Assessing the use of natural esters for transformer field drying

e-Archivo Repository

Show simple item record Villarroel Rodríguez, Rafael David García de Burgos, María Belén García Gómez, Diego Fernando Burgos Díaz, Juan Carlos 2022-11-09T08:55:02Z 2022-11-09T08:55:02Z 2014-08-01
dc.identifier.bibliographicCitation IEEE Transactions on Power Delivery, (2014), 29(4), pp.: 1894-1900.
dc.identifier.issn 0885-8977
dc.description.abstract In 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.
dc.description.sponsorship This work has been supported by the Spanish Government by means of the projects DPI2009-07093 and DPI2012-35819.
dc.format.extent 6
dc.language.iso eng
dc.publisher IEEE
dc.rights © 2014 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission.
dc.subject.other Diffusion coefficient
dc.subject.other Moisture dynamics
dc.subject.other Natural esters
dc.subject.other Transformer load
dc.title Assessing the use of natural esters for transformer field drying
dc.type article
dc.subject.eciencia Ingeniería Industrial
dc.subject.eciencia Materiales
dc.relation.projectID Gobierno de España. DPI2009-07093
dc.relation.projectID Gobierno de España. DPI2012-35819
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 1894
dc.identifier.publicationissue 4
dc.identifier.publicationlastpage 1900
dc.identifier.publicationtitle IEEE TRANSACTIONS ON POWER DELIVERY
dc.identifier.publicationvolume 29
dc.identifier.uxxi AR/0000015757
dc.contributor.funder Ministerio de Economía y Competitividad (España)
dc.contributor.funder Ministerio de Ciencia e Innovación (España)
dc.affiliation.dpto UC3M. Departamento de Ingeniería Eléctrica
dc.affiliation.grupoinv UC3M. Grupo de Investigación: Diagnóstico de Máquinas Eléctricas y Materiales Aislantes (DIAMAT)
 Find Full text

Files in this item

*Click on file's image for preview. (Embargoed files's preview is not supported)

This item appears in the following Collection(s)

Show simple item record