Comparação das contribuições de curto-circuito em uma usina fotovoltaica de 4 MW conectada a uma rede de média tensão

Abstract

Due to the significant advancement and growing demand for electric power, along with the increasing viability of photovoltaic solar generation, an alternative has emerged: users of the electrical grid can now produce their own energy, and even inject it back into the grid. As a result, distributed generation has also been growing considerably in Brazil. The National Electric Energy Agency, through its regulations, seeks to ensure the longevity of these systems, as well as the equipment that comprises them. However, without proper analyses and calculations related to short circuits in these systems, it becomes essential to ensure the safety of the system and its associated equipment. In light of this, the present study initially aims to collect relevant technical information regarding the system and the generation of the consumer unit. Next, the necessary short-circuit calculations will be performed for the medium-voltage photovoltaic system. Subsequently, using the obtained values, a model of the generation system will be developed in the Anafas software in order to obtain the fault currents. Based on the resulting plots, the short-circuit study will be developed through considerations of the analyses and obtained values. The aim of this project is to compare the three-phase and single-phase short-circuit contributions of a photovoltaic power plant connected to strong and weak grids in a medium voltage system.