The model, shown in figure 3, has been proposed by Pinceti–Gianettoni (Pinceti & Giannettoni
1999). This model is based on IEEE model with some differences. In this model the resistance
R0 stabilizes the numerical oscillations. The nonlinear resistors A0 and A1 can be estimated by
using curves shown in figure 2. The calculation procedure of inductances for this model has been
presented in (Pinceti & Giannettoni 1999).