Compare the performance of natural ester with synthetic ester as transformer insulating oil

Bandara, Kapila, Ekanayake, Chandima and Saha, Tapan Kumar (2015). Compare the performance of natural ester with synthetic ester as transformer insulating oil. In: 2015 IEEE 11th International Conference on the Properties and Applications of Dielectric Materials (ICPADM). International Conference on the Properties and Applications of Dielectric Materials (ICPADM), Sydney, NSW, Australia, (975-978). 19-22 July 2015. doi:10.1109/ICPADM.2015.7295437


Author Bandara, Kapila
Ekanayake, Chandima
Saha, Tapan Kumar
Title of paper Compare the performance of natural ester with synthetic ester as transformer insulating oil
Conference name International Conference on the Properties and Applications of Dielectric Materials (ICPADM)
Conference location Sydney, NSW, Australia
Conference dates 19-22 July 2015
Convener IEEE
Proceedings title 2015 IEEE 11th International Conference on the Properties and Applications of Dielectric Materials (ICPADM)
Journal name Proceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials
Place of Publication Piscataway, NJ, United States
Publisher IEEE (Institute for Electrical and Electronic Engineers)
Publication Year 2015
Sub-type Fully published paper
DOI 10.1109/ICPADM.2015.7295437
ISBN 9781479989034
ISSN 2160-9241
Volume 2015-October
Start page 975
End page 978
Total pages 4
Collection year 2016
Language eng
Abstract/Summary Natural and synthetic esters are considered as potential candidates to replace mineral oil in power transformers. However, there is comparatively less experience on usage of ester-based insulating liquids in large power transformers. The high reliability and safety level required for large power transformers lead to careful assessment of the use of ester as the insulating liquid in these units. Therefore, this study assesses the ageing behavior of the dry pressboard insulation immersed in a commercially available natural ester and a synthetic ester through accelerated ageing experiment. At different stages of ageing, oil conditions are analyzing by measuring acidity value, 2-furaldehyde (2-FAL) concentration and kinematic viscosity. Dissolved Gas Analysis (DGA) is also performed to assess the degradation of both pressboard and oil. Moreover, the change of AC breakdown strength of natural and synthetic ester due to mixing with mineral oil (new and aged) is analyzed. This paper reveals that pressboard ageing in both types of oils associates with dissolved 2-FAL and CO2+CO concentration in oil. It has been observed that there is different gassing behavior between natural and synthetic ester due to thermal ageing. This paper reveals that, the AC breakdown strength of both types of ester used in this study decline due to mixing with mineral oil.
Keyword Acidity
AC breakdown strength
Degree of Polymerization (DP)
DGA
2-furaldehyde
Natural ester
Synthetic ester
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ

 
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Created: Mon, 29 Feb 2016, 11:53:35 EST by Kapila Senarath Bandara Kahawaththa Mudiyanselage on behalf of School of Information Technol and Elec Engineering