Estudo de desempenho de usinas de geração de energia fotovoltaica com uso de inversores string e sistemas simulados com otimizadores de potência

Abstract

This work aims to compare two types of technologies available in the photovoltaic solar energy market, the string inverter, most used in power plants, and a system with the use of power optimizers. Using three real power plants as the basis for these simulations, these three plants run on string inverters. Two different simulations were made for these plants, the first being an attempt to simulate the existing system, with maximum proximity to the real system, and the second simulations of each system were made to simulate this system with the use of power optimizers. Simulations were made using simulation software, such as PVSyst and solaredge's Designer. The first simulations of each system were made in PVSyst, and the steps used in the simulation were described, such as choice of irradiation data, 3D design, description of the equipment, detailing of strings and loss parameters. In the next simulation of each system, they were done in the Solaredge designer, in a similar way the simulation was described in the 3D drawing, in the choice of optimizers, module connections and other parameters. All systems present shading, increasing losses and decreasing generation. At the end of the simulations, the two simulations of each system were compared with the data obtained from the real plant, verifying both the generation data and how close the simulation of the real system was to the simulated one and the growth in generation in the simulation with the use of optimizers, the PVSyst simulations in general had satisfactory results, close to those expected. On the other hand, in the simulations where they were simulated with the power optimizers, good growth in the generation data was obtained, especially in the plant where more shading occurs.