Integrated Three-Phase Transformerless PV Inverter

This paper proposes a transformerless PV converter in which both dc-dc boost and inverter stages are implemented by using a single standard three-leg inverter. The proposed solution furnishes an important level of component count reduction of active devices, which means cost, size and losses reductions in power switches and diodes. Furthermore, the paper presents: i) relevant characteristics of the system, ii) pulse-width modulation technique; iii) suitable control strategy; iv) voltage and current analysis; and v) simulated and experimental results.