Voltage and Current THD Minimization of a Single-Phase Multilevel Inverter with an Arbitrary RL-Load Using a Time-Domain Approach
Kar P.K. Priyadarshi A. Karanki S.B. Ruderman A.
1 December 2021Institute of Electrical and Electronics Engineers Inc.
IEEE Journal of Emerging and Selected Topics in Power Electronics
2021#9Issue 66817 - 6827 pp.
This article presents a time-domain optimization technique for minimizing harmonic content in the output voltage and current waveforms of a single-phase multilevel inverter (MLI) topology with an arbitrary RL -load. The effect of the modulation index and the load parameters variation on the harmonic content of load voltage and current have also been analyzed. A single-phase 21-level MLI is developed to verify the proposed switching technique. The total harmonic distortion (THD) of the current and voltage in the time-domain is considered as the optimization constraint to compute the inverters optimal switching angles. In addition, the load time constant has also been considered during optimization problem formulation, which enables superior inverter performance in terms of lower THD in the output response. The detailed theoretical, simulation, and experimental analysis are carried out on the presented topology to verify the proposed switching techniques performance.
Multilevel inverters (MLIs) , optimal switching angles , staircase modulation , total harmonics distortion (THD)
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School of Electrical Sciences, IIT Bhubaneswar, Bhubaneswar, 752050, India
Department of Electrical and Electronics Engineering, Nazarbayev University, Astana, 010000, Kazakhstan
School of Electrical Sciences
Department of Electrical and Electronics Engineering
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