Severe saturation of the magnetic core is the most influential factor in ferroresonance that leads to distorted currents and voltages. , modeling the nonlinear behavior of the magnetic core is the most important challenge in ferroresonance study. In this paper, finite e More
Severe saturation of the magnetic core is the most influential factor in ferroresonance that leads to distorted currents and voltages. , modeling the nonlinear behavior of the magnetic core is the most important challenge in ferroresonance study. In this paper, finite element method in conjunction with the inverse Jiles-Atherton (JA) hysteresis model of the steel core, is employed for modeling of a single-phase transformer accurately. Then, ferroresonance is studied by inserting different capacitors in series with the unloaded transformer, and the corresponding variation of copper losses and iron losses are obtained and discussed. Ferroresonance affects the shape of the hysteresis loop that necessitates the retuning of the parameters of the JA hysteresis model. The numerical results agree well with the experimental ones.
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