Uma nova metodologia para o dimensionamento de sistemas off-grid com armazenamento

Abstract

In contrast with the environmental problem, the global power of electrical energy is increasing, demanding energy transitions from the energy supply sectors toward more efficient and less polluting energy sources. In Brazil, the primary source of electricity generation is hydraulic, but with the current development of alternative sources and water crises, sources such as solar photovoltaics have experienced growth. Brazil is a country with a high potential for developing photovoltaic solar energy technology. Within the applications of photovoltaic solar energy, there are isolated systems with storage, which do not need to be connected to the conventional electricity grid and are usually sized based on simplified methodologies based on the peak sun hours. In this context, this work proposes an alternative design methodology that seeks to consider the particularities of the power flow of direct current (DC) and alternating current (AC) loads, as well as a more precise sizing of the generator using the insolation method with module efficiency correction for their actual operating temperature and irradiation conditions. At the end of the work, the proposed project methodology is showed through a case study applied to an isolated residence in the city of Garanhuns in Pernambuco. Keywords: Photovoltaic solar energy. Design methodologies. Off-grid photovoltaic systems with storage.