Identification of simultaneously active partial discharge sources using combined radio frequency and IEC60270 measurement

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

    Research output: Contribution to journalArticle

    Abstract

    Using a newly developed measurement system, partial discharge (PD) activity has been recorded simultaneously on a pulse-by-pulse basis in terms of radiated radio frequency (RF) energy and the conducted apparent charge measured according to the IEC60270 standard. Two epoxy resin insulation samples containing voids have been activated separately and in parallel and the resulting PD was measured using the combined system. It has been shown that the combined measurement system has the ability to distinguish between discharges occurring simultaneously in each of the respective samples. This is evident in the appearance of separate clusters when the energy of the radio frequency discharge signal is plotted against the apparent charge for a large number of pulses. The identity of the defect producing each cluster has been confirmed by modelling the complete response of a gas-insulated-switchgear chamber to simulated Gaussian current pulses of known charge.
    Original languageEnglish
    Pages (from-to)102-108
    Number of pages7
    JournalIET Science Measurement and Technology
    Volume5
    Issue number3
    DOIs
    Publication statusPublished - May 2011

    Keywords

    • partial discharge
    • radio frequency energy

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