Chaos in Power Transformers Including the Core Hysteresis

S.H. Fathi, M. Rostami, M. Abedi, and C. Lucas (Iran)


Chaos, Power Transformer, Hysteresis


This paper presents the study of chaos in power transformers, including hysteresis effect in the core. In previous studies, [1,2,3], the hysteresis effect was not considered and the magnetic characteristics of the core were represented by polynomials. Since hysteresis causes loss of energy in a transformer and usually is represented by a resistor in the equivalent circuit, it seems to have a damping effect against any oscillation in the system. Furthermore, hysteresis plays more complicated role in system behavior by increasing non-linearity of the system. This can be illustrated by comparison between the simulation results of both cases (with and without hysteresis ) considering various system parameters.

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