MODELAGEM DOS SISTEMAS DE PROTEÇÃO E FALHAS DE UMA SUBESTAÇÃO DE DISTRIBUIÇÃO UTILIZANDO REDES DE PETRI

Abstract

The appropriated and secure supply of electrical energy directly impacts on the present society. The increase in demand favors the growth of electrical systems, especially in distribution networks and substations, since they are responsible for lowering the electrical voltage, allowing energy distribution to the population. To keep distribution networks and substations running, without interruption or discontinuity, is utmost importance for the maintenance of electric power supply, and it is necessary to implement means to locate and improve the electrical protections in order to reduce failures or to suspend the electricity distribution. Distribution failures may result from lightning, overcurrent, short circuits, overvoltages, oil leakage on transformers, impedance failure etc. The present work presents the problem of possible defects that result in the substation power blackout, and aims to reduce the amount and frequency of substation power blackouts, contributing to the increase in industrial production. In this regard, qualitative and quantitative models using Petri nets of an electrical substation of distribution were developed, using simulation scenarios to indicate possible improvements in the electrical protections, reducing the inaccuracies and interruptions.