Study of a Family of Buck-Boost Converter with Tapped Inductor for Grid-Connected Photovoltaic Systems

Among the photovoltaic (PV) systems, the ones interconnected to the electric system have presented a greater growth in the developed countries. In order to transform the generated DC energy in AC energy ready to be delivered to a grid, the concept of AC Module is applied. But the problem of generating quality voltage to the network from a single PV module arises. As a solution, the topology of the buck-boost converter with tapped inductor is studied, with the purpose of selecting the converter appropriated for an integrated PV inverter applied to residential use with connection to a single-phase grid, providing high benefits without isolation. Its performance is evaluated by means of an electronic simulator PSpice and it is verified with a prototype.