Analysis of transformers working under heavily saturated conditions in grid-connected renewable-energy systems

Kefalas, TD; Kladas, AG

dc.contributor.author	Kefalas, TD	en
dc.contributor.author	Kladas, AG	en
dc.date.accessioned	2014-03-01T02:53:33Z
dc.date.available	2014-03-01T02:53:33Z
dc.date.issued	2012	en
dc.identifier.issn	02780046	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/36406
dc.subject	Computer-aided analysis	en
dc.subject	electromagnetic analysis	en
dc.subject	finite element methods	en
dc.subject	magnetic cores	en
dc.subject	magnetostatics	en
dc.subject	Newton method	en
dc.subject	nonlinear magnetics	en
dc.subject	numerical analysis	en
dc.subject	power transformers	en
dc.subject	soft magnetic materials	en
dc.subject.other	Electromagnetic analysis	en
dc.subject.other	Finite Element	en
dc.subject.other	Newton methods	en
dc.subject.other	Nonlinear magnetics	en
dc.subject.other	Soft magnetics	en
dc.subject.other	Computer aided analysis	en
dc.subject.other	Electromagnetic fields	en
dc.subject.other	Finite element method	en
dc.subject.other	Magnetic cores	en
dc.subject.other	Magnetostatics	en
dc.subject.other	Newton-Raphson method	en
dc.subject.other	Numerical analysis	en
dc.subject.other	Power transformers	en
dc.subject.other	Silicon steel	en
dc.subject.other	Soft magnetic materials	en
dc.subject.other	DC transformers	en
dc.title	Analysis of transformers working under heavily saturated conditions in grid-connected renewable-energy systems	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1109/TIE.2011.2161068	en
heal.identifier.secondary	http://dx.doi.org/10.1109/TIE.2011.2161068	en
heal.identifier.secondary	5936721	en
heal.publicationDate	2012	en
heal.abstract	In recent years, researchers have proposed transformerless solutions for connecting renewable-energy power plants to the grid. Apart from lack of efficiency and increased cost and weight of the transformer, one of the reasons is the dc input current that causes transformer saturation. The purpose of this paper is the development of a finite-element computational tool that is going to aid transformer manufacturers in designing distribution transformers specifically for the renewable-energy market. It is based on a generalized macroscopic representation of electrical steels used in the transformer manufacturing industry that enables the accurate evaluation of electromagnetic field distribution of transformer cores under heavily saturated conditions. Its advantages over conventional formulations include numerical stability, numerical accuracy, and reduction of iterations of the Newton-Raphson method. An experimental verification of the proposed method is carried out. © 2006 IEEE.	en
heal.journalName	IEEE Transactions on Industrial Electronics	en
dc.identifier.doi	10.1109/TIE.2011.2161068	en
dc.identifier.volume	59	en
dc.identifier.issue	5	en
dc.identifier.spage	2342	en
dc.identifier.epage	2350	en