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Assessing the use of natural esters for transformer field drying

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dc.affiliation.dptoUC3M. Departamento de Ingeniería Eléctricaes
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Diagnóstico de Máquinas Eléctricas y Materiales Aislantes (DIAMAT)es
dc.contributor.authorVillarroel Rodríguez, Rafael David
dc.contributor.authorGarcía de Burgos, María Belén
dc.contributor.authorGarcía Gómez, Diego Fernando
dc.contributor.authorBurgos Díaz, Juan Carlos
dc.contributor.funderMinisterio de Economía y Competitividad (España)es
dc.contributor.funderMinisterio de Ciencia e Innovación (España)es
dc.date.accessioned2022-11-09T08:55:02Z
dc.date.available2022-11-09T08:55:02Z
dc.date.issued2014-08-01
dc.description.abstractIn recent years, great attention has been paid to ester fluids as an alternative to mineral oil. Since the present use of these liquids is becoming a common practice in distribution transformers, even some experiences have been published reporting their application to power transformers. One of the main differences between ester fluid and mineral oil is the much greater capability of absorbing water by esters. In this paper, the possibility of using this kind of liquid in transformer field drying is assessed. Hot oil (HO) drying with mineral oil is one of the most widely used methods to dry transformers in the field, since it is a relatively simple and well-known process and it is less aggressive for the insulation than other drying methods. Moreover, drying the oil, while it is preferably hot, is the only method available to dry transformers online. However, the water extraction rate of the process is very poor because of the highly hydrophobic character of mineral oil and, in consequence, large drying times are needed to achieve a significant reduction in the water content of the insulation. A first theoretical analysis seems to indicate that the use of a less hydrophobic liquid would significantly reduce the drying times involved in the process. This paper aims to quantify the improvement of the HO drying process that is achieved by using ester fluids instead of mineral oil. Both drying agents were compared by means of theoretical simulations as well as laboratory tests.en
dc.description.sponsorshipThis work has been supported by the Spanish Government by means of the projects DPI2009-07093 and DPI2012-35819.en
dc.format.extent6
dc.identifier.bibliographicCitationIEEE Transactions on Power Delivery, (2014), 29(4), pp.: 1894-1900.en
dc.identifier.doihttps://doi.org/10.1109/TPWRD.2014.2305449
dc.identifier.issn0885-8977
dc.identifier.publicationfirstpage1894
dc.identifier.publicationissue4
dc.identifier.publicationlastpage1900
dc.identifier.publicationtitleIEEE TRANSACTIONS ON POWER DELIVERYen
dc.identifier.publicationvolume29
dc.identifier.urihttps://hdl.handle.net/10016/35986
dc.identifier.uxxiAR/0000015757
dc.language.isoengen
dc.publisherIEEEen
dc.relation.projectIDGobierno de España. DPI2009-07093es
dc.relation.projectIDGobierno de España. DPI2012-35819es
dc.rights© 2014 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission.en
dc.subject.ecienciaIngeniería Industriales
dc.subject.ecienciaMaterialeses
dc.subject.otherDiffusion coefficienten
dc.subject.otherMoisture dynamicsen
dc.subject.otherNatural estersen
dc.subject.otherTransformer loaden
dc.titleAssessing the use of natural esters for transformer field dryingen
dc.typeresearch article*
dc.type.hasVersionAM*
dspace.entity.typePublication
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