Partial discharge current pulses in SF6 and the effect of superposition of their radiometric measurement

Alistair Reid, Martin D. Judd, Brian G. Stewart, Richard A. Fouracre

    Research output: Contribution to journalArticle

    Abstract

    The practical advantages of employing non-contact radio frequency (RF) methods for detecting partial discharges (PDs) in high voltage equipment have led to significant effort being focused on the diagnosis of electrical plants using RF techniques. This has particularly been the case for gas insulated substations, which use sulphur hexafluoride (SF6) as an insulating medium. One of the most important challenges facing RF diagnostics is the problem of relating the RF emissions to some measure of severity of the PD. Previous work has established that the amplitude or energy of RF signals radiated from a PD source is strongly dependent on the rate of change of current in the PD pulse. In this paper, measurements of PD current pulses in SF6 are presented for a point-plane configuration using an extremely wide bandwidth (13 GHz) measurement system.

    Original languageEnglish
    JournalJournal of Physics D: Applied Physics
    Publication statusPublished - Oct 2006

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