A network model of the three-phase transformer is developed which takes into account the hysteresis properties of the electrical sheets. Existing hysteresis models (Jiles Atherton and Preisach) are extended in such a way that transient switch-on and switch-off processes can be calculated precisely. Subsequently, the network model is extended by applying the harmonic balancing method in such a way that harmonic simulations can be carried out, taking hysteresis into account. This enables the simulation of the steady state and thus the determination of the transformer losses for different operating points.
|Effective start/end date||1/10/20 → 30/09/21|