Summary of GIS Insulation Study
YU Jian-hui · Shaanxi Electric Power · 2013
Gas insulated switchgears play an important position in the power system.But the partial discharge would occur because of insulation defect.PD will lead to the GIS insulation damage after a long time.Therefore,PD detection is particularly important.The secondary physical phenomena,including the phenomena of sound,light,electromagnetic waves and gas decomposition products and so on are detected.At present,many scholars at home and abroad have made a comprehensive study on insulation detection technology of GIS and have achieved a large number of results.A detailed overview on the detection technical of GIS insulation state and SF_6 alternative gas are made,including GIS platform and the simulation of typical insulation defects,UHF electromagnetic wave propagation characteristics,SF_6 decomposition gases,SF_6 alternative gas and pattern recognition.These works provide a valuable reference for the follow-up study of GIS.