Modeling and Control of a Voltage-Lift Cell Split-Source Inverter With MPPT for Photovoltaic Systems

Abstract

In this study, a new single-stage inverter with improved boosting performance was proposed to enhance the recently developed split-source inverter (SSI) topology. The study introduced new SSI configurations with high voltage gain. The proposed design features a voltage-lift cell made of capacitors, inductors, and diodes, which increases the boosting capability. The decoupled control technique, where The DC input current is controlled by the AC modulation signals,allows for independent adjustment of both the DC input and AC output current. The research also employed a modified space vector modulation approach to manage the inverter switches and reduce current ripple. The combination of the proposed topology and the modified SVPWM scheme significantly improves the DC-boosting capabilities. the validity of the proposed solution was confirmed through simulation using three-phase SSI models in MATLAB/SIMULINK®. Finally, The validity of the simulation and experimental investigation of the analysis and performance of the topologies provided.INDEX TERMS Decoupled control, grid connection, photovoltaic systems, three-phase split-source inverter (SSI), voltage-lift cell SSI.