tThe problem of finding the absolute potential and grounding resistance of an electrode system in amultilayered soil is dealt in this paper. Some of the electrodes may be embedded in finite inhomoge-neous volumes scattered into the soil. Furthermore, the electrodes may or may not be interconnected. Asemi-analytic method is proposed, which is applied to the study of the electrical properties of a groundelectrode connected to a metallic grid which is embedded into a cubic volume made of concrete. Thisvolume may be buried in the soil or lying above the ground surface. The problem of high resistivity ratiosbetween the volume and the surroundings is addressed. The paper focuses on the ill-conditioning of thesystem impedance matrix, resulting in inaccurate numerical solutions of the problem. A procedure willbe suggested in order to obtain acceptable solutions in some cases, without increasing the computationalcost.
tThe problem of finding the absolute potential and grounding resistance of an electrode system in amultilayered soil is dealt in this paper. Some of the electrodes may be embedded in finite inhomoge-neous volumes scattered into the soil. Furthermore, the electrodes may or may not be interconnected. Asemi-analytic method is proposed, which is applied to the study of the electrical properties of a groundelectrode connected to a metallic grid which is embedded into a cubic volume made of concrete. Thisvolume may be buried in the soil or lying above the ground surface. The problem of high resistivity ratiosbetween the volume and the surroundings is addressed. The paper focuses on the ill-conditioning of thesystem impedance matrix, resulting in inaccurate numerical solutions of the problem. A procedure willbe suggested in order to obtain acceptable solutions in some cases, without increasing the computationalcost. Read More
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