Investigation on emitted energy during breakdown in transformer oil AC voltage

S. Abdi, A. Boubakeur, N. Harid, A. Haddad

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

The risk of breakdown in mineral insulating oil constitutes a critical part in the insulation of high voltage apparatus such as transformer. This paper presents an experimental investigation on transformer oil dynamic breakdown characteristics when subjected to AC voltage. Breakdown tests were carried out on mineral oil samples using a sphere-sphere electrode test cell for various gap lengths 1mm, 2.5mm and 5mm and at different voltage speed ramps: 0.5kV/s, 2kV/s and 3.5kV/s. The emitted energy of the mineral oil samples was determined from the instantaneous product of voltage and current. Such emitted energy can be used to explore the properties of the arc and its development within the oil. The results of this investigation show that the gap length and the voltage speed ramp have a significant influence on the emitted energy of the oil during breakdown.

Original languageBritish English
Title of host publication2010 45th International Universities' Power Engineering Conference, UPEC 2010
StatePublished - 2010
Event2010 45th International Universities' Power Engineering Conference, UPEC 2010 - Cardiff, United Kingdom
Duration: 31 Aug 20103 Sep 2010

Publication series

NameProceedings of the Universities Power Engineering Conference

Conference

Conference2010 45th International Universities' Power Engineering Conference, UPEC 2010
Country/TerritoryUnited Kingdom
CityCardiff
Period31/08/103/09/10

Keywords

  • AC voltage
  • Breakdown current
  • Breakdown voltage
  • Emitted energy
  • Gap length
  • Transformer oil
  • Voltage ramp-speed

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