Finite Element Analysis of Three-Phase Three-Limb Power Transformers Under DC Bias

Author

Biro, O. ; Koczka, Gergely ; Leber, Gerald ; Preis, Kurt ; Wagner, Bernardo

Author_Institution

Inst. for Fundamentals & Theor. in Electr. Eng., Graz Univ. of Technol., Graz, Austria

Volume

50

Issue

2

fYear

2014

fDate

Feb. 2014

Firstpage

565

Lastpage

568

Abstract

A finite element method for the analysis of three-phase, three-limb power transformers under dc bias is presented. The phase voltages and the dc components of the phase currents are assumed to be given. Using parallel algorithms, the steady-state periodic solution is obtained without stepping through the transients using a fixed-point method to solve the nonlinear equations. A novel technique to obtain the starting solution for the fixed-point iterations to ensure fast convergence is introduced. The solution to a large, real world problem is presented.

Keywords

DC transformers; finite element analysis; iterative methods; nonlinear equations; power transformers; DC bias; finite element analysis; fixed-point iteration method; nonlinear equation; parallel algorithm; phase current; steady-state periodic solution; three-phase three-limb power transformer; Bars; Circuit faults; Eddy currents; Magnetic domains; Magnetic noise; Power transformers; Windings; Finite element analysis; nonlinear equations; parallel algorithms; power transformers; stationary state;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2013.2285239

Filename

6749259