Title :
Laboratory investigation of treated coconut oil as transformer liquid insulation
Author :
Hinduja, D. ; Gayathri ; Kalpage, C.S. ; Fernando, M.A.R.M.
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. of Peradeniya, Peradeniya, Sri Lanka
Abstract :
This paper presents laboratory investigation of treated coconut oil as alternative to liquid insulation of power transformers. Thirteen different virgin and treated coconut oil samples consisting three different brands were used for the investigation. Frequency Dielectric Spectroscopy measurements were conducted on the samples at room temperature and at high temperature of 65°C. The conductivity, loss tangent, permittivity and the activation energy were calculated and used for the analysis. It was found that the conductivity improved slightly with heat treatment and neutralization process. However, during one week ageing, the conductivity improved significantly. It suggested that with proper treatment, coconut oil can be used as alternative transformer liquid insulation.
Keywords :
heat treatment; power transformer insulation; transformer oil; activation energy; coconut oil treatment; frequency dielectric spectroscopy measurement; heat neutralization process; heat treatment process; laboratory investigation; loss tangent; power transformer liquid insulation; temperature 293 K to 298 K; temperature 65 degC; Aging; Conductivity; Oil insulation; Permittivity; Power transformer insulation; Temperature measurement; Coconut oil; Frequency Dielectric Spectroscopy; Loss Tangent; Transformer;
Conference_Titel :
Industrial and Information Systems (ICIIS), 2011 6th IEEE International Conference on
Conference_Location :
Kandy
Print_ISBN :
978-1-4577-0032-3
DOI :
10.1109/ICIINFS.2011.6038050
