Single DC-Link based 5-Level MLI topology for Renewable and grid Applications with fewer Switches

This article describes a 5-level single DC source multilevel inverter(SDS-MLI) with fewer components and optimum efficiency. MultipleDC source MLI topologies are presently deemed unsuitable for arange of applications, such as renewable energy (RE) conversion systemsand grid applications, while single DC source MLI topologies aremore suitable. Existing MLI circuits have more active/passive components,but the SDS-MLI design employs a level-doubling network,requires fewer components, and reduces the DC-link voltage for gridapplications. The SDS-MLI uses one capacitor, six switches, and aDC supply. A primary control method enforces a well-known phasedisposition carrier arrangement to actualize the presented configuration.Existing systems are evaluated based on the number of activeand passive components, their efficiency, capacitor voltage, and voltagestress. In comparison to existing topologies, SDS-MLI has fewercomponents, a lower capacitor voltage, and less TSVs to achieve anefficiency of 98.66%. MATLAB/Simulink and experimental setups areused to verify the SDS-MLI architecture. On the basis of experimentalsetup and simulation, the number of load voltage & load currentwaveforms under various situations such as variable load, varied inputsupply, different frequencies, and different modulation indexes are shown.