A refined mathematical model for prediction of bubble evolution in transformers

Measurements of physical characteristics have been made for the materials in a transformer oil-cellulose insulation system. Algorithms were generated for the temperature dependence of the Henry's law constant for water in mineral oil and the partial pressure of water vapor in oil-impregnated ce...

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Bibliographic Details
Published inIEEE transactions on power delivery Vol. 4; no. 1; pp. 391 - 404
Main Authors Fessler, W.A., Rouse, T.O., McNutt, W.J., Compton, O.R.
Format Journal Article Conference Proceeding
LanguageEnglish
Published New York, NY IEEE 01.01.1989
Institute of Electrical and Electronics Engineers
Subjects
Applied sciences
Conductors
Dielectrics and electrical insulation
Electrical engineering. Electrical power engineering
Exact sciences and technology
Gas insulation
Gases
Mathematical model
Oil insulation
Petroleum
Power transformer insulation
Temperature
Thermal decomposition
Transformers and inductors
Electric transformer
Bubble
Insulating oil
Cellulose
Prediction
Mineral oil
Mathematical model
Temperature variation
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Summary:Measurements of physical characteristics have been made for the materials in a transformer oil-cellulose insulation system. Algorithms were generated for the temperature dependence of the Henry's law constant for water in mineral oil and the partial pressure of water vapor in oil-impregnated cellulose having varying moisture contents. More precise information was also obtained for the rate of water generation from thermal decomposition of cellulose. These data were used to refine a mathematical model for identification of conditions suitable for free gas bubble evolution in transformers under changing temperature conditions. The modified model was applied in several parametric analyses of conditions in an operating transformer to illustrate the role of the principle variables.< >
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0885-8977
1937-4208
DOI:10.1109/61.19229