Title :
On the stability of mineral insulating oils under electrical stress
Author :
Fofana, I. ; Bouaicha, A. ; Farzaneh, M. ; Volat, C. ; Sabau, J.
Author_Institution :
Dept. of Insulating Liquids & Mixed Dielectrics for Electrotechnol., Univ. of Quebec at Chicoutimi, Chicoutimi, QC, Canada
fDate :
May 31 2009-June 3 2009
Abstract :
There is a general agreement that in service conditions the quality of mineral insulating oils gradually deteriorates under the impact of electrical, thermal and chemical stress. It is also widely accepted that only the incipient electrical failures such as hot spots and partial discharges are responsible for the gassing of oil. Nevertheless, the relationship between the cause and the symptoms of paper insulation deterioration is not clearly understood. This article intends to show that the gassing of oil is a more complex phenomenon. It provides experimental evidence that the chemical composition of hydrocarbon blend and the oil born decay products are also contributing factors to oil gassing.
Keywords :
blending; electrical faults; minerals; paper; power transformer insulation; transformer oil; chemical stress; electrical stress; hydrocarbon blend; mineral insulating oil stability; paper insulation deterioration; power transformers; service conditions; thermal stress; Dielectric liquids; Dielectrics and electrical insulation; Gas insulation; Hydrocarbons; Minerals; Oil insulation; Petroleum; Power transformer insulation; Stability; Thermal stresses;
Conference_Titel :
Electrical Insulation Conference, 2009. EIC 2009. IEEE
Conference_Location :
Montreal, QC
Print_ISBN :
978-1-4244-3915-7
Electronic_ISBN :
978-1-4244-3917-1
DOI :
10.1109/EIC.2009.5166395
