Show simple item record

dc.contributor.authorBandara, Kapila
dc.contributor.authorEkanayake, Chandima
dc.contributor.authorSaha, Tapan
dc.date.accessioned2018-01-04T04:01:48Z
dc.date.available2018-01-04T04:01:48Z
dc.date.issued2015
dc.identifier.issn1070-9878
dc.identifier.doi10.1109/TDEI.2015.7076832
dc.identifier.urihttp://hdl.handle.net/10072/173023
dc.description.abstractDielectric polarization based measurements have been used as one of the useful techniques to characterize the quality of transformer oil. Further, understanding the variation in dielectric response of oil is important to accurately interpret the condition of a transformer composite insulation system. In this paper, the behaviour of insulating oil during frequency domain and time domain dielectric response measurements is investigated. A commercially available natural ester and mineral oil are used for this study. Observed dielectric responses have revealed that existing models which have been in use to describe polarization phenomenon in insulating liquids are insufficient to characterize the exact response of oil obtained from frequency and time domain measurements. This paper proposes two new models for characterizing frequency and time domain response of oil based on the charge transport phenomenon at the electrode interface. The phenomenon in frequency and time domain response of oil has been characterized with an equivalent circuit model and mathematical model respectively, which have been deduced by considering electrode polarization effect and diversity of ionic mobility. The proposed models are tested against measured results and then the applicability verified. Correlation between AC conductivity and low frequency dispersion of real permittivity has also been identified in the presented work. This relationship has been explained with a new mathematical model with nearly S- shaped sigmoid growth. Finally, the impact of parasitic phenomenon called Electro Hydro Dynamic (EHD) motion on dielectric response measurement has been investigated. Two mineral oil samples obtained from operational transformers are used to study the influence of EHD motion.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherIEEE - Institute of Electrical and Electronics Engineers
dc.relation.ispartofpagefrom1283
dc.relation.ispartofpageto1291
dc.relation.ispartofissue2
dc.relation.ispartofjournalIEEE Transactions on Dielectrics and Electrical Insulation
dc.relation.ispartofvolume22
dc.subject.fieldofresearchElectrical and Electronic Engineering not elsewhere classified
dc.subject.fieldofresearchElectrical and Electronic Engineering
dc.subject.fieldofresearchcode090699
dc.subject.fieldofresearchcode0906
dc.titleModelling the Dielectric Response Measurements of Transformer Oil
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.hasfulltextNo Full Text
gro.griffith.authorEkanayake, Chandima MB.


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

  • Journal articles
    Contains articles published by Griffith authors in scholarly journals.

Show simple item record