Metal Particle Contamination in Gas-insulated Switchgears/Gas-insulated Transmission Lines  

作　　者：Jian Wang Qi Hu Yanan Chang Jingrui Wang Ruixue Liang Youping Tu Chuanyang Li Qingmin Li 

机构地区：[1]State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources and the Beijing Key Laboratory of High Voltage and EMC,North China Electric Power University,Beijing 102206,China. [2]Department of Electrical Engineering,Tsinghua University,Beijing 100084,China.

出　　处：《CSEE Journal of Power and Energy Systems》2021年第5期1011-1025,共15页中国电机工程学会电力与能源系统学报（英文）

基　　金：supported in part by the National Basic Research Program of China(973 Program)(2014CB239500);the National Natural Science Foundation of China(51737005&51807060),Beijing Municipal Natural Science Foundation(3192036);the Fundamental Research Funds for the Central Universities(2018MS165).

摘　　要：Metal particle contamination in a gas-insulated switchgear(GIS)or a gas-insulated transmission line(GIL)is an important factor leading to the decline of insulation performance.Exploring the deterioration mechanism and suppression measures of metal particles on insulation is a key technical problem in enhancing the dielectric strength of GIS/GIL equipment.In this paper,the charge and motion characteristics of metal particles are first introduced.The gas gap breakdown caused by free metal particles and the surface flashover caused by metal particles near or adsorbed on the insulator are then analyzed according to different particle motion patterns and spatial locations.Subsequently in terms of operation managements,the existing methods of particle detection are analyzed.In addition,the main inhibition methods of metal particles are introduced from three aspects:particle trap,insulator surface treatment and electrode coating.Finally,the prospects in the future research on particle pollution in GIS/GIL are also pointed out.

关 键 词：Gas gap breakdown GIS/GIL metal particles particle detection particle suppression surface flashover 

分 类 号：TM75[电气工程—电力系统及自动化]