Ageing rate of paper insulation used in power transformers Part 1: Oil/paper system with low oxygen concentration

Lelekakis, Nick, Martin, Daniel and Wijaya, Jaury (2012) Ageing rate of paper insulation used in power transformers Part 1: Oil/paper system with low oxygen concentration. IEEE Transactions on Dielectrics and Electrical Insulation, 19 6: 1999-2008. doi:10.1109/TDEI.2012.6396958


Author Lelekakis, Nick
Martin, Daniel
Wijaya, Jaury
Title Ageing rate of paper insulation used in power transformers Part 1: Oil/paper system with low oxygen concentration
Journal name IEEE Transactions on Dielectrics and Electrical Insulation   Check publisher's open access policy
ISSN 1070-9878
1558-4135
Publication date 2012
Year available 2012
Sub-type Article (original research)
DOI 10.1109/TDEI.2012.6396958
Volume 19
Issue 6
Start page 1999
End page 2008
Total pages 10
Place of publication Piscataway, NJ United States
Publisher I E E E
Collection year 2013
Language eng
Formatted abstract
A substantial quantity of testing has been performed on the degradation of paper insulation over the decades. The aim being to better educate the electrical industry on how to best operate expensive assets, such as transformers. The longevity of paper insulation is frequently tested using accelerated ageing experiments, where the effects of temperature and the chemical environment on paper lifespan can be studied. Such research has resulted in paper life expectancy curves being published by the IEEE and the IEC. The investigations tend to use sealed vessels. However, the disadvantage of using this method is that the water content of the paper changes during the ageing process which then changes the ageing rate. In these ageing experiments the water and oxygen content was controlled using a special test rig to compare the ageing rate to previous work and to determine the ageing effect of paper by combining temperature, water content of paper and oxygen content of the oil. We found that the rate of paper ageing can be more accurately determined by controlling the water and oxygen during the experiment which then produced noticeable changes in predicting life expectancy.
Keyword Ageing
Cellulose
Hydrolysis
Powertransformer
Transformer ageing
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Non HERDC
School of Information Technology and Electrical Engineering Publications
 
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Created: Fri, 20 Sep 2013, 08:41:01 EST by Daniel Martin on behalf of School of Information Technol and Elec Engineering