高电压技术2018，Vol.44Issue(5)：1723-1728,6.DOI:10.13336/j.1003-6520.hve.20180430043
空气中不同温度下环氧树脂绝缘子表面电荷消散过程的实验研究
Experimental Study on the Decay Process of Surface Charges on Epoxy Insulators Under Different Temperature in Air
摘要
Abstract
The surface of insulators is prone to generate charges under a DC high-voltage, which impacts the insulation performance of insulators. The rate of surface charges decay is related to surface and volume resistivity of the insulator. Temperature impacts surface and volume resistivity of the insulator. To study the decay process of surface charges on epoxy resin insulators, we designed a set of surface charge measurement device, which could measure the surface charge distribution on insulators under different temperature. The results reveal that the decay process of epoxy resin insulators is similar to exponential decay process and is mainly related to the surface resistivity of insulators; The larger the surface resistivity is, the smaller the rate of surface charges decay will be; Temperature in working bushing is higher than room temperature. In the selection of epoxy materials, the changes in resistivity within the operating temperature range should be considered; Under the premise of ensuring the dielectric strength, epoxy resin materials with smaller surface resistivity should be chosen to reduce the surface charge accumulation on the insulator. The results of this study are of great significance to the design of epoxy resin insulating support in the super-large DC wall bushing.关键词
表面电荷/环氧树脂/表面电阻率/体积电阻率/温度/电荷消散Key words
surface charges/epoxy/surface resistivity/volume resistivity/temperature/charge decay引用本文复制引用
陈可,梁曦东,刘杉..空气中不同温度下环氧树脂绝缘子表面电荷消散过程的实验研究[J].高电压技术,2018,44(5):1723-1728,6.基金项目
国家高技术研究发展计划(863 计划) (2014AA051800 （863 计划）
2014AA051801).Project supported by National High-tech Research and Development Program of China (863 Program) (2014AA051800, 2014AA051801). （863 Program）
