Reduction of power grid losses by using energy efficient distribution transformers

Kefalas, TD; Kladas, AG

dc.contributor.author	Kefalas, TD	en
dc.contributor.author	Kladas, AG	en
dc.date.accessioned	2014-03-01T02:54:00Z
dc.date.available	2014-03-01T02:54:00Z
dc.date.issued	2012	en
dc.identifier.issn	02555476	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/36529
dc.subject	Computer aided analysis	en
dc.subject	Finite element methods	en
dc.subject	Magnetic cores	en
dc.subject	Nonlinear magnetics	en
dc.subject	Numerical analysis	en
dc.subject	Power transformers	en
dc.subject.other	Distribution transformer	en
dc.subject.other	Electric energy cost	en
dc.subject.other	Electrical grids	en
dc.subject.other	Energy efficient	en
dc.subject.other	European union	en
dc.subject.other	Harmonic loss	en
dc.subject.other	No-load loss	en
dc.subject.other	Nonlinear magnetics	en
dc.subject.other	Numerical methodologies	en
dc.subject.other	Power grids	en
dc.subject.other	Transmission and distribution	en
dc.subject.other	Wound core	en
dc.subject.other	Computer aided analysis	en
dc.subject.other	Electromagnetism	en
dc.subject.other	Energy efficiency	en
dc.subject.other	Finite element method	en
dc.subject.other	Magnetic cores	en
dc.subject.other	Magnetic materials	en
dc.subject.other	Numerical analysis	en
dc.subject.other	Power transformers	en
dc.subject.other	Superconducting materials	en
dc.subject.other	Superconductivity	en
dc.subject.other	Electric load loss	en
dc.title	Reduction of power grid losses by using energy efficient distribution transformers	en
heal.type	conferenceItem	en
heal.identifier.primary	10.4028/www.scientific.net/MSF.721.269	en
heal.identifier.secondary	http://dx.doi.org/10.4028/www.scientific.net/MSF.721.269	en
heal.publicationDate	2012	en
heal.abstract	The importance of distribution transformer no-load loss on the operation of modern electrical grids is often underestimated. Internationally, distribution transformer no-load loss constitutes nearly 25% of the transmission and distribution losses of electrical grids. The losses in European Union distribution transformers are estimated at about 33 TWh/year whereas, reactive power and harmonic losses add a further 5 TWh/year. In the Greek electrical grid the no-load losses of 140,000 distribution transformers are estimated at about 490 GWh/year. This paper has two goals the first one is to illustrate the significance of distribution transformer no-load loss in periods of high electric energy cost and the second goal is the presentation of a novel numerical methodology for wound core transformers no-load loss analysis, enabling to determine the economically and technically optimum transformer for every use. © (2012) Trans Tech Publications.	en
heal.journalName	Materials Science Forum	en
dc.identifier.doi	10.4028/www.scientific.net/MSF.721.269	en
dc.identifier.volume	721	en
dc.identifier.spage	269	en
dc.identifier.epage	274	en