Calculation of frequency-dependent impedances of underground power cables with finite element method

Abstract

A finite-element method for the calculation of the frequency-dependent series impedances of underground power cables is described. These impedances are needed for the analysis of electromagnetic transients in power systems. A technique based on the perturbation concept is used to reduce the size of the solution region inside the poorly conducting earth. The impedances of buried single-core and pipe-type cables are calculated, and the results are compared with those from analytical formulas.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>