Análise comparativa do inversor string e microinversor para sistemas de geração de energia solar fotovoltaica

Abstract

Renewable energies are on the rise, especially when it comes to solar energy. The conversion of this energy source into electrical energy is done through photovoltaic systems. In these systems, the presence of inverters is essential, as they convert direct current (DC) into alternating current (AC), suitable for connecting the system to the electrical grid These inverters can be distinguished by their topology, they can be of the string inverter and microinverter type. Through the evolution of this energy source, this study aims to present a comparative analysis of string inverter and microinverter for photovoltaic solar energy. And as specific objectives: Show the stages of the photovoltaic solar energy system; Address the characteristics of string inverter and microinverter systems and; Conduct an analysis of string inverter and microinverter systems. Through an exploratory bibliographic review, with a qualitative approach, referring to works published nationally and internationally, this study will be divided into three chapters: The first will deal with Photovoltaic Solar Energy Systems, taking all the theoretical basis of authors to to delve deeper into the subject from the photovoltaic potential in Brazil to the production and manufacture of the photovoltaic cell. Next, the specifications of the inverters and their topologies and the microinverters will be described separately, reporting their advantages, configurations and efficiency, as well as the characteristics of string inverter and microinverter systems. The last chapter will bring the analysis of the string inverter and microinverter systems so that the comparison of the two systems can be carried out and thus reach a conclusion. In conclusion, the comparison of string inverter and microinverter for photovoltaic solar energy in the analyzed studies made it clear that microinverters, although they still have a high cost, are ideal for increasing energy capture, even on cloudy days. In addition to presenting greater reliability, flexibility and modularity and with the advances in technologies in the world, it is possible to invest more and more in photovoltaic solar energy, so it is necessary that government incentives occur so that the values of equipment are lower and thus, more families able to join the system.