Abstract
The multilevel inverters have several key applications in the industry, transportation, defence, nuclear and space research, etc. including high voltage DC transmission. A novel topology of the multilevel inverter with improved parameters is proposed in this paper. The parameters considered here for comparison with conventional multilevel inverter are number of switches, total harmonic distortion and power loss. The topology results in a three phase nine level multilevel inverter incorporating twenty-four switches with twelve DC sources which have been less than the conventional inverter circuit arrangements like Diode Clamped Multilevel Inverter, Flying Capacitor Multilevel Inverter including Conventional Cascaded H Bridge MultilevelInverter. A Selective Harmonic Mitigation strategy has been utilized for eliminating low order harmonics along with minimal power loss in the switches thus resulting in total harmonic distortion less than 7%. At any given time only three switches are operating with lower switching frequency such that heat loss in the switches get reduced. The comparative analysis of proposed topology with performing successful simulation is described in the paper. Circuit simulation results of proposed novel topology have also discussed.
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