Simulação digital do comportamento das correntes elétricas em um transformador submetido a cargas bruscas: estudo de casos.

Abstract

In this work, we developed a software in Windows environment, version 6.5 FORTRAN to simulate the transient behavior of electric current in single-phase transformer subjected to short-circuit and the application of purely resistive loads, inductive and capacitive in the secondary transformer, besides the application a source of alternating voltage and another constant in the input terminal of the transformer, so that the necessary tests were done to our study in this work. We performed digital simulation in two single- phase transformers, with a core of iron-silicon alloy and the other with the core of amorphous alloy, subjecting them to different signs of tension in the primary and the electrical charges of different nature in its secondary circuit, and thus make analysis of the behavior of single phase transformers in transient state. The parameters of single-phase transformer core of ferro-silicon, which served as the basis for digital simulation were obtained experimentally in the Laboratory of Electrical Machines UFCG Block (CH), while the parameters for the transformer amorphous alloy were obtained in the literature specialized2.