Regarding the importance of short circuit and inrush current simulations in the split-winding transformer, a novel nonlinear equivalent circuit is introduced in this paper for nonlinear simulation of this transformer. The equivalent circuit is extended using the nonlinear inductances. Employing a numerical method, leakage and magnetizing inductances in the split-winding transformer are extracted and the nonlinear model inductances are estimated using these inductances. The introduced model is validated and using this nonlinear model, inrush and short-circuit currents are calculated. It has been seen that the introduced model is valid and suitable for simulations of the split-winding transformer due to various loading conditions. Finally, the effects of nonlinearity of the model inductances are discussed in the following.
W artykule opisano ogólne zasady modelowania oddziaływania zaburzeń HPM na obiekty infrastruktury krytycznej (IK). Scharakteryzowano znane narzędzia wykorzystywane do modelowania skutków oddziaływania HPM. Następnie omówiono elementy modelowania występujące na pierwszym i drugim poziomie tzw. piramidy modelowania i symulacji skutków oddziaływania HPM.
EN
This paper describes the general principles of modeling the impact of HPM disturbances on objects of the critical infrastructure (IC objects). Current tools used to model the effects of HPM have been characterized. Then, the elements of modeling that belong to the first and second levels of the so-called modeling and simulation pyramids of the HPM impact have been discussed.