DocumentCode
1125207
Title
Improving the reliability of transformer gas-in-oil diagnosis
Author
Duval, Michel ; Dukarm, James
Author_Institution
IREQ, Varennes, Que., Canada
Volume
21
Issue
4
fYear
2005
Firstpage
21
Lastpage
27
Abstract
Dissolved gas analysis (DGA) is widely used to detect incipient faults in oil-filled electrical equipment. There is always some degree of inaccuracy in laboratory dissolved-gas measurements, especially at low gas concentrations, which affects gas ratios and other diagnostic calculations. This paper examines the measurement inaccuracy problem in detail using recent CIGRE data. It shows how proper allowance for this inaccuracy can improve transformer condition assessment and diagnosis by DGA.
Keywords
condition monitoring; fault location; measurement uncertainty; reliability; statistical analysis; transformer oil; dissolved-gas analysis; fault detection; oil-filled electrical equipment; statistical calculations; transformer condition assessment; transformer gas-in-oil diagnosis; Costs; Dissolved gas analysis; Electrical fault detection; Fault diagnosis; IEC standards; Laboratories; Oil insulation; Petroleum; Power transformer insulation; Reproducibility of results;
fLanguage
English
Journal_Title
Electrical Insulation Magazine, IEEE
Publisher
ieee
ISSN
0883-7554
Type
jour
DOI
10.1109/MEI.2005.1489986
Filename
1489986
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