Three-phase, three-limb, steady-state transformer model

Oliveira, L. M. R.; Cardoso, A. J. Marques

http://hdl.handle.net/10400.1/104

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Authors

Oliveira, L. M. R.

Cardoso, A. J. Marques

Abstract(s)

This paper presents the development and implementation of a digital simulation model of a threephase, three-leg, three-winding power transformer. The proposed model, implemented in MATLAB environment, is based on the simultaneous analysis of both magnetic and electric lumped-parameters equivalents circuits, and it is intended to study its adequacy to incorporate, at a later stage, the influences of the occurrence of windings interturn short-circuit faults. Both simulation and laboratory tests results, obtained so far, for a three-phase, 6 kVA transformer, demonstrate the adequacy of the model under normal operating conditions.