Application of the finite element method for the analysis of the grounding grid implying the finite line elements

In this paper, the new numerical model is presented to analyze the electromagnetic field around the grounding grid. In contrast to recently existent procedure based on the “classical” finite element method (FEM), in this new methodology the soil and the air domain of the problem are discretized by the 3-D finite elements and the conductors of the grounding grid are discretized by 1-D finite line elements. The results of calculations have been verified by comparison with the results of measurements found in the literature.