Modelagem e simulação do sistema de proteção de um alimentador de distribuição de média tensão utilizando PS Simul

Abstract

The Electric Power System (SEP) is always subject to abnormal conditions in its components during its operation. These unwanted conditions affect the power supply and cause many inconveniences to consumers. To mitigate the consequences of power outages, the SEP must have protection systems along the power generation, transformation, transmission and distribution subsystems. The primary function of the protection system is to ensure equipment integrity, safety to people, and improve the reliability and quality of the power supply and provide the necessary information to facilitate problem identification and correction. Historically, computer programs are used to model and simulate electrical power systems (SEP) in order to analyze the behavior of SEP regarding the power quality, electromagnetic transients, short circuit, charge flow and protection actuation aspects. The most popular programs are PSCAD / EMTDC, PSS NETOMAC, MATLAB and ATPdraw. For many of the simulations it is necessary to use high level languages to aid in modeling. Most of these softwares are paid for, which makes their use in teaching electrical engineering difficult. ATPdraw, being a free and resourceful software, has been proposed and used in research and teaching of protection of electrical systems in Brazilian universities and companies in the electric sector. Despite these motivating factors, the lack of a user-friendly interface has been cited as a reason for not using ATPdraw on a large scale. Within this context, this article aims to present the modeling and simulation of the protection system of a medium voltage distribution feeder using PS SIMUL software.