Aging effect of coconut oil as transformer liquid insulation — Comparison with mineral oil

Author

Matharage, B. S H M S Y ; Bandara, M.A.A.P. ; Fernando, M.A.R.M. ; Jayantha, G.A. ; Kalpage, C.S.

Author_Institution

Dept. of Electr. & Electron. Eng., Univ. of Peradeniya, Peradeniya, Sri Lanka

fYear

2012

fDate

6-9 Aug. 2012

Firstpage

1

Lastpage

6

Abstract

Coconut oil has been considered as an alternative choice for power transformer liquid insulation. This paper presents ageing aspects of coconut oil in comparison to that of transformer oil. Wet coconut oil and wet and dry transformer oil was aged in sealed and unsealed conditions at 120°C. Variation of color, interfacial tension, acidity, breakdown voltage and frequency dielectric spectroscopy was observed during different aging period of 2, 4, and 7 weeks. In the aging process, the acidity and conductivity levels of coconut oil increased. However, its breakdown strength was considerably high compared to transformer oil showing a possibility of using as a transformer liquid insulation.

Keywords

ageing; electric breakdown; power transformer insulation; transformer oil; acidity; aging process effect; breakdown voltage strength; coconut oil; frequency dielectric spectroscopy; interfacial tension; mineral oil; power transformer liquid insulation; temperature 120 degC; time 2 week; time 4 week; time 7 week; transformer oil; Aging; Circuit faults; Color; Conductivity; Oil insulation; Power transformer insulation; Breakdown Voltage; Coconut oil; Conductivity; Frequency Dielectric Spectroscopy; Loss Tangent; Permittivity; Transformer oil;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial and Information Systems (ICIIS), 2012 7th IEEE International Conference on

Conference_Location

Chennai

Print_ISBN

978-1-4673-2603-2

Type

conf

DOI

10.1109/ICIInfS.2012.6304770

Filename

6304770