Geometry optimization of magnetic shunts in power transformers based on a particular hybrid finite-element boundary-element model and sensitivity analysis

Author

Tsili, Marina A. ; Kladas, Antonios G. ; Georgilakis, Pavlos S. ; Souflaris, Athanassios T. ; Paparigas, Dimitris G.

Author_Institution

Fac. of Electr. & Comput. Eng., Nat. Tech. Univ. of Athens, Greece

Volume

41

Issue

5

fYear

2005

fDate

5/1/2005 12:00:00 AM

Firstpage

1776

Lastpage

1779

Abstract

In this paper, the influence of magnetic shunt geometry on the transformer leakage field and short-circuit impedance is examined. The magnetic-field computation is conducted with the use of a particular hybrid finite-element method (FEM) boundary-element method (BEM) formulation, facilitating the parametric investigation of magnetic shunt effects through application of appropriate boundary conditions. A design sensitivity analysis for the optimization of the shunt geometry ensuring a desired change in short-circuit impedance and shunt losses has also been developed, in conjunction with the magnetic-field model.

Keywords

boundary-elements methods; computational electromagnetics; finite element analysis; magnetic fields; magnetic leakage; optimisation; power transformers; sensitivity analysis; boundary conditions; boundary-element method; design optimization; design sensitivity analysis; finite-element method; hybrid finite-element boundary-element model; magnetic shunt effects; magnetic shunt geometry; magnetic-field computation; magnetic-field model; power transformers; short-circuit impedance; shunt geometry optimization; shunt losses; transformer leakage field; Design optimization; Finite element methods; Geometry; Impedance; Magnetic shielding; Magnetostatics; Optimization methods; Power transformers; Sensitivity analysis; Solid modeling; Design optimization; finite-element (FEM) boundary-element (BEM) hybrid methods; sensitivity analysis; transformers;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2005.846075

Filename

1430963