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Advanced design methodology for single and dual voltage wound core power transformers based on a particular finite element model

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dc.contributor.author Tsili, MA en
dc.contributor.author Kladas, AG en
dc.contributor.author Georgilakis, PS en
dc.contributor.author Souflaris, AT en
dc.contributor.author Paparigas, DG en
dc.date.accessioned 2014-03-01T01:23:33Z
dc.date.available 2014-03-01T01:23:33Z
dc.date.issued 2006 en
dc.identifier.issn 0378-7796 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/17013
dc.subject Dual voltage en
dc.subject Finite element method en
dc.subject Power transformers en
dc.subject Short-circuit impedance en
dc.subject Transformer windings en
dc.subject.classification Engineering, Electrical & Electronic en
dc.subject.other Computation theory en
dc.subject.other Electric impedance en
dc.subject.other Electric potential en
dc.subject.other Electric windings en
dc.subject.other Finite element method en
dc.subject.other Mathematical models en
dc.subject.other Short circuit currents en
dc.subject.other Computational tool en
dc.subject.other Dual voltage en
dc.subject.other Short-circuit impedance en
dc.subject.other Winding cooling ducts en
dc.subject.other Electric transformers en
dc.title Advanced design methodology for single and dual voltage wound core power transformers based on a particular finite element model en
heal.type journalArticle en
heal.identifier.primary 10.1016/j.epsr.2005.09.019 en
heal.identifier.secondary http://dx.doi.org/10.1016/j.epsr.2005.09.019 en
heal.language English en
heal.publicationDate 2006 en
heal.abstract The paper presents an accurate and cost effective three-dimensional finite element model for the analysis and design of wound core, shell type, power transformers, focusing on the short-circuit impedance evaluation. The model efficiency lies on the detailed representation of the transformer geometry along with the adoption of a particular reduced scalar potential formulation enabling three-dimensional magnetostatic problem solution without prior source field calculation. Its accuracy is validated through local field measurements and through comparison of the calculated short-circuit impedance value with the measured one for several commercial wound core, shell type transformers. In such transformers, involving extensive winding parts out of the core window, the detailed representation of the transformer geometry, including the winding cooling ducts, provides accurate results for low densities of the three-dimensional finite element mesh, resulting to reduction of the required calculation time. The model is used in the development of a computational tool, which enables the automated and accurate transformer characteristics prediction, adopted to the manufacturing process. This tool has also been applied in the impedance calculation for different winding connections of dual voltage transformers, thus providing the information needed for the achievement of an accurate design and the enhancement of the manufacturer's ability to reduce design margins. The methodology presented in this paper has been incorporated in the design process of a transformer manufacturing industry. (C) 2005 Elsevier B.V. All rights reserved. en
heal.publisher ELSEVIER SCIENCE SA en
heal.journalName Electric Power Systems Research en
dc.identifier.doi 10.1016/j.epsr.2005.09.019 en
dc.identifier.isi ISI:000237186100005 en
dc.identifier.volume 76 en
dc.identifier.issue 9-10 en
dc.identifier.spage 729 en
dc.identifier.epage 741 en


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