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Author Sabau, J. ♦ Silberg, L. ♦ Vaillancourt, P.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2002
Language English
Subject Keyword Petroleum ♦ Aging ♦ Power transformers ♦ Dissolved gas analysis ♦ Dielectric liquids ♦ Thermal stresses ♦ Power generation ♦ Maintenance ♦ Testing ♦ Gas insulation
Abstract The cause of incipient electrical failures that generate gas evolvements in high voltage power transformers is currently diagnosed by interpreting the results of dissolved gas analysis (DGA). According to the existing condition-based maintenance procedures for liquid insulation, there is no relationship between the gassing tendency of oil and its degree of aging. Incipient electrical failures are considered to be solely responsible for the dissolved gas content of oil. Over the past years progress has been made in the testing procedures for insulating oils which has provided evidence that in certain cases the reclamation of aged oils reduces the level of gases generated by this complex blend of hydrocarbons. Thus, by selectively removing decay products from oils in service, the interpretation of DGA can be significantly improved and the cost effectiveness of reclamation technology economically justified. This paper intends to present evidence that besides incipient electrical failures, the purity of liquid insulation also plays a role in gas evolvement under electric and thermal stress.
Description Author affiliation: InsOil Canada Ltd., Calgary, Alta., Canada (Sabau, J.)
ISBN 0780375025
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2002-10-20
Publisher Place Mexico
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 296.43 kB
Page Count 4
Starting Page 408
Ending Page 411


Source: IEEE Xplore Digital Library