Transformer diagnostics using dissolved gas analysis and polarisation and depolarisation current measurements - A case study

Author(s)
Jadav, Raj B.
Saha, Tapan
Ekanayake, Chandima
Griffith University Author(s)
Year published
2011
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Abstract
This paper presents analysis of the measurements carried out on three distribution substation transformers. Dissolved Gas Analysis (DGA) and Polarisation/Depolarization Current (PDC) measurements were carried out on three transformers. DGA analysis is carried out using Ratio methods and Duval's triangle. In addition, furan and moisture analysis are done from the oil samples. Then, PDC results of the same transformers are used to calculate paper/oil conductivity. Furthermore a discussion on the results of DGA and PDC measurements is presented.
Conference Title
Australasian Universities Power Engineering Conference: integrating renewables into the grid
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Electrical and Electronic Engineering not elsewhere classified
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