Three-phase interleaved boost DC/DC converter with high voltage gain and reduced nominal value on power devices

In this paper, a new interleaved boost dc-dc converter is presented for PV applications. The proposed converter consists of three-phase which are parallel connected to each other. There are voltage multiplier units between the phases for increasing the output voltage. By increasing the voltage multiplier units (by connecting the series together), the output voltage will be more increase. In addition, the nominal value of the power components is reduced. Therefore, the voltage stress of switches and diodes for various duty cycles is low and so, the efficiency is high. One of the other advantages of the proposed converter input current ripple is low with the utilization of interleaving techniques. These advantages cause the proposed converter to be a good candidate for PV panels. To illustrate the merits of proposed converter, comparison results with other converters are provided. Also, theoretical analysis for two stages with operating at 25kHz is provided.