Solutions of three-dimensional multiply connected and open boundary problems by BEM in three-phase combination transformers

Author

Renyuan, Tang ; Junyou, Yang ; Feng, Lin ; Yongping, Lu

Author_Institution

Res. Inst. of Special Electr. Machines, Shenyang Polytech. Univ., China

Volume

28

Issue

2

fYear

1992

fDate

3/1/1992 12:00:00 AM

Firstpage

1340

Lastpage

1343

Abstract

A boundary element method (BEM) in terms of magnetic vector potential and electric scalar potential is successfully applied to three-dimensional, multiply connected, and open boundary problems caused by the heavy current of leads in a three-phase combination transformer. The quasi-frontal method is employed for the solution of the set of equations with asymmetric and full coefficient matrix. At most a quarter of the whole matrix needs to be stored. The numerical results are compared with experimental values and show very good agreement. Corrective measures for reducing the losses and preventing the box from locally overheating are presented

Keywords

boundary-elements methods; boundary-value problems; electromagnetic field theory; matrix algebra; power engineering computing; power transformers; 3D multiply connected problems; asymmetric matrix; boundary element method; electric scalar potential; full coefficient matrix; lead magnetic fields; magnetic vector potential; open boundary problems; quasi-frontal method; three-phase combination transformers; Boundary element methods; Eddy currents; Electric machines; Electric potential; Integral equations; Lead; Magnetic fields; Partial response channels; Permeability; Transformers;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.123939

Filename

123939