Investigation of magnetizing inrush current in a single-phase transformer

Author

Ling, Paul C Y ; Basak, Amitava

Author_Institution

Wolfson Centre for Magnetics Technol., Cardiff, UK

Volume

24

Issue

6

fYear

1988

fDate

11/1/1988 12:00:00 AM

Firstpage

3217

Lastpage

3222

Abstract

The magnetizing inrush current which occurs at the time of energization of a transformer is due to temporary overfluxing in the transformer core. Its magnitude mainly depends on switching parameters. A system for measuring the inrush current is described. The system is also capable of presetting various combinations of switching parameters for energizing of a transformer. Data sampling of the magnetizing inrush current has been achieved by using a microcomputer, and a software package has been developed to perform harmonic analysis of each of the first few transient current cycles. The effects of the remanent flux density, the switching angle, and the primary winding resistance on the magnetizing inrush current of a 2.5-kVA single-phase transformer are presented

Keywords

electric current measurement; magnetic cores; microcomputer applications; power engineering computing; power transformers; software packages; 2.5 kVA; energization; harmonic analysis; magnetizing inrush current; overfluxing; primary winding resistance; remanent flux density; single-phase transformer; software package; switching angle; switching parameters; transformer core; transient current cycles; Current measurement; Harmonic analysis; Magnetic flux; Magnetic switching; Microcomputers; Sampling methods; Software packages; Surges; Transformer cores; Transient analysis;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.92380

Filename

92380