A five-level (5-L) double gain inverter for grid-connected and photovoltaic applications

This paper proposes a single-stage, 5-L common-ground-based inverter for grid-connected photovoltaic (PV) applications. The suggested design is able to enhance the PV input voltage by charging and discharging the capacitors in sequence. In order to achieve this, a peak current controller-based method that controls both the active and reactive powers that are injected into the grid is employed to create the pulses that are used to activate the power switches. The injected current dynamics are controlled using a phase-locked loop system. The performance of the suggested topology is evaluated using the MATLAB/Simulink software. The simulation results indicate that the proposed topology outperforms the other topologies in terms of component count, total standing voltage, and cost factor as well as the removal of leakage current. In addition, the performance of a prototype designed out of scaled-down hardware is also tested in the testing facility. This suggests that the utilization of proposed MLI and its corresponding control techniques exhibit efficacy in attaining the intended performance goals.