation Characteristic of the Insulators
摘要
Abstract
Contamination accumulation characteristic of the insulators depends on the kinetic characteristic of the par ticles moving around the insulators to a great degree. We researched the effect of different factors on the dust parti cles ' motion by means of experiments and numerical calculation. The effect of electric field was researched by coaxi al electrode model experiments. A simplified 2D axial symmetric calculation model was built to simulate the dust particles' trajectories under the composite effect of the polarization force, the electric field force, the steady-state drag force and the gravitational force. The simulation resulted in good coincidence with the experimental phenome non. In the end, the distribution of the electric field and the electric potential around an actual EHVDC insulator was calculated. The results are as bellow; The polarization force is very weak and can not influence the dust parti cles' motion but make the particles' adhesion to the insulator's surface firmer. The charged dust particles deflect a-long the electric field line driven by the electric field force, and the direction of the electric field between the insula tor's sheds is almost perpendicular to the sheds' surface, so the electric field force can promote the precipitation of the dust particles on the dc insulators. When wind is strong, the steady-state drag force dominates and the particles move with the wind. The contamination accumulation characteristic of different insulators under different operating conditions can be better explained on the basis of the effect of the electric field on the dust particles' motion.关键词
复合绝缘子/尘粒/运动特性/积污特性/电场力/电晕Key words
composite insulator/ dust particles/ kinetic characteristic/ contamination accumulation/ electric field force/ corona分类
信息技术与安全科学引用本文复制引用
王晶,陈林华,刘宇,梁曦东..电场对复合绝缘子积污特性影响的探究[J].高电压技术,2011,37(3):585-593,9.基金项目
国家重点基础研究发展计划(973计划)(2011CB209406) （973计划）
国家重点实验室自主课题. （）
