Single-Phase Virtual-Ground Transformerless Buck–Boost Inverters

This article presents a new family of transformerless buck–boost voltage-source inverter topologies for photovoltaic systems. Due to variations in irradiance, temperature, and shading effects, the terminal voltages panels can vary, making use inverters crucial. The proposed have virtual-ground feature that effectively mitigates common-mode voltage issue results low leakage current. simple inductor-based achieve wide gain range. Also, other counterparts obtained from extending underlying concept inverter, such as switched inductor, three-winding coupled series capacitor converters, are capable achieving high boost with lower duty ratios. Comprehensive circuit analyses provided, along simulation results, confirm operation each topology. Additionally, experiment findings 500-W prototype built on inductor topology presented support theoretical analysis effectiveness designs.