Abstract
ABSTRACT This paper unveils an assessment of Power Quality (PQ) and its analysis for Three-Level and Five-Level Multilevel Inverter (TL:FL-MLI) in phase control and continuous conduction mode. TLMLI and FLMLI topologies are more weighted than traditional two-level inverters due to decreased filter size and modularity. The proposed MLI systems yield increase in active power output and decrease in Total Harmonic Distortion (THD) levels. Accuracy of systems is computed by connecting a resistance-inductance and DC source load. It is envisaged that the level of THD is mitigated under variable switching control modes while injecting active power to AC utility-grid. Subsequently, the control of switching angle is achieved through Sine Pulse Width Modulation (SPWM) technique and kept in the range of 90֯ to 165֯ for optimal control. SPWM control accomplishes the task to enhance the performance of MLIs under dynamic conditions. Furthermore, the superiority of FLMLI over TLMLI is established in synthesising ripple-free and balanced waveforms with reduced harmonic levels. The efficacy and feasibility of simulations for proposed schemes is validated through a small prototype. Comprehensive comparisons with earlier attempts in literature are provided with case studies which verify the ultimate performance of proposed topologies.
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