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Simulation of Single Phase Multilevel Inverter Topology for Distributed Energy Resources Using Multi Inputs

B. Suresh Kumar, GantaJoga Rao

In the microgrid system, single-phase inverter is usually used for the distributed energyresource (DER). To reduce conversion losses, Removing the transformer and reducing power devices will bring down the cost and zise of the converter. The objective of this paper is to build simulation of seven levelmultistring inverter topology for DERs based DC to AC system. In this paper, a high step-up converter isused as front-end stage to improve the conversionefficiency of conventional boost converters and to stabilize theoutput DC voltage of various DERs such as PV and fuel cellmodules for use with the simplified multilevel inverter. Seven level inverter requires only six active switchesinstead of the eight required in the conventional cascaded H-bridgeinverter. In addition, two activeswitches are operated under line frequency. The simulatedseven level string inverter topology offers strong advantages such asimproved output waveforms, small filter size, and lowmagnetic interferenceand harmonic distortion. Simulation results show theeffectiveness of the proposed solution.