Design of Cascaded Multilevel Inverter and Enhanced MPPT Method for Large-Scale Photovoltaic System Integration

Fatima Z. Khemili, Omar Bouhali, Moussa Lefouili, Lakhdar Chaib, Attia A. El-Fergany and Ahmed M. Agwa ()
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Fatima Z. Khemili: Mechatronics Laboratory (LMT), University of Mohamed Seddik Ben Yahia, Jijel 18000, Algeria
Omar Bouhali: Mechatronics Laboratory (LMT), University of Mohamed Seddik Ben Yahia, Jijel 18000, Algeria
Moussa Lefouili: Mechatronics Laboratory (LMT), University of Mohamed Seddik Ben Yahia, Jijel 18000, Algeria
Lakhdar Chaib: Energy and Materials Laboratory, University of Tamanghasset, Tamanghasset 11001, Algeria
Attia A. El-Fergany: Electrical Power and Machines Engineering Department, Zagazig University, Zagazig 44519, Egypt
Ahmed M. Agwa: Department of Electrical Engineering, College of Engineering, Northern Border University, Arar 1321, Saudi Arabia

Sustainability, 2023, vol. 15, issue 12, 1-20

Abstract: The key goal of this effort is to develop an efficient control system for a three-phase cascaded H-bridge multilevel inverter powered by the photovoltaic (PV) system. The power for the system is generated through the use of PV modules, which serve as DC inputs for the cascaded H-bridge multilevel inverter. The authors aim to achieve a nearly sinusoidal signal at the voltage level and are specifically focused on minimizing the total harmonic distortion (THD) to the smallest possible value. Hence, an advanced N-level space vector modulation (SVM) is developed to ensure an appropriate control for the cascaded inverter. The aim is to design an effective control strategy to increase inverter efficacy and, thus, supply the best output quality. In addition, a robust approach to the maximum power point (MPP) tracking (MPPT) technique is developed based on an adaptive perturb and observe (P&O) algorithm to ensure superior tracking of the MPP. The developed algorithm eliminates 90% of the power curve area in the search space process and only maintains 10% of the area that includes the MPP. Each PV system employs its own improved MPPT control. The numerical results confirm that the enhanced P&O algorithm attains a precise response with superior efficiency and a fast response under the fast alteration of environmental conditions. Hence, the energy loss is reduced. The simulation results validate the effectiveness of this study, highlighting the high efficiency of the control strategy and the enhanced performance of the proposed scheme with lesser THD values.

Keywords: PV generation; multilevel inverter; space vector modulation; maximum power point tracking; total harmonic distortion (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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