Equalização do Sistema em Ilhamento Programado: Um caso de Simulação de Perturbação

Abstract

Electricity is essential for the development of the daily activities of society, consuming in its essence, so that interruptions in its supply can cause great inconvenience. The electrical system should always be prepared to minimize occurrences that can generate disturbances and protections are key elements in this process, eliminating disturbances quickly and respecting selectivity. The Brazilian electrical system presents great operational complexity, since most of it is interconnected and the sources of generation are distributed in the various regions of the country. Some occurrences may isolate small areas with the presence of generation and load units, however, there will be a difference in the amount generated in relation to the consumed, causing disturbances in the island system. With this, anti-island protections occur, leaving an area desabastecida, consequently interrupting the operation. In this sense, the purpose of this work is the investigation of an alternative configuration for a special scheme, based on the protection itself used in conventional models. In such a way, it seeks to detect an area composed of generation and load that are in an island condition and lead this part of the system to equalization. Thus, instead of the conventional mode, it proposes the balance of the islanded system through the generation cut, so that the supply of this area is maintained and it is within the parameters for recomposition. To meet the proposal, the Matlab/Simulink® software is used, which allows the modeling and simulation of alternative configurations, and, based on a system similar to that found in the literature, with commonly used protections, one can compare the results obtained. Based on this modeling, different operational scenarios are elaborated, considering the system with the current protections and later considering generation and load equalization features. Thus, it seeks to explore the feasibility of implementing the proposed configuration.