Mode switching in modal domain models of overhead lines and underground cables

Abstract

This paper presents brief review of different methods for calculation of eigenvalues and eigenvectors for application in the modal transmission line theory. In this field of particular interest is the numerical phenomenon known as “mode switching”. “Mode switching” is related to very specific frequencies and must be properly treated in modal domain models of overhead lines and underground cables. This paper summarizes the methods and identifies the differences among them. Impedance and admittance matrices of overhead lines and underground cables are calculated in wide range of frequencies in order to compare different methods.

Ranko Goić

Full Professor | Department of Power Grids and Substations

Full professor at the Faculty of Electrical Engineering, Mechanical Engineering, and Naval Architecture in Split exeperienced in transmission and distribution networks, renewable energy sources (RES), power system planing and economics