A High-Gain Multilevel Inverter Topology with Low Harmonics for PV Grid-Tied Applications

The paper proposes a novel switched-capacitor multilevel inverter topology, designed for applications with low-voltage input supplies, such as photovoltaic power generation. The proposed multilevel inverter uses thirteen switches, four capacitors, four diodes, and only one DC source to produce 17level DC boosted output voltage. On the other hand, the voltage gain of the 17-level inverter is equal to eight. Low harmonics and high power quality (PQ) of output voltage and load current are some main advantages of the given topology, which makes it a grid-tied inverter. A self-balancing of the capacitor voltage, without any auxiliary circuits, and fewer components have been the additional features of the circuitry. The merits of the given 17-level inverter are assessed through a comparative analysis with recently presented converters. Additionally, the steady-state and dynamic performance of the suggested topology are validated through simulation in the PSCAD/EMTDC environment.