Analysis of electrical grounding design of substation and lines

Abstract

This work analyzed the electrical grounding design of substation and lines. Substations are a crucial component of the electrical power system, so it is important to have properly designed grounding systems to protect people working nearby earthed facilities from electric shock risk, protect equipment from breakdowns, and ensure steady operation of the entire electrical system. There is frequently a concern that earth faults can produce hazardous voltage gradients in the earth at the site of the fault when energy is produced remotely and there are no other return channels for earth faults except the earth itself (called ground potential rises). In other words, someone standing close to the fault runs the risk of getting an electrical shock due to two factors: first, a potentially dangerous potential difference between the earth and any metallic objects they may be touching; and second, a potentially dangerous voltage gradient between their feet and the ground. The goal of constructing a safe grounding system is to give fault currents the simplest and shortest path without going above equipment and operating restrictions and negatively compromising service continuity. This work proposes a suitable grounding system design for alternating current (A.C.) substations based on the relevant IEEE Standards and International best practices. The study outlines the detailed calculations required to arrive at the mesh, touch, and step potential values appropriate for a good grounding system model for the A.C. Electrical substation. The suggested design provides for the safe functioning of all substation facilities, the safety of substation staff, and greater system dependability.