Avaliação experimental de topologias de conexão de módulos fotovoltaicos sob condições de sombreamento parcial

Abstract

With the increase in the efficiency of photovoltaic modules, the use of these systems in distributed and centralized generation is growing. In medium/large size photovoltaic installations, given the cost of the kWh, is ideal to use central inverters, which are economically more advantageous than microinverters. However, it is necessary to use a photovoltaic array topology that is capable to meet the inverter specifications and that is less susceptible to the effects of shading. This paper presents computational and experimental results, of the output power of a PV panel under normal operating conditions and in the occurrence of partial shading. Different types of shading are evaluated, shading modules both individually and in lines/columns. Through the results, it is possible to observe that topologies such as TCT and Sudoku allow extracting up to 270% more energy than other evaluated topologies.