Estudo comparativo sobre o desempenho entre usinas de geração de energia fotovoltaica com uso de inversores string e microinversores

Abstract

In the last decades the generation of electric energy from renewable resources has grown a lot around the world. Among these renewable sources is the photovoltaic solar energy that allows the use of solar radiation to generate electricity in a clean way and low maintenance cost. In Brazil, the demand for acquisition of photovoltaic energy systems has increased exponentially over recent decade, making the distributed generation market one of the fastest growing in the country. Along with this growth, new technologies have bee n developed to increase the efficiency of photovoltaic plants. One of these technologies are microinverters , which have become an alternative to traditional inverters because they provide an estimated energy gain of 5 to 25% through their differences, main ly the individualization of modules. From this perspective, this work aims to compare the performance of two plants installed on the same roof located in Fortaleza-CE, one equipped with microinvestors and the other with a string inverter. The methodology adopted is based on the analysis of performance and financial indicators commonly used in the literature and commercially among companies in the sector. With the results obtained, it was found that the installation with microinverters operates with a better performance of approximately 8% in relation to the string inverter in all calculated indicators.