This research aims to study the concentrations of gases based on the Dissolved Gas Analysis (DGA) in power transformer oil. The DGA methods(Roger’s ratio method, IEC ratio method, and Doernenburg ratio method) are used to develop a computer program for precise diagnosis and simultaneous assessment. This paper used C++ software and matched it with IEC standard 599 to identify the fault types and IEEE standard C57-104.1991 to assess oil quality as per TCG. The appropriate treatments, including single filtering and degassing, double filtering and degassing, and reclamation, are applied without reusing the oil. Suitable treatment is achieved via Roger’s ratio method, IEC ratio method, and Sonnenburg ratio method depending on the dissolved gas analysis in the oil. The C ++ program and windows are easy to use and are high enough for fault diagnosis and oil quality evaluation. The programing can assess the oil quality as per IEEE standard and C57-104 -1991 and IEC standard 599 specifications.

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M. M. Yaacob, A. R. Hussein, M. F. Othman, “A computer program for fault diagnosis and assessment of quality insulation oil in power transformer based dissolved gas analysis,” International Journal of Technology and Engineering Studies, vol. 1, no. 3, pp. 98-106, 2015.