Identification of Short Circuits and Surges in the Magnetization Current of a Transformer from Local Components of Observed Currents and Voltages

This article involves a search for the features characteristic of each of the possible types of internal short circuits (SC) in a transformer, as well as for a specific nonemergency regime — a surge in the magnetizing current, which is difficult to distinguish from an internal short circuit. The inf...

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Bibliographic Details
Published in:Power technology and engineering 2023-07, Vol.57 (2), p.314-320
Main Authors: Kochetov, I. D., Liamets, Yu.Ya
Format: Article
Language:English
Subjects:
Damage
Electrical Machines and Networks
Energy
Energy Systems
Foundations
Geoengineering
Hydraulics
Power Electronics
Renewable and Green Energy
Short circuits
Transformers
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Description
Summary:This article involves a search for the features characteristic of each of the possible types of internal short circuits (SC) in a transformer, as well as for a specific nonemergency regime — a surge in the magnetizing current, which is difficult to distinguish from an internal short circuit. The information basis for identifying a short circuit consists of ongoing information in the form of observed currents and voltages, as well as a priori information on the transformer contained in its model. Completeness of the information base makes it possible to distinguish virtual components activated on shunted or broken inputs of the transformer model by a source of internal damage or a surge source of magnetizing current from observed quantities. A direct connection with damage or a surge helps to identify them.
ISSN:1570-145X
1570-1468
DOI:10.1007/s10749-023-01662-1