Application of Frequency-Partitioning Fitting to the Phase-Domain Frequency-Dependent Modeling of Underground Cables

This letter shows that the frequency-partitioning-fitting (FpF) method can be successfully applied to the phase-domain frequency-dependent modeling of underground cables for electromagnetic-transient simulations. This letter is a continuation of a separate paper that has presented the applicability of the FpF method to overhead transmission-line modeling. In addition, this letter introduces a technique to efficiently identify a modal traveling time and a technique to reduce the number of poles for the model realization.