INVERTERS AND MULTILEVEL INVERTERS FOR POWER ELECTRONICS SYSTEMS
DOI:
https://doi.org/10.29121/shodhkosh.v5.i6.2024.4232Keywords:
Multilevel Inverter (MLI), Voltage Source Inverter (VSI), THD, THD, Harmonic Reduction, Pulse Width Modulation (PWM), Cascaded H-Bridge Inverter, Flying Capacitor Inverter, Neutral Point Clamped Inverter, Harmonic Distortion, Power Quality, Voltage Balancing, Modular Multilevel Converter (MMC), Electric Drives, Renewable Energy Systems, Switching DevicesAbstract [English]
Multilevel inverters (MLIs) have emerged as a crucial technology in power electronics, offering enhanced performance in high-power and medium-voltage applications. Unlike conventional two-level inverters, MLIs generate stepped voltage waveforms that improve power quality, reduce harmonic distortion, and minimize voltage stress on power semiconductor devices. This paper explores the various topologies of multilevel inverters, including diode-clamped, flying capacitor, and cascaded H-bridge configurations, along with their working principles and applications. Special emphasis is placed on the advantages of MLIs in renewable energy systems, electric vehicles, and industrial motor drives. Furthermore, recent advancements in modulation techniques and control strategies, such as space vector modulation and model predictive control, are discussed to highlight their role in improving the efficiency and reliability of multilevel inverters. The study concludes by addressing the challenges associated with MLIs, including complexity, cost, and switching losses, while also presenting potential future research directions in this evolving field.
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