An investigation of discharges in oil insulation using UHF PD detection

G.P. Cleary, M.D. Judd

Research output: Contribution to conferencePaper

10 Citations (Scopus)


In this paper, partial discharge (PD) is generated using a range of electrode configurations in an oil insulated system. High voltage AC at 50 Hz is applied to each test configuration and the PD activity is recorded using an ultra high frequency (UHF) monitoring system. The PD signals are analysed in a phase resolved form, from which the corresponding statistical distributions are determined. The results indicate that different defect types can be distinguished on the basis of their phase-resolved patterns measured at UHF. Possible physical causes for the discharge patterns are discussed.

Original languageEnglish
Number of pages4
Publication statusPublished - Jul 2002
Event2002 IEEE 14th International Conference on Dielectric Liquids. - Graz, Austria
Duration: 7 Jul 200212 Jul 2002


Conference2002 IEEE 14th International Conference on Dielectric Liquids.


  • electrodes
  • voltage
  • system testing
  • signal resolution
  • signal analysis
  • petroleum
  • partial discharges
  • oil insulation
  • monitoring
  • frequency
  • investigation
  • discharges
  • oil insulation
  • UHF PD detection

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