Electro-acoustic detection, identification and location of partial discharge sources in oil-paper insulation system Articles uri icon

publication date

  • October 2012

start page

  • 1569

end page

  • 1578

issue

  • 5

volume

  • 19

international standard serial number (ISSN)

  • 1070-9878

electronic international standard serial number (EISSN)

  • 1558-4135

abstract

  • The detection of Partial Discharges (PD) is a reliable technique to analyze the status of electrical insulation in power transformers. Phase resolved partial discharge patterns are being complemented with high frequency pulse waveform analysis, in order to identify discharge sources. In addition to this, acoustic techniques are being implemented trying to locate PD sites in large power transformers. In this work, an inductive loop sensor will be used to identify two different PD sources by means of the energy distribution of the detected waveforms. Additionally, these PD sources will be located by means of acoustic measurements with an electrical reference, through the analysis of the acoustic activity detected for each sensor individually.

keywords

  • partial discharges ; oil-paper insulation systems ; inductive sensor ; acoustic emission ; source location ; power transformers