Calculation of the short-circuit reactance of transformers by a line integral based on surface magnetic charges

Author

Lu, Jiayu ; Yuan, Jiansheng ; Chen, Li ; Sheng, Jianni ; Ma, Xinshan

Author_Institution

Dept. of Electr. Eng., Tsinghua Univ., Beijing, China

Volume

34

Issue

5

fYear

1998

fDate

9/1/1998 12:00:00 AM

Firstpage

3483

Lastpage

3486

Abstract

An efficient approach for calculating the short-circuit reactance of transformers is presented in this paper. This approach is based on the surface magnetic charge method and the band-ring mesh elements. The area integral in the calculation of the magnetic flux is transformed to a line integral, which can save on computing time and increase the calculation accuracy. The integral transformation results from the idea of the flux decomposition. Furthermore, based on the flux decomposition, a unified formula of calculating the short-circuit reactance of transformers is derived. The calculation of the formula is simplified by employing the band-ring boundary elements in the particular geometrical situation that the cylindrical windings and the elements are coaxial. Calculation examples illustrate that the approach presented in this paper is both efficient and accurate

Keywords

electric reactance; magnetic flux; mesh generation; transformer windings; transformers; band-ring boundary elements; band-ring mesh elements; calculation accuracy; coaxial elements; computing time; cylindrical windings; flux decomposition; integral transformation; line integral; magnetic flux; short-circuit reactance; surface magnetic charge method; surface magnetic charges; transformers; Accuracy; Coaxial components; Equations; Impedance matching; Magnetic circuits; Magnetic fields; Magnetic flux; Magnetic materials; Surface impedance; Transformers;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.717821

Filename

717821