DC-DC converter for photovoltaic systems

This paper presents the implementation of a DC-DC converter for application in photovoltaic power systems. The project's purpose is to adapt a set of photovoltaic cells with 15 to 30 Vdc voltage to a 400 Vdc bus. The adopted topology possesses two conversion stages, DC/AC and AC/DC, with a high frequency transformer to isolate them. In this paper it is reported the operating stages, it is also presented the simulation and experimental results with ZVS operation. The experimental results were obtained with a prototype with 700 W power rating and 20 kHz switching frequency. It is ascertained that the waveforms obtained are according with theoretical analysis.