Conversor cc-cc de alto ganho para aplicações fotovoltaicas e injeção de corrente em nanorredes cc

Abstract

This work presents the study and development of a DC-DC converter with high voltage gain with current source characteristic for photovoltaic applications and current injection in DC nanogrids. The qualitative and quantitative analyzes of the converter are presented. To verify the performance of the converter, a prototype of 200 W was constructed, being designed to receive the energy coming from a photovoltaic module and to inject power in a 380 voltage bus. The proposed converter has few components and uses coupled inductor and switched capacitors to achieve gain high voltage gain without the need to operate with high cyclic ratios. The dispersion inductance of the coupled inductor enables the controlled switch to start driving with the reduced current, reducing switching losses. A maximum efficiency of 96.8% was obtained.