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

Tsili, MA; Kladas, AG; Georgilakis, PS; Souflaris, AT; Paparigas, DG

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