Uma Proposta para Aperfeiçoar a Exatidão de Transformadores de Corrente (A Proposal for Improving the Current Transformers Accuracy)

Leonardo Telino Meneses (telino@ifpb.edu.br)1, André Laurindo Maitelli (maitelli@dca.ufrn.br)2


1Instituto Federal de Educação, Ciência e Tecnologia da Paraíba - IFPB
2Universidade Federal do Rio Grande do Norte

This paper appears in: Revista IEEE América Latina

Publication Date: Feb. 2016
Volume: 14,   Issue: 2 
ISSN: 1548-0992


Abstract:
The paper presents a proposal for improving the current transformers accuracy. The circuit model reported to the secondary, the fasorial diagram and the mathematical formulation lead us to identify that the problem happens because of the excitation current. The research then works to reduce the voltage drops on the secondary circuit by producing this voltage through a control circuit with analog circuits, and this way to reduce the ratio and angle errors.

Index Terms:
current transformer, electricity metering, improvement of accuracy, operational amplifiers.   


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