Diseño nuevo de un sistema de puesta a tierra para mejorar las condiciones de operación de la subestación cartorama a 69KV

Abstract

The evaluation and improved design of the grounding mesh of the Cartorama C. A. substation with a voltage of 69 kV is essential to guarantee the safety and correct operation of the electrical infrastructure. The grounding mesh consists of a system of metallic connections that provides a safe path for the discharge of fault currents and protects both people and equipment from possible electric shocks. In the specific case of the Cartorama C. A. substation, it is necessary to carry out a thorough evaluation and an improved design of the grounding grid, taking into account the safety requirements and current regulations. This implied having carried out a detailed analysis of the characteristics of the terrain, the expected fault currents and the operating conditions of the substation. For the evaluation process of the grounding mesh, it was implied to measure the resistivity of the ground and thus we determined its electrical resistance. The grounding resistance needed to safely dissipate the fault current was also calculated. In addition, factors such as current dispersion, power distribution, and surge protection were considered. Having completed the evaluation, a new design of the grounding mesh was made. For this process, the measurements of the terrain were taken into account, which in this case were 81m^2 in this proposed design, ambient temperatures of 35°C were achieved with a resistivity of 30Ω*m