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Qasim, Mohammed A.; Velkin, Vladimir Ivanovich; Mohammed, Mustafa Fawzi; Sammour, Alaa Ahmad; Du, Yang; Salih, Sajjad Abdul-Adheem; Aljashaami, Baseem Abdulkareem; Gulmurodovich, Sharipov Parviz
International Journal of Power Electronics and Drive Systems (IJPEDS), 06/2023, Volume: 14, Issue: 2Journal Article
Overall harmonic distortion and losses will grow during an energy conversion process, while power stability will be reduced. Multilevel inverter technologies have recently become very popular as low-cost alternatives for a variety of industrial purposes. The design's minimal benefits include reduced component losses, decreased switching and conduction losses, along with enhanced output voltage and current waveforms. Also, a reduction of the harmonic components of the current and output voltage of the inverter are the most important requirements in multilevel inverters. A seven-level inverter design is presented in this paper that is simulated using MATLAB/Simulink. The inverter converts the DC voltage from three photovoltaic (PV) systems into AC voltage at seven levels. During an outage of one of the PV systems, the inverter will make a switching reduction and supply the AC voltage as a five-level inverter. The inverter’s total harmonic distortion (THD) when it performs as a five-level or seven-level inverter is 4.19% or 1.13% respectively. The modulation technique used is phase disposition via four carriers and a single reference signal at the fundamental frequency.
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