IMPACT OF REMANENT MAGNETIZATION IN THE AREA OF DISTRIBUTION TRANSFORMERS DIAGNOSTIC BY SFRA METHOD

The paper deals with the influence of core magnetization on its frequency response analysis. Remanent magnetization is a characteristic property of ferromagnetic materials. The core cans acquire different value of remanent magnetization in the process of diagnostic measurements. This fact is very im...

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Bibliographic Details
Published in:Acta Technica Corvininesis 2013-01, Vol.6 (1), p.43
Main Authors: Sedlák, Jozef, Brandt, Martin, Seewald, Róbert
Format: Article
Language:English
Subjects:
Influence
Magnetic fields
Magnetism
Theory
Online Access:Get full text
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Summary:The paper deals with the influence of core magnetization on its frequency response analysis. Remanent magnetization is a characteristic property of ferromagnetic materials. The core cans acquire different value of remanent magnetization in the process of diagnostic measurements. This fact is very important from the point of view of good representation of results from measurements. In the past, we made a couple of measurements on 3-phase dry transformer (3000VA). Nowadays, we had the possibility to measured 25MVA distribution transformer by SFRA method. This transformer has been connected in the network before the measurement and we have also results of measurements they were done one year before. That time the transformer was out of the operation for 9 months, so we have an anticipation to see some differences. [PUBLICATION ABSTRACT]
ISSN:2067-3809