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Multi-scale computations of parameters of transformer windings at high frequencies. Part I

Alexander Polotsev ; Nilanga Abeywickrama (Institutionen för material- och tillverkningsteknik, Högspänningsteknik) ; Yuriy Serdyuk (Institutionen för material- och tillverkningsteknik, Högspänningsteknik) ; Stanislaw Gubanski (Institutionen för material- och tillverkningsteknik, Högspänningsteknik)
IEEE Transactions on Magnetics (0018-9464). Vol. 43 (2007), 11, p. 3991 - 3998.
[Artikel, refereegranskad vetenskaplig]

A hierarchical multi-scale approach to modeling of high frequency phenomena in power transformers is proposed. The method is based on considering high frequency effects on two spatial levels. Part I of the paper focuses on a small-scale level where eddy current as well as geometrical and proximity effects in conductors of transformer windings are examined. The developed computer model accounts for anisotropic frequency-dependent effective diamagnetic properties of transformer windings, which are represented as composite media with periodic structure. Effective characteristics of the laminated transformer core are calculated taking into account anisotropic magnetic properties of steel sheets. The obtained frequency-dependent parameters of transformer elements are further used in Part II for computing effective inductances and resistances of windings and integral losses on a large-scale level, i.e. for the whole transformer.

Nyckelord: Eddy current, effective diamagnetic properties, finite element method, frequency-dependent parameters, multi-scale analysis, proximity effect, power transformer windings.



Denna post skapades 2007-11-06. Senast ändrad 2015-02-11.
CPL Pubid: 61159

 

Institutioner (Chalmers)

Institutionen för material- och tillverkningsteknik, Högspänningsteknik

Ämnesområden

Elkraftteknik

Chalmers infrastruktur