摘要
GIS中盘式绝缘子的电气性能是设计者关注的重点,盘式绝缘子在制造的过程中,由于浇注工艺的原因会在金属法兰处留有一椭圆切面的浇注孔,内部填充环氧树脂,在环氧树脂和金属法兰交界处会产生一定的电场畸变。主要研究金属法兰开孔尺寸大小和结构对盆式绝缘子表面和浇注孔表面电场强度的影响。研究表明:大尺寸浇注孔表面的场强最大值为0.85 k V/mm,要高于小尺寸浇注孔表面电场强度最大值0.38 kV/mm。说明开孔越小,浇注孔表面电场强度最大值越小,在满足测量要求情况下,开孔越小越好。
The electrical properties of the disc-type insulator in GIS is the designer's focus,because the disc-type insulator will leave an elliptic plane pouring hole in the metal flange in the process of manufacturing due to the pouring process,and the hole is filled with epoxy resin and certain electric field distortion will occur to the junction between the epoxy resin and the metal flange. In this paper,we study the influence of the metal flange hole size and structure on the electric field intensity on the basin insulator surface and the surface of the pouring hole. The studies suggest that the maximum field intensity on the surface of the large-sized pouring hole a is 0.85 kV/mm,much larger the maximum value of 0.38 kV/mm for the small-sized pouring hole and the smaller the hole,the smaller the maximum electric field intensity on the surface of the pouring hole. Therefore,under the premises of meeting the measurement requirements,the opening should be made as small as possible.
出处
《电网与清洁能源》
北大核心
2015年第5期27-31,35,共6页
Power System and Clean Energy
关键词
GIS
浇注孔
盆式绝缘子
金属法兰
电场
gas insulated substation
pouring hole
disctype insulator
mental flange
electric field
