Estudos elétricos para conexão à rede báscia de uma central geradora solar fotovoltaica utilizando a ferramenta computacional ANAREDE

Abstract

Brazil has a mostly renewable electricity matrix, since most of energy comes from hydroelectric plants, however, the strong dependence of this source can be a problem in situations of scarcity of water resources. Thus, investment in other energy sources is desirable to ensure greater energy security and, one of the sources that can be used is photovoltaic solar energy, since the country has in most of its territory excellent solar irradiance rates. Brazil uses photovoltaic solar energy mainly as distributed generation, but solar photovoltaic is still an incipient source that presents low expressiveness in the national electric matrix. This work analyzes how the connection of a photovoltaic solar power plant in the basic network would affect the various parameters related to the quality of the energy, such as: line flows limits, transformers limits, voltage in the buses of the system, etc. Based on a proposed 200 MWp solar plant for Massapê-CE, study of the power flow in the electrical network was carried out using ANAREDE software to analyze some parameters such as: transmission lines and transformers loading, bus voltage magnitude and phase angles. Simulations were developed for the base scenario, before the connection of the solar plant, and for different scenarios after the photovoltaic power plant connection. The analysis was done considering the current system and the expected load increases between the years 2019-2021, for the normal operating condition and using safety criteria n-1.