Title :
On the stochastic nature of SF6 partial discharges close to onset conditions
Author :
Fréchette, M.F. ; Hudon, C. ; Germain, M. ; Larocque, R.Y. ; Matsumoto, S. ; Umemura, T.
Author_Institution :
Recherche et Developpement, IREQ, Varennes, Que., Canada
Abstract :
Discharges in compressed pure SF6 were produced in a plane-point-plane electrode configuration. The present report focuses on the pulse characteristics, as observed by recording real-time discharge frames via a fast digitizer. Sampling by frame of a duration of typically 1 ms with time resolution of 1 ns, has given access to the relation between consecutive pulses. Results obtained for the negative DC corona at 500 kPa are presented. Discharge characteristics closeby corona threshold were overexamined in detail. The experimental approach, in conjunction with the rendered-possible analyses, allowed to unravel very distinctive features associated with the discharge events
Keywords :
SF6 insulation; corona; partial discharges; stochastic processes; 500 kPa; SF6; compressed pure gas insulation; conditional analysis; corona threshold; fast digitizer; negative DC corona; onset conditions; partial discharges; plane-point-plane electrode configuration; pulse characteristics; real-time discharge frames; scattered discharge phenomena; space charge; stochastic nature; Corona; Disk recording; Electrodes; Insulation; Partial discharges; Pollution measurement; Sampling methods; Stochastic processes; Sulfur hexafluoride; Time measurement;
Conference_Titel :
Electrical Insulation, 2000. Conference Record of the 2000 IEEE International Symposium on
Conference_Location :
Anaheim, CA
Print_ISBN :
0-7803-5931-3
DOI :
10.1109/ELINSL.2000.845532
