Analysis of magnetic field and geometry effects for the design of HTS devices for AC power applications

Author

Grilli, Francesco ; Martini, Luciano ; Stavrev, Svetlomir ; Dutoit, Bertrand ; Brambilla, Roberto

Volume

15

Issue

2

fYear

2005

fDate

6/1/2005 12:00:00 AM

Firstpage

2074

Lastpage

2077

Abstract

The performance of HTS devices is strongly influenced by local values of the current and field distributions. In this paper, we investigate the influence of the magnetic field and the geometrical configuration on the loss behavior of a 200 kVA FCL prototype, composed by Bi-2223/Ag tapes wound around a cylindrical support. The investigation is performed by means of finite element computations, with the use of an axisymmetric 2D A-V formulation for taking into account the cylindrical geometry. The electrical behavior of the superconductor is described by means of a B-dependent E-J power-law relation, derived from experimental measurements with a field of different orientation. Several geometrical configurations are analyzed and compared, in order to find the ones with the lowest AC loss.

Keywords

bismuth compounds; calcium compounds; fault current limiters; finite element analysis; high-temperature superconductors; lead compounds; silver; strontium compounds; superconducting tapes; AC loss; AC power applications; B-dependent E-J power-law relation; Bi₂PbSr₂Ca₂Cu₃O₁₀-Ag; FCL prototype; HTS devices; axisymmetric 2D A-V formulation; current distributions; cylindrical geometry; cylindrical support; field distributions; finite element computations; geometry effects analysis; loss behavior; magnetic field analysis; magnetic field distribution; superconductor electrical behavior; Computational geometry; Electric variables measurement; Finite element methods; High temperature superconductors; Magnetic analysis; Magnetic field measurement; Magnetic fields; Prototypes; Superconducting films; Wounds; AC losses; finite element method; high temperature superconductors; magnetic field distribution;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2005.849455

Filename

1440069