Eddy current fields and overheating problems due to heavy current carrying conductors

Author

Junyou, Yang ; Renyuan, Tang ; Yan, Li ; Yongbin, Chen

Author_Institution

Shenyang Polytech. Univ., China

Volume

30

Issue

5

fYear

1994

fDate

9/1/1994 12:00:00 AM

Firstpage

3064

Lastpage

3067

Abstract

Large complex problems, eddy current fields and local overheating due to heavy current carrying conductors (HCCC) including leads and connecting bus bars in a 360 MVA/500 kV power transformer, are analyzed by the boundary element method. To improve numerical accuracy, this paper chooses triangle polar coordinate mapping and addition-substraction techniques to evaluate singular integrals. The distributions of magnetic flux and eddy current densities in metallic parts of different materials are discussed. According to the criterion of overheating, permissible lead current and limiting distance between HCCC and metallic parts and arrangements of HCCC are suggested

Keywords

boundary-elements methods; busbars; conductors (electric); eddy currents; power transformers; 360 MVA; 500 kV; addition-substraction techniques; boundary element method; connecting bus bars; eddy current fields; heavy current carrying conductors; large complex problems; lead current; limiting distance; local overheating; magnetic flux distributions; metallic parts; numerical accuracy; power transformer; singular integrals; triangle polar coordinate mapping; Bars; Boundary element methods; Conductors; Eddy currents; Joining processes; Lead; Magnetic analysis; Magnetic flux; Magnetic materials; Power transformers;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.312584

Filename

312584