Matriz lógico-estrutural: análise do alocamento de equipamentos de proteção e os impactos nos indicadores de confiabilidade

Abstract

The National Electric Energy Agency (ANEEL) has progressively applied stricter regulations regarding the quality of energy supplied to consumers. Continuity limit indicators (DEC and FEC) are gradually reduced in order to encourage utilities to invest in the reliability of electricity distribution systems. The electricity sector presents a considerable pace of expansion seeking to meet the growth in demand for electricity, the development of new systems must consider the use of technological protection devices, that is, equipped with remote control or reclosing function in order to provide greater reliability to the systems on which they are installed. The challenges in replacing or relocating protection devices in electrical systems in Brazil are concentrated in the diversity of scenarios where the systems are disposed, making them susceptible to different types of failures. Currently, logical-structural matrices are widely used due to the possibility of application both in projects under development and in existing projects, indicating the best option for modifications to the installed protection devices, making it possible to determine the economic feasibility for concessionaires to reduce amounts paid in compensation by improving the reliability of the electricity distribution system. Therefore, through the application of the logical-structural matrix, we seek to analyze the impact of the modification of protective equipment on the reliability of the distribution system. More specifically, calculations of continuity indicators for radial feeders are discussed and the gains obtained with the insertion of devices with lower failure rates are measured.