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Comparative study of the degradation rate of new and regenerated mineral oils following electrical stress

Oumert L. Safiddine, Boucherit Ahmed, Zafour Amel Hadj-Ziane et Fofana Issouf. (2018). Comparative study of the degradation rate of new and regenerated mineral oils following electrical stress. IET Generation, Transmission and Distribution, 12, (21), p. 5891-5897.

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URL officielle: https://doi.org/10.1049/iet-gtd.2018.6077

Résumé

The objective of this contribution was to study the behaviour of new and regenerated insulating oil used in power transformers under the influence of an electric stress. To estimate the degradation rate of the dielectric fluids, one thousand (1000) successive breakdowns were generated according to the IEC 60156 standard. The parameters such as dissipation factor (Tan õ), resistivity, total acid number (TAN) and oil water Content were measured and examined following IEC/ISO standards. Good correlations have been obtained between TAN/resistivity and Tan õ which might provide a “picture” of the fluid condition. The dissolved oxidation products for the two dielectric fluids (after the application of electric breakdowns), was evaluated by infrared spectroscopy (FT-IR). The results obtained indicate that the degradation of the parameters is significant and confirms the influence of an alternative electric field (AC) on the new and regenerated oils. It was also suspected that inhibitors and antioxidants were removed from the oil after regeneration. Their concentration should therefore be monitored and replenished when necessary.

Type de document:Article publié dans une revue avec comité d'évaluation
Volume:12
Numéro:21
Pages:p. 5891-5897
Version évaluée par les pairs:Oui
Date:2018
Sujets:Sciences naturelles et génie > Génie > Génie électrique et génie électronique
Département, module, service et unité de recherche:Départements et modules > Département des sciences appliquées
Déposé le:05 juin 2019 15:40
Dernière modification:05 juin 2019 15:40
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