An improved method for the inrush current evaluation in single phase power transformers

Author

Cazacu, Emil ; Ionita, Valentin ; Petrescu, Lucian

Author_Institution

Electr. Eng. Dept., Univ. Politeh. of Bucharest, Bucharest, Romania

fYear

2013

fDate

23-25 May 2013

Firstpage

1

Lastpage

6

Abstract

The paper presents an automatic procedure for quantitative evaluation of energizing inrush current of a specific range of single phase power transformers: 1.2-25 kVA. Starting from transformer main rated data and core magnetic H-B characterization, the first peak value of inrush current is accurately estimated. Additionally, the harmonic content of its waveform is also investigated offering valuable indicators of this transient phenomenon. The predetermination of the main inrush current characteristics becomes very useful in avoiding its countless undesirable effects on both the transformer and the installation where the device operates. The proposed method offers a fast and flexible solution of the energizing inrush current problem for the main general purpose single phase transformers.

Keywords

harmonics; power transformers; apparent power 1.2 kVA to 25 kVA; core magnetic H-B characterization; harmonic waveform content; inrush current characteristics; inrush current evaluation; single phase power transformers; single phase transformers; transient phenomenon; Circuit faults; Integrated circuits; Phase transformers; Power transformers; Surges; Transformer cores; inrush current; saturation; transformer modeling;

fLanguage

English

Publisher

ieee

Conference_Titel

Advanced Topics in Electrical Engineering (ATEE), 2013 8th International Symposium on

Conference_Location

Bucharest

Print_ISBN

978-1-4673-5979-5

Type

conf

DOI

10.1109/ATEE.2013.6563390

Filename

6563390