Grounding grid transient analysis using the improved transmission line model based on the finite element method

SUMMARY The improved transmission line (ITL) model of a grounding grid has been already used in engineering practice for a grounding grid transient analysis. This article offers a progress to the ITL model of a grounding grid on the basis of the finite element method, where ITL model is developed using finite element method applied to the system of multiconductor telegrapher equations. To check accuracy of the proposed method, the results obtained using ITL approach has been compared with the results calculated using electromagnetic field approach and very good correlation has been obtained. Copyright © 2011 John Wiley & Sons, Ltd.