Abstract
Multi-level inverters (MLI) have improved power quality at output voltage as compared to conventional inverters. In MLI, number of switches increases with number of levels in output voltage. This increases the complexity and reduces the reliability of the MLI. In this chapter, a three-phase five-level MLI is proposed which involves lesser number of switches as compared with other topologies present in literature. The proposed MLI involves a single DC source and two capacitors along with 10 switches. For reducing total harmonic distortion (THD) in output voltage of the proposed MLI, a particle swarm optimization (PSO)-based selective harmonics elimination method is adopted. The proposed MLI topology is modeled in MATLAB®/Simulink. The simulation results obtained show the improved THD in output voltage and thus confirm the effectiveness of the proposed optimization method for the MLI. The proposed MLI can be used for the integration of renewable resources in the utility grid system.
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