Phase Shift APOD and POD Control Technique in Multi-Level Inverters to Mitigate Total Harmonic Distortion

Kalsoom Bano, Ghulam Abbas, Mohammed Hatatah, Ezzeddine Touti (), Ahmed Emara and Paolo Mercorelli
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Kalsoom Bano: School of Electrical Engineering, Southeast University, Nanjing 210096, China
Ghulam Abbas: School of Electrical Engineering, Southeast University, Nanjing 210096, China
Mohammed Hatatah: Department of Electrical Engineering, Al-Baha University, Alaqiq 65779, Saudi Arabia
Ezzeddine Touti: Department of Electrical Engineering, College of Engineering, Northern Border University, Arar 73213, Saudi Arabia
Ahmed Emara: Department of Electrical Engineering, University of Business and Technology, Jeddah 21432, Saudi Arabia
Paolo Mercorelli: Institute for Production Technology and Systems (IPTS), Leuphana Universität Lüneburg, 21335 Lüneburg, Germany

Mathematics, 2024, vol. 12, issue 5, 1-26

Abstract: Multi-level inverters are widely employed to generate new energy because of their huge capacity and benefits in sound control performance. One of the critical areas of study for multi-level inverters is control strategy research. In this study, the control strategy for a multi-level inverter—which is frequently employed in HVDC and FACTS systems—is designed. An asymmetrical D.C. voltage source is supplied to create the appropriate output voltage waveform with fewer total harmonic distortions (THDs) at the output voltage and current waveforms. In this work, the pulse width modulation techniques of POD (phase opposition disposition) and APOD (alternative phase opposition disposition) MC PWM are applied to a multi-level inverter to generate the seven-level output voltage waveform. This study presents an enhanced variable carrier frequency APOD control approach that can successfully lower the overall harmonic distortion rate. The design and completion of the phase-shifting POD and APOD control strategies are followed by an analysis and comparison of the THD situation under various switching frequencies and a simulation and verification of the control strategy using MATLAB simulation. The TI DSP-based control approach has been programmed. The APOD technique increases the output voltage’s THD to 18.27%, while the output current waveform’s THD is reduced to 15.67% by utilizing the APOD PWM technique. Using the POD PWM approach increases the total harmonic distortion (THD) of the voltage waveform by 18.06% and the output current waveform’s THD by 15.45%.

Keywords: level-shifted POD; level-shifted APOD; THD; DSP control (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2024
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