Resumo

CRESPO SANCHEZ, Gustavo. Dissolved gas analysis for monitoring and power transformers in service diagnosis. Energética [online]. 2015, vol.36, n.2, pp.180-189. ISSN 1815-5901.

The first sign of the existence of problems in power transformers is the detection of gases generated in oil as a result of thermal and electrical stresses that are permanently subject, which degrade the insulation and cause incipient failures which if not detected in time can become costly and larger faults. The article deals with the analysis of these gases as one of the most used methods for the diagnosis of faults in correspondence with the individual concentrations and the relationships between those concentrations that allow determining the status of the transformer and reduce failure rates. A complete tour of the gases and the possible associated diagnoses with them is done. Presents results of the application of this technique in Building Company of Electrical Industry (BCEI) Cienfuegos, from the measurements obtained with the portable meter Transport X (KELMAN LTD).

Palavras-chave : dissolved gas analysis; transformer diagnosis; incipient failures; monitoring; methods for the diagnosis of faults.

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