Abstract
This paper shows the practical use of the software package FIELD_GS for the analysis of complex grounding systems (GS) in the protection of power and industrial systems. In order to get an accurate field calculation the finite element method (FEM) with isoparametric second order finite elements was applied. The automatic discretization of the soil domain was performed with 20-node 3D finite elements, while the GS domain was carried out using 3-node ID finite elements. In the program solution a spatial transformation of the semi-infinite into the finite space was applied. The FIELD_GS is suitable for any GS configuration and for isotropic or anisotropic soil properties.
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