DocumentCode :
1347885
Title :
Factors that influence transformer no-load current harmonics
Author :
Al-Haj, Aiman Hassan ; El-Amin, Ibrahim
Author_Institution :
Saudi Transformers Co., Dammam, United Arab Emirates
Volume :
15
Issue :
1
fYear :
2000
fDate :
1/1/2000 12:00:00 AM
Firstpage :
163
Lastpage :
166
Abstract :
The harmonic components of the no-load current are influenced by many factors. These factors are the flux density, the degree of saturation and the core stacking technique. This paper tested many transformers for the no-load current and its harmonic components. A slight over-excitation results in a substantial increase of the THD level. The increase in the THD is not linear with the flux density. Also this work has demonstrated that having a lower no-load current should not be an indication of lower harmonics. The simulation of the transformer through the use of nonlinear inductors and resistors provided reasonable accuracy
Keywords :
harmonic distortion; harmonics; magnetic flux; power transformers; transformer cores; THD level increase; core stacking technique; flux density; harmonic components; lower harmonics; no-load current; nonlinear inductors; over-excitation; resistors; transformer no-load current harmonics; Circuit faults; Current measurement; Current transformers; IEC standards; Magnetic cores; Magnetic materials; Petroleum; Stacking; Testing; Transformer cores;
fLanguage :
English
Journal_Title :
Power Delivery, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-8977
Type :
jour
DOI :
10.1109/61.847245
Filename :
847245
Link To Document :
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