Characteristics of the first pre-discharge current pulse in SF6 under a steep fronted impulse voltage

Nielsen, Shawn D. & Reynders, Jan P. (2001) Characteristics of the first pre-discharge current pulse in SF6 under a steep fronted impulse voltage. In 12th International Symposium on High Voltage, 20-24 August 2001, Bangalore, India.


An improved understanding of the characteristics of the pre-discharge current pulses in GIS will lead to improved analyses of the results from the UHF partial discharge detection method. This paper presents the characteristics of the first pre-discharge current pulses from a point-to-plain geometry at 1 bar absolute under both polarities of a 1.1/80 us lightning impulse. The analysis has shown that the pre-discharge current wave shape, peak current magnitude and charge is effected by the instantaneous voltage at which the pre- discharge took place as well as the polarity of the active electrode. The measured results show that protrusions on the electrodes have slower wave shape parameters than those reported for free conducting particles.

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ID Code: 86948
Item Type: Conference Paper
Refereed: No
Keywords: Partial Discharge, SF6, Impluse, Current Pulse
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2001 [please consult the authors]
Deposited On: 27 Aug 2015 04:10
Last Modified: 29 Aug 2015 17:10

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