降低GIS母线绝缘子低电位气隙处电场强度值的方法研究  

Research on the Method of Reducing the Electric Field Strength at the Low Potential Air Gap of GIS Busbar Insulators

作　　者：王娜 张浩 WANG Na;ZHANG Hao(Shenyang Institute of Science and Technology,Department of Information and Control Engineering,Shenyang 110166,Liaoning,China;Shenyang Institute of Engineering,School of electric power,Shenyang 110136,Liaoning,China)

机构地区：[1]沈阳科技学院信息与控制工程系,辽宁沈阳110166 [2]沈阳工程学院电力学院,辽宁沈阳110136

出　　处：《阀门》2024年第8期940-945,共6页Chinese Journal of Valve

摘　　要：母线绝缘子是GIS的重要部件,在GIS设备中起到连接高电位部件与地电位外壳、支撑以及对地绝缘的作用,还可以将GIS设备分成若干个气室。绝缘子沿面电场强度的大小及均匀性极大地影响了母线整体的绝缘性能。绝缘子低电位与罐体法兰连接处有微小的气隙,经计算,该气隙处电场强度值较大,有较多绝缘子放电与该气隙处有关的现场运行案例。本文提出了降低该气隙处电场强度值的三种方法,即:增大气隙、增加接地屏蔽装置、改变罐体法兰形状。三种方法均可以有效地降低绝缘子低电位气隙电场强度值,产品设计时,可根据实际结构进行选择。本文为GIS产品结构设计提供了指导方向。Busbar insulator is an important part of GIS.It plays a role in connecting high potential components with ground potential shell,support and ground insulation in GIS equipment.It can also divide GIS equipment into several gas chambers.The size and uniformity of the surface electric field intensity of the insulator greatly affect the overall insulation performance of the busbar.There is a small air gap at the connection between the low potential of the insulator and the flange of the tank.After calculation,the electric field intensity value at the air gap is large,and there are many on-site operation cases of insulator discharge related to the air gap.In this paper,three methods are proposed to reduce the electric field intensity at the air gap,namely,increasing the air gap,increasing the grounding shielding device,and changing the shape of the tank flange.The three methods can effectively reduce the low potential air gap electric field strength value of insulator,and the product design can be selected according to the actual structure.This paper provides guidance for the structural design of GIS products.

关 键 词：绝缘子 气隙 接地屏蔽 电场强度 

分 类 号：TM85[电气工程—高电压与绝缘技术]