高电压技术2017，Vol.43Issue(3)：915-922,8.DOI:10.13336/j.1003-6520.hve.20170303031
交/直流电压下气体绝缘变电站盆式绝缘子表面电荷对闪络电压的影响
Influence of Surface Charge on Flashover Voltage of Gas Insulated Substation Basin Insulator Under AC and DC Voltage
摘要
Abstract
The accumulated surface charge of the insulators in gas insulated substation (GIS) can not only distort the electric field but also decrease the surface flashover voltage.We established a set of high-precision surface charge measurement system utilizing the static capacitive probe method and a matched three-dimensional manipulation devices based on actual 252 kV GIS basin insulator.Referring to the insulating design and flashover properties of GIS basin insulator,an effective surface flashover experimental model was set up.The experimental results indicate that no matter under AC or DC voltage,the more the accumulated surface charge is,and the more the decrease of surface flashover voltage will be.Compared to the surface flashover voltage of insulator under 50 kV AC voltage for 1 hour,the voltage under the condition of 53 kV AC voltage for 3 hours can decrease by 10.2％,while it reaches 23.0％ under DC voltage,which indicates the accumulated surface charge has a significant influence on the flashover and must be considered seriously for the insulation design.The research achievement in this paper can provide meaningful reference to the insulating design of insulators in GIS and gas insulated line (GIL).关键词
气体绝缘变电站/盆式绝缘子/静电探头/表面电荷/积聚特性/绝缘设计裕度/闪络电压Key words
gas insulated substation/basin insulator/static capacitive probe/surface charge/accumulation characteristic/insulating design margin/flashover voltage引用本文复制引用
齐波,高春嘉,赵林杰,李成榕,屠幼萍..交/直流电压下气体绝缘变电站盆式绝缘子表面电荷对闪络电压的影响[J].高电压技术,2017,43(3):915-922,8.基金项目
国家重点基础研究发展计划(973计划)(2014CB239502).Project supported by National Basic Research Program of China(973 Program) (2014CB239502). （973计划）
