Title :
Partial discharges in SF6/N2 GIS-effects of metallic protrusion near the spacer
Author :
Phung, B.T. ; Blackburn, T.R.
Author_Institution :
Sch. of Electr. Eng. & Telecommun., New South Wales Univ., Sydney, NSW, Australia
Abstract :
To avoid exacerbating the environmental problem of global warming, SF6/N2 gas mixtures are increasingly being used as substitutes to pure SF6 in high voltage apparatus. This paper investigates the partial discharge behaviour of such gas mixtures, caused by the presence of a metallic protrusion near the spacer. Different ratios of these two gases at standard atmospheric pressure are tested under ac electric stress and the phase-resolved discharge patterns are compared. The proximity effect of the protrusion in relation to the spacer is considered.
Keywords :
corona; finite element analysis; gas mixtures; nitrogen; partial discharge measurement; sulphur compounds; N2; SF6; SF6-N2; SF6/N2 GIS-effects; ac electric stress; gas mixtures; global warming; high voltage apparatus; metallic protrusion; partial discharge; phase-resolved discharge patterns; proximity effect; spacer; standard atmospheric pressure; Electrodes; Gases; Geographic Information Systems; Needles; Partial discharges; Pressure gauges; Sulfur hexafluoride; Testing; Valves; Voltage;
Conference_Titel :
Properties and Applications of Dielectric Materials, 2003. Proceedings of the 7th International Conference on
Print_ISBN :
0-7803-7725-7
DOI :
10.1109/ICPADM.2003.1218346
