Estudo comparativo: utilização de um inversor grid-tie central e micro inversores grid-tie em uma micro geradora de 26,4 kWp com sombreamento parcial

Abstract

This work presents a comparison between the use of a central grid-tie inverter and the use of grid-tie micro inverters in a 26.4 kWp photovoltaic plant where some panels present shading in part of the day, in order to analyze which systems presents better benefits in the same installation. For the generation comparison, data from the micro inverter monitoring software, APSystems EMA, were used. With the help of the software, the generation data from the plant using micro inverters were obtained, which is a real plant and already installed, to simulate the same plant using a central grid-tie inverter, the generation of each panel was analyzed in the EMA software, and they were separated into 4 strings of 20 panels, in each of them, the panels are leveled by the lower generation panel, thus simulating the behavior of a system in strings of a central grid-tie inverter. Analyzing these data and the acquisition cost of each of the plants, comparisons were made and conclusions were drawn.