Diseño de una malla de puesta a tierra para una subestación de distribución en condiciones de suelo extremas

Abstract

The document contains the technical-basics mesh grounding in electrical substations. It described in detail the main methods of measuring resistivity. Before making the design is analyzed in detail the inherent parameters of the model of heterogeneous two-layer soil (depth of the first layer, ratio of resistivities ρ1 <ρ2 and ρ1> ρ2, and magnitude of resistivity) that affect the magnitude of resistance ground (Rg) and voltages up a square mesh, using a computer program. Furthermore, the effect is analyzed lengthening the length of the javelins or grounding rods on the design parameters (Rg, step voltage and touch voltage). Finally the effect of installing the grounding grid in the first layer and the second layer is analyzed. Once the mesh designed proceeds to obtain the equations governing the total cost of the proposed facility, considering trenching, installation of grounding conductors and vertical rods or javelins.