LAPSE:2018.0991
Published Article
LAPSE:2018.0991
Performance of Natural Ester as a Transformer Oil in Moisture-Rich Environments
Kapila Bandara, Chandima Ekanayake, Tapan Saha, Hui Ma
November 27, 2018
Interest has risen among utilities in using natural ester (NE) insulating oils in transformers as a substitute for conventional mineral oil. However, present understanding on aging behaviour of NE-paper composite insulation system and knowledge on application of existing condition monitoring tools for NE-based insulation are inadequate. This limits the cost effective and reliable field applications of NE insulating oil. To pave the way the application of NE-based insulation in transformers, a systematic study has been performed to compare the aging behaviour of transformer grade pressboard (PB) impregnated in NE and conventional mineral oil. Applicability of a number of chemical and physical parameters, including acidity value, dielectric dissipation factor (DDF), viscosity, and colour for assessing the quality of NE insulating oil is also discussed in this paper. Comparisons are made based on the limiting values provided in the related IEEE Standard and properties of mineral oil under similar aging conditions.
Keywords
acidity, ageing, colour, dielectric dissipation factor (DDF), hydrolysis, mineral oil, natural ester (NE), oxidation, viscosity
Suggested Citation
Bandara K, Ekanayake C, Saha T, Ma H. Performance of Natural Ester as a Transformer Oil in Moisture-Rich Environments. (2018). LAPSE:2018.0991
Author Affiliations
Bandara K: School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, QLD 4072, Australia [ORCID]
Ekanayake C: School of Engineering, Griffith University, Gold Coast, QLD 4222, Australia
Saha T: School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, QLD 4072, Australia [ORCID]
Ma H: School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, QLD 4072, Australia [ORCID]
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Journal Name
Energies
Volume
9
Issue
4
Article Number
E258
Year
2016
Publication Date
2016-03-31
Published Version
ISSN
1996-1073
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PII: en9040258, Publication Type: Journal Article
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LAPSE:2018.0991
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doi:10.3390/en9040258
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Nov 27, 2018
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Nov 27, 2018
 
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Nov 27, 2018
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Calvin Tsay
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