Fast Computation of the Series Impedance of Power Cables with Inclusion of Skin and Proximity Effects

TL;DR

This paper introduces a fast numerical method for calculating the series impedance of power cables, accurately including skin and proximity effects, significantly improving computational speed for cable modeling in simulation tools.

Contribution

A novel surface admittance operator combined with the method of moments enables rapid and accurate impedance calculations including proximity effects.

Findings

Achieves about 100x speed-up over finite element methods

Accurately predicts skin and proximity effects in cable systems

Enhances EMTP-type simulation capabilities with comprehensive impedance modeling

Abstract

We present an efficient numerical technique for calculating the series impedance matrix of systems with round conductors. The method is based on a surface admittance operator in combination with the method of moments and it accurately predicts both skin and proximity effects. Application to a three-phase armored cable with wire screens demonstrates a speed-up by a factor of about 100 compared to a finite elements computation. The inclusion of proximity effect in combination with the high efficiency makes the new method very attractive for cable modeling within EMTP-type simulation tools. Currently, these tools can only take skin effect into account.