Numerical Analysis of Eddy Current Field in the Ascending Flange for the Bushings and Tank Wall of a Large Transformer

Author

Li, Y. ; Ho, S.L. ; Wang, N. ; Tang, R.Y.

Author_Institution

Res. Inst. of Special Electr. Machines, Shenyang Univ. of Technol., Shenyang

fYear

2008

fDate

12-15 Oct. 2008

Firstpage

1

Lastpage

5

Abstract

The three-dimensional (3D) open boundary eddy current field induced by heavy current flowing in the coils and winding leads in large power transformers is calculated. The eddy current loss and local overheating problem in the tank wall and in the ascending flange of bushings are analyzed and reported in this paper. The effectiveness of a magnetic by-pass plate near the coil ends for reducing the eddy current loss and local overheating in the clamp plates is discussed.

Keywords

eddy current losses; eddy currents; transformers; 3D open boundary eddy current field; ascending flange; bushings; clamp plates; eddy current loss; large transformer; local overheating; magnetic by pass plate; numerical analysis; tank wall; Boundary conditions; Clamps; Coils; Eddy currents; Equations; Flanges; Insulators; Magnetic field measurement; Numerical analysis; Power transformers; Eddy current field; Loss; Power transformer;

fLanguage

English

Publisher

ieee

Conference_Titel

Power System Technology and IEEE Power India Conference, 2008. POWERCON 2008. Joint International Conference on

Conference_Location

New Delhi

Print_ISBN

978-1-4244-1763-6

Electronic_ISBN

978-1-4244-1762-9

Type

conf

DOI

10.1109/ICPST.2008.4745377

Filename

4745377