Title :
The combined effect of moisture, temperature and conducting particles on the discharge behaviour of sulphur hexafluoride
Author :
Peng, D.H. ; Li, Z.Y. ; MacAlpine, J.M.K.
Author_Institution :
Dept. of Electr. Eng., Huazhong Univ. of Sci. & Technol., Wuhan, China
Abstract :
Measurements have been made of DC corona onset and breakdown voltages for both positive and negative point/plane electrode systems in compressed sulphur hexafluoride in the presence of water vapour. The presence of moisture lowered the onset voltages and raised the breakdown voltages significantly. The effect of moisture on flashover voltages in the presence of metallic particles was also investigated and the results showed that there was little effect except when moisture was likely to be condensing of the spacer surface; if the moisture froze there was again little effect. The reduction in flashover voltage due to moisture was independent of and in addition to the effect of the presence of a metallic particle
Keywords :
SF6 insulation; corona; electric breakdown; flashover; moisture; DC corona onset; SF6; breakdown voltages; compressed sulphur hexafluoride; flashover voltages; metallic particles; moisture; negative point/plane electrode systems; onset voltages; positive point/plane electrode systems; water vapour; Breakdown voltage; Corona; Electrodes; Flashover; Moisture; Pollution measurement; Sulfur hexafluoride; Switchgear; Temperature; Water pollution;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1999 Annual Report Conference on
Conference_Location :
Austin, TX
Print_ISBN :
0-7803-5414-1
DOI :
10.1109/CEIDP.1999.804673
