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Dissolved gas analysis for common transformer faults in soy seed-based oil

Muhamad, Nor Asiah and Phung, B. T. and Blackburn, T. R. (2011) Dissolved gas analysis for common transformer faults in soy seed-based oil. IET Electric Power Applications, 5 (1). pp. 133-142. ISSN 1751-8660

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Official URL: http://dx.doi.org/10.1049/iet-epa.2010.0030

Abstract

This study presents experimental results on the application of dissolved gas-in-oil analysis (DGA) technique to a soy seed-based oil and mineral oil. The investigations covered three common types of transformer faults: partial discharge, arcing and overheating. Experiments were performed on laboratory models of transformer windings immersed with the test oils at three different moisture levels (low, medium or high) and with or without the presence of solid insulating materials (pressboard). Five key dissolved hydro-carbon gases, namely hydrogen (H 2), methane (CH 4), ethane (C 2H 6), ethylene (C 2H 4) and acetylene (C 2H 2), generated by the three fault types in soy seed oil are analysed and compared with mineral oil fault gases. The classical Duval Triangle and Roger's ratio methods are applied to classify the fault type. The findings confirm direct application of classical DGA faults interpretation methods, developed for mineral oils, to non-mineral oils is flawed and their modifications are necessary.

Item Type:Article
Uncontrolled Keywords:dissolved gas analysis, dissolved gas in oil analysis, fault gas, fault types, hydro-carbon gas, interpretation methods, laboratory models, moisture level, ratio method, seed oil, transformer faults
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:28964
Deposited By: Liza Porijo
Deposited On:06 Dec 2012 08:32
Last Modified:06 Dec 2012 08:32

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