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Shielding effect of power transformers tanks in the ultra-high-frequency detection of partial discharges

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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.authorRobles Muñoz, Guillermo
dc.contributor.authorAlbarracín Sánchez, Ricardo
dc.contributor.authorMartínez Tarifa, Juan Manuel
dc.date.accessioned2013-06-20T11:30:55Z
dc.date.available2013-06-20T11:30:55Z
dc.date.issued2013-04
dc.description.abstractPartial discharges (PD) measurement is a well-known technique for judgment of the condition of power transformer offline. Phase-resolved PD measurement is a normalized technique for PD tests, but noise, especially by PD-measurements onsite is sometimes difficult to reject, and a post-processing of a pattern is necessary to separate different sources. Higher-frequency-detection devices and processing strategies are useful for PD classification and identification. Recently, ultra-high-frequency (UHF) detection by means of antennas has been shown to be a promising detection system for both offline and online PD-measurements. However, it is necessary to assess whether PD source separation and classification is possible by means of pulse analysis because some additional UHF noise sources are coupled to the detected signals, and it is not clear whether different sources produce different pulses. In this study, the attenuation effect of the metallic tank of a power transformer on the inner PD activity when measured outside the tank was studied. Additionally, experiments were conducted to detect and characterize two different PD sources (internal and external discharges) using two antennas measuring the same phenomenon inside and outside of a transformer. It will also be shown that broadband UHF signals are useful for PD recognition and that a deep study of frequencies below 500 MHz can separate PD occurring inside from those occurring outside when measured with an antenna outside the tank.
dc.description.sponsorshipThis research has been supported by the Spanish Science and Technology Ministry under contract DPI 2009-14628- C03-02 and by the Madrid Regional Government and Universidad Carlos III de Madrid under contract CCG10- UC3M/DPI-4627. Tests have been made in the High Voltage Research and Tests Laboratory of Universidad Carlos III de Madrid (LINEALT).
dc.description.status
dc.description.statusPublicadoes
dc.format.extent7
dc.format.mimetypeapplication/pdf
dc.identifier.bibliographicCitationIEEE Transactions on dielectrics and electrical insulation, 2013, 20(2), 678-684.
dc.identifier.doi10.1109/TDEI.2013.6508772
dc.identifier.issn1070-9878
dc.identifier.publicationfirstpage678
dc.identifier.publicationissue2
dc.identifier.publicationlastpage684
dc.identifier.publicationtitleIEEE Transactions on dielectrics and electrical insulation
dc.identifier.publicationvolume20
dc.identifier.urihttps://hdl.handle.net/10016/17157
dc.identifier.uxxiAR/0000013247
dc.language.isoeng
dc.publisherIEEE
dc.relation.publisherversionhttp://dx.doi.org/10.1109/TDEI.2013.6508772
dc.rights© IEEE
dc.rights.accessRightsopen access
dc.subject.ecienciaIngeniería Industrial
dc.subject.ecienciaMateriales
dc.subject.otherUHF antennas
dc.subject.otherUHF measurement
dc.subject.otherPartial discharge measurement
dc.subject.otherPower transformers
dc.subject.otherShielding
dc.titleShielding effect of power transformers tanks in the ultra-high-frequency detection of partial discharges
dc.typeresearch article*
dc.type.hasVersionAM*
dspace.entity.typePublication
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