THE STUDY ON MEASURING TECHNIQUE OF PARTIAL DISCHARGE IN GAS INSULATED SWITCHGEAR USING ULTRA HIGH FREQUENCY METHOD WITH EXTERNAL SENSORS

摘要

GISisusedwidelyallovertheworld,because theareaoccupiedbyaGISsubstationistypicallyon ly10-25%ofthatoftheequivalentairinsulated installation.Inordertoattainmorehighdegreeof reliabilityforGIS,thefailurescausedduringmanu facture,assemblinganderectionwillbeavoided.Themorecommondefectsincludeprotrusiononthe highvoltageconductororenclosure;particlesonin sulator(spacer),freemovingparticlesinsidethe enclosure.AsthedefectsthatcouldleadtoGISfail urecanbedetected.Andtheinsulationconditions ofapparatusaremonitoredbymean...