A new current transformer model

This paper presents a current transformer model that is useful on low frequency applications. To describe the iron core magnetic behaviour of the iron core, a hysteresis model is proposed, which is able to generate minor asymmetric loops and remanent flux. The effects of classic eddy current losses...

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Bibliographic Details
Published in:Controle & automação : revista da Sociedade Brasileira de Automática 2005-09, Vol.16 (3), p.382-389, Article 382
Main Authors: Guerra, Francisco das Chagas Fernandes, Mota, Wellington Santos
Format: Article
Language:English
Subjects:
AUTOMATION & CONTROL SYSTEMS
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Summary:This paper presents a current transformer model that is useful on low frequency applications. To describe the iron core magnetic behaviour of the iron core, a hysteresis model is proposed, which is able to generate minor asymmetric loops and remanent flux. The effects of classic eddy current losses and anomalous losses are represented by linear and nonlinear resistors, respectively. The obtained results are compared with those calculated by Preisach's model and measured in laboratory. This model may be applied in power system protection studies, as it is the case of numeric correction of distorted secondary currents in current transformers (CT's).
ISSN:0103-1759
0103-1759
DOI:10.1590/S0103-17592005000300010