Comparison of Reduced Part Count Multilevel Inverters (RPC-MLIs) for Grid Interfacing.

Recently, multilevel inverter (MLI) is gaining immense popularity due to reduced total harmonic distortion, lower electromagnetic interference, and high quality output waveform in high/medium voltage applications. The reduced part count (RPC)-MLI has attracted the researchers by providing higher number of output voltage level with reduced part count as compared to the classical topologies (cascaded H-bridge, neutral point clamped, and flying capacitor). But the discussion over their suitability for particular application is not yet explored completely. In this paper, some of the recently proposed RPC-MLI topologies are reviewed and analysed. RPC-MLI topologies are compared on the basis of number of switches, driver circuits, diodes, standing/blocking voltage across the switches, and switching losses for grid interfacing application. These topologies are simulated here under the same load and input source condition using real time simulator. [ABSTRACT FROM AUTHOR]