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Potential of determining moisture content in mineral insulating oil by fourier transform infrared spectroscopy

Hadjadj Yazid, Fofana Issouf, van de Voort F. R. et Bussières Denis. (2016). Potential of determining moisture content in mineral insulating oil by fourier transform infrared spectroscopy. IEEE Electrical Insulation Magazine, 32, (1), p. 34-39.

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URL officielle: http://dx.doi.org/10.1109/MEI.2016.7361102

Résumé

Transformer oils are vulnerable to moisture, which can have adverse effects including a dramatic reduction in dielectric strength, accelerating the aging of the solid insulation (cellulose depolymerization) and the formation of decompositional gasses at high temperatures. Moisture may be generated inside the transformer due to degradation of the oil-paper insulation or there may be ingress of moisture due to free-breathing arrangements. A moisture content exceeding 50% of oil saturation greatly reduces the breakdown voltage, resulting in catastrophic failures as well as the potential for transformer fires [1]. The detrimental effect of water within a transformer is not only limited to the breakdown voltage of the oil. The rate of degradation of paper insulation increases in direct proportion to the water content [2], [3]. Moisture also has a decisive effect on the maximum temperature that the transformer can run at before moisture-induced failure occurs. Consequently, transformer life expectancy can be calculated from water content and temperature [3]. A failure of transformer accessories such as condenser bushings sometimes leads to a transformer failure and long-term outage. Often, moisture is a cause of explosion for service-aged bushings.

Type de document:Article publié dans une revue sans comité d'évaluation
Volume:32
Numéro:1
Pages:p. 34-39
Date:Février 2016
Sujets:Sciences naturelles et génie > Génie > Génie des matériaux et génie métallurgique
Département, module, service et unité de recherche:Départements et modules > Département des sciences appliquées > Module d'ingénierie
Mots-clés:mineral transformer oil, FTIR spectroscopy, acetonitrile, water content, moisture, Karl Fisher test, huile minérale de transformateur, spectroscopie FTIR, acétonitrile, teneur en eau, humidité, test de Karl Fisher
Déposé le:12 févr. 2020 23:28
Dernière modification:12 févr. 2020 23:28
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