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 skin and proximity effects. The application to a three-phase armored cable with wire screens demonstrates a speedup 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 Electromagnetic Transients Program-type simulation tools. Currently, these tools can only take skin effect into account. © Copyright 2013 IEEE - All rights reserved.