Journal
IEEE TRANSACTIONS ON POWER DELIVERY
Volume 27, Issue 3, Pages 1350-1357Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPWRD.2012.2188143
Keywords
Autoassociative neural networks; dissolved gas analysis (DGA); information theoretic learning; mean shift; transformer fault diagnosis
Categories
Funding
- CNPq (Brazil)
- ERDF from the EU
- Portuguese Government through FCT-Foundation for Science and Technology [LASCA PTDC/EEA-EEL/104278/2008, GEMS PTDC/EEA-EEL/105261/2008]
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This paper presents a new approach to incipient fault diagnosis in power transformers, based on the results of dissolved gas analysis. A set of autoassociative neural networks or autoencoders is trained, so that each becomes tuned with a particular fault mode or no fault condition. The scarce data available forms clusters that are densified using an Information Theoretic Mean Shift algorithm, allowing all real data to be used in the validation process. Then, a parallel model is built where the autoencoders compete with one another when a new input vector is entered and the closest recognition is taken as the diagnosis sought. A remarkable accuracy of 100% is achieved with this architecture, in a validation data set using all real information available.
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