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A Novel Test Method for Real-time Magnetic Flux Measurement of Power TransformersZHANG, Y.   , DAI, D. , ZHANG, J. , LIU, X. , CHEN, X. |
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Author keywords
magnetic circuits, power transformers, empirical mode decomposition, test equipment, finite element analysis
References keywords
transformer(16), power(14), bias(12), magnetic(10), electronics(5), current(5), voltage(4), systems(4), study(4), monitoring(4)
Blue keywords are present in both the references section and the paper title.
About this article
Date of Publication: 2019-11-30
Volume 19, Issue 4, Year 2019, On page(s): 29 - 36
ISSN: 1582-7445, e-ISSN: 1844-7600
Digital Object Identifier: 10.4316/AECE.2019.04004
Web of Science Accession Number: 000500274700004
SCOPUS ID: 85077272740
Abstract
Optimizing magnetic flux distribution in iron cores is very important in the transformer design. It can affect whether the iron cores of transformers are saturated or not in severe conditions. If saturated, the transformer will overheat and generate harmful harmonics to the grid. The measurement of the dynamic magnetic flux is an effective method to observe the behavior of transformers and ensure their safety. However, there are limited methods to measure the magnetic flux in real-time. In this paper, a novel test method based on a special transformer design is proposed. The new design integrates an additional bypass iron core which shares a partial magnetic path with the main core. By injecting high-frequency signals into the attached coil of the bypass core, the measured signals reflect the trend of the magnetic flux variation in the main core over time. To improve the accuracy of the derived measured data, the Empirical Mode Decomposition algorithm is also used to diminish the noise without additional designs in the signal acquisition circuit. The proposed method is modeled and tested, and the results show that this method can dynamically measure the magnetic flux in the transformer. |
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Faculty of Electrical Engineering and Computer Science
Stefan cel Mare University of Suceava, Romania
All rights reserved: Advances in Electrical and Computer Engineering is a registered trademark of the Stefan cel Mare University of Suceava. No part of this publication may be reproduced, stored in a retrieval system, photocopied, recorded or archived, without the written permission from the Editor. When authors submit their papers for publication, they agree that the copyright for their article be transferred to the Faculty of Electrical Engineering and Computer Science, Stefan cel Mare University of Suceava, Romania, if and only if the articles are accepted for publication. The copyright covers the exclusive rights to reproduce and distribute the article, including reprints and translations.
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Disclaimer: Whilst every effort is made by the publishers and editorial board to see that no inaccurate or misleading data, opinions or statements appear in this journal, they wish to make it clear that all information and opinions formulated in the articles, as well as linguistic accuracy, are the sole responsibility of the author.
