直流GIL中附着导电微粒对绝缘子表面电荷积聚特性的影响分析  

Influence of the DC-GIL Conductive Adherent Particles on the Charge Accumulation of Insulator Surface

作　　者：李伯涛 王健[2] 张圣富 李庆民[2] 周勇 李士动[3] 

机构地区：[1]国网山东电力公司日照供电公司,山东日照276826 [2]华北电力大学新能源电力系统国家重点实验室,北京102206 [3]国网泰安供电公司,山东泰安271000 [4]国网恩施供电公司,湖北恩施445000

出　　处：《高压电器》2017年第7期80-86,共7页High Voltage Apparatus

基　　金：国家重点基础研究发展计划项目(973计划)(2014CB239502)~~

摘　　要：导电微粒污染是直流GIL绝缘强度劣化的重要影响因素,为研究其对柱式绝缘子表面电荷积聚的影响,文中搭建了考虑导电微粒情况的电荷测量平台。首先探究了绝缘子表面电荷积聚的时间效应,并在此基础上进一步研究了微粒附着位置、微粒长度、微粒直径对表面电荷积聚的影响。结果表明:附着绝缘子表面的导电微粒可引起表面电荷的积聚激增,其中与电极接触的微粒引起的电荷激增量更为显著;随微粒长度增加,微粒引起电荷积聚增强,而微粒直径对电荷积聚的影响并没有明显的线性规律;与正电荷相比,负电荷更易发生积聚。The conductive particle pollution is an important factor on insulation strength deterioration of DC-GIL. This paper studies the effects of conductive particles on surface charge accumulation of a post insulator. In the article, a particle charge measurement platform considering conductive particles is established. First, explore the charge accumulation time of insulator surface in steady state. In addition, based on the charge accumulation time, the effects of the location, length and diameter of conductive particles on charge accumulation are analyzed. The results illustrate that the accumulation of surface charge surge can be caused by the conductive particles attached to the surface of the insulator. In addition, the surge caused by the particles contact with electrodes is more remarkable. As the particle length increases, the charge accumulation caused by the particles increases. However, Influence of particle diameter on the electric charge accumulation is not linear. Compared with positive charges, negative charges are more likely to accumulate.

关 键 词：直流GIL 电荷积聚 附着微粒 电荷测量平台 

分 类 号：TM216[一般工业技术—材料科学与工程]