An updated model to determine the life remaining of transformer insulation

Martin, Daniel, Cui, Yi, Ekanayake, Chandima, Ma, Hui and Saha, Tapan (2015) An updated model to determine the life remaining of transformer insulation. IEEE TRANSACTIONS ON POWER DELIVERY, 30 1: 395-402. doi:10.1109/TPWRD.2014.2345775


Author Martin, Daniel
Cui, Yi
Ekanayake, Chandima
Ma, Hui
Saha, Tapan
Title An updated model to determine the life remaining of transformer insulation
Journal name IEEE TRANSACTIONS ON POWER DELIVERY   Check publisher's open access policy
ISSN 0885-8977
1937-4208
Publication date 2015-02
Year available 2014
Sub-type Article (original research)
DOI 10.1109/TPWRD.2014.2345775
Open Access Status
Volume 30
Issue 1
Start page 395
End page 402
Total pages 8
Place of publication Piscataway, NJ, United States
Publisher Institute of Electrical and Electronics Engineers
Collection year 2016
Language eng
Abstract In this paper, we present an update to the models used to calculate the remaining life of transformer paper insulation. A drawback to the current IEEE method is that it does not take into account the availability of water and oxygen on the life expectancy of Kraft paper insulation. We therefore set out to test an algorithm which does take these into account. For our investigation, we loaded three test transformers and ran them to near their end of life. Kinetic equations were applied to model the fall in the degree of polymerization of paper. Our model showed better agreement with the test results than that given from using the IEEE standard. The IEEE standard gives life expectancy for Kraft paper being aged in minimal oxygen under dry conditions, which is not necessarily representative of an old transformer. Wet paper and using high levels of oxygen can age nearly 40 times faster. The IEEE method needs to take the synergistic effect of water and oxygen on increasing the rate of paper aging into account.
Keyword Oil insulation
Paper insulation
Power transformer insulation
Power transformers
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2015 Collection
School of Information Technology and Electrical Engineering Publications
 
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Created: Sat, 14 Mar 2015, 11:28:38 EST by Yi Cui on behalf of School of Information Technol and Elec Engineering