Numerical analysis on magnetic field of HTS transformer with different geometry

Author

Li, Xiaosong ; Chen, Qiaofu ; Hu, Gui ; Sun, Jianbo ; Long, Guzong

Author_Institution

Sch. of Electr. Eng., Huazhong Univ. of Sci. & Technol., Wuhan

Volume

42

Issue

4

fYear

2006

fDate

4/1/2006 12:00:00 AM

Firstpage

1343

Lastpage

1346

Abstract

In a high-temperature superconducting (HTS) transformer leakage magnetic field, especially its radial component, decreases the critical current and increases the ac losses in the tapes. Because of zero resistance of HTS tapes a slight unbalance among the branch inductances of the windings may result in heavy circulating current, however, an accurate calculation of it must depend on the magnetic field analysis. Thus, a numerical analysis of the leakage magnetic field is especially necessary for an HTS transformer design. In this paper the leakage magnetic field of several transformer geometries is studied by finite element method, and based on it, the circulating current distribution is calculated. Some suggestions for improving the leakage field and circulating current distribution are presented to make HTS transformers more efficient

Keywords

current distribution; finite element analysis; high-temperature superconductors; leakage currents; magnetic fields; superconducting tapes; superconducting transformers; HTS tapes; circulating current distribution; finite element analysis; high-temperature superconducting transformer; leakage magnetic field; magnetic field analysis; transformer geometries; Circuit faults; Coils; Finite element methods; Geometry; High temperature superconductors; Magnetic analysis; Magnetic fields; Numerical analysis; Power transformer insulation; Transformer cores; Circulating current; HTS transformer; finite element method (FEM); leakage magnetic field;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2006.870940

Filename

1608463