Abstract

Renewable sources of energy are interlinked with power grid through grid tied inverters and the injected power must meet the world harmonic standards. In this paper a comparison between various single phase multilevel inverter (MLI) topologies with reduced number of switches. The classical inverter topologies Diode Clamped, Flying Capacitors, Cascaded H-bridge, are good alternatives in high power and medium power applications. Although power semiconductor switches are required in MLIs which requires a gate drive circuit, which makes overall system more bulky, complex and expensive. The main objective of these topologies is to reduce the overall number of power elements which are required in conventional topologies. In this paper some MLI topologies has been analyzed and a brief comparison of these topologies have been presented.

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