Analysis of three-phase transformer no-load characteristics

Author

Baghzouz, Y. ; Gong, X.D.

Author_Institution

Dept. of Electr. & Comput. Eng., Nevada Univ., Las Vegas, NV, USA

Volume

10

Issue

1

fYear

1995

fDate

2/1/1995 12:00:00 AM

Firstpage

18

Lastpage

26

Abstract

The traditional laboratory experiment on three-phase transformer connections consists of a qualitative observation of current and phase voltage waveforms by means of an oscilloscope, with emphasis placed on the dominant third harmonic component. Some recorded waveshapes, however, cannot be explained in simple terms without considering other harmonic components and the quality of power supply. This paper outlines an improved lecture/experiment that quantitatively analyzes the waveforms of various transformer connections under steady-state no-load conditions while taking into account the nonideal voltage supply. The experimental data obtained with the aid of a harmonic analyzer are then compared to the qualitative predictions and the discrepancies are discussed

Keywords

harmonic analysis; power engineering education; power supply quality; power transformers; student experiments; current waveforms; dominant third harmonic component; exciting current; experiment; harmonic analyzer; lecture; neutral current; nonideal voltage supply; phase voltage waveforms; power supply quality; steady-state no-load conditions; three-phase transformer no-load characteristics; transformer connections; Harmonic analysis; Hysteresis; Laboratories; Magnetic analysis; Oscilloscopes; Phase transformers; Power supplies; Power system harmonics; Steady-state; Transformer cores;

fLanguage

English

Journal_Title

Power Systems, IEEE Transactions on

Publisher

ieee

ISSN

0885-8950

Type

jour

DOI

10.1109/59.373923

Filename

373923