Resumo

PEREZ ABRIL, Ignacio. Modeling in phase-coordinates of the single-phase transformer with center tap in the secondary winding. Energética [online]. 2013, vol.34, n.3, pp.186-197. ISSN 1815-5901.

There exists a model in the literature to representing the single-phase transformer with center tap in the secondary winding. However, this model represents all the impedance of the transformer in the secondary winding, which differs from practice. The distribution of the impedance between primary and the both sections of the secondary winding has a great influence over the magnitude of the short circuit current from a phase to the center tap. This current is much greater than the phase to phase short circuit current in transformers with interlaced windings. The present paper develops a model in phase coordinates for the single-phase transformer with center tap in the secondary winding. The developed model is tested with several examples that shown the convenience of the use of the presented model to analyze the unequal load in both sections of the secondary or the short circuit from a phase to the center tap of the secondary.

Palavras-chave : distribution circuits; phase-coordinates; transformers.

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