Desenvolvimento de ferramenta computacional para estudo de proteção e seletividade para entrada de serviço em tensão primária de distribuição 13,8 KV conforme diretrizes da COPEL

Abstract

This paper is about the concept involved in protection and selectivity studies destinated for consumers connected in the primary network distribution of Companhia Paranaense de Energia. According to NBR14039 This situation is mandatory for consumers with transformation power over 300 kVA, and it evolves the calculation of short-circuit current inside the installation, also the influence of the electrical equipments to the circuit. The goal of the study is to determine the adjustment of time and current of the protection relay, as well as fuse’s designation for transformer’s protection. The result achieved in this paper is a presentation of a protection and selectivity study for a fictitious factory, following a step by step concept, without the use of computer software’s. Lastly, it presents computational tools capable of assisting some development’ stages of the protection and selectivity study, creating a report than can assist the Energy Utility.