High-voltage gain DC–DC boost converter with coupled inductors and interleaved for a PV system to supply data centers

Abstract

This study presents the analysis and design of a high-voltage gain dc–dc converter applied to photovoltaic systems. A Battery bank rated at 24 V is connected to the input side, and the converter is responsible for stepping the voltage up to 311 V, in order to supply a Data Center to be used at IFRN’s Campus Verde (Federal Institute of Rio Grande do Norte’s Green Campus), where there is already a photovoltaic plant connected to the AC bus. The idea of a direct current supply is to improve the quality of energy delivered to such loads. This study proposes a converter topology with interleaved operation between two boost converters with coupled inductor and duplicity of the exit module to improve the ripple of the output voltage and reduce the high voltage on the output diode of converter, respectively. The Interleaved topology between two converters with a lag of the 180o promotes the reduction of output voltage ripple as well as filter elements, since it allows the load to receive the double of switching frequency, and doubles the total output power of the circuit. The interleaving concept reduces input current ripple and the input inductance size. In addition, the dimensioning voltage is not output voltage but capacitor voltage, which is lower than output voltage, reducing costs.