A Multiport Converter for Seamless PV-Grid Integration in EV Charging Systems

Sustainable solutions, including distributed generation from renewables, energy storage systems, and electric vehicles (EV), necessitate advanced power conversion and control techniques. The demand for hybrid dc-ac power systems is escalating due to technological advancements like fuel cells, solar PV panels, batteries, and ac-dc grids. Integrating highly nonlinear loads, such as EV charging stations, with renewable energy sources further underscores this trend. Additionally, EV powertrains must smoothly manage the interaction between AC motors and DC sources, i.e., batteries, fuel cells, or supercapacitors, that is typically achieved through multiple power converters. In this case, EV powertrains require two or more power converters to effectively regulate power flow between AC motors and DC sources. This multi-stage power processing requirement can be alleviated by designing a bidirectional power converter with multiple AC and DC ports. This paper proposes a multiport converter with integrated PV array, EV battery charging ports and the AC grid for EV charging applications.