An Efficient MPPT Technique-Based Single-Stage Incremental Conductance for Integrated PV Systems Considering Flyback Central-Type PV Inverter

Ahmed Ismail M. Ali (), Zuhair Muhammed Alaas, Mahmoud A. Sayed, Abdulaziz Almalaq, Anouar Farah and Mohamed A. Mohamed ()
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Ahmed Ismail M. Ali: Electrical Engineering Department, South Valley University, Qena 83523, Egypt
Zuhair Muhammed Alaas: Electrical Engineering Department, Jazan University, Jazan 45142, Saudi Arabia
Mahmoud A. Sayed: Electrical Engineering Department, South Valley University, Qena 83523, Egypt
Abdulaziz Almalaq: Department of Electrical Engineering, Engineering College, University of Ha’il, Ha’il 55476, Saudi Arabia
Anouar Farah: Department of Electrical Engineering, Engineering College, University of Ha’il, Ha’il 55476, Saudi Arabia
Mohamed A. Mohamed: Electrical Engineering Department, Faculty of Engineering, Minia University, Minia 61519, Egypt

Sustainability, 2022, vol. 14, issue 19, 1-15

Abstract: Central-type photovoltaic (PV) inverters are used in most large-scale standalone and grid-tied PV applications due to the inverter’s high efficiency and low-cost per kW generated. The perturbation and observation (P&O) and incremental conductance (IncCond) have become the most common techniques for maximum power point tracking (MPPT) strategies of PV/wind generation systems. Typically, the MPPT technique is applied in a two-stage operation; the first stage tracks the MPP and boosts the PV voltage to a certain level that complies with grid voltage, whereas the second stage represents the inversion stage that ties the PV system to the grid. Therefore, these common configurations increase the system size and cost as well as reduce its overall footprint. As a result, this paper applies two IncCond MPPT techniques on a proposed single-stage three-phase differential-flyback inverter (DFI). In addition, the three-phase DFI is analyzed for grid current negative-sequence harmonic compensation (NSHC). The proposed system efficiently provides a MPPT of the PV system and voltage boosting property of the DC-AC inverter in a single-stage operation. Moreover, the MPPT technique has been applied through the DFI using the conventional and modified IncCond tracking strategies. Furthermore, the system is validated for the grid-tied operation with the negative-sequence harmonic compensation strategy using computer-based simulation and is tested under uniform, step-change, as well as fast-changing irradiance profiles. The average efficiencies of the proposed system, considering the conventional and modified IncCond MPPT techniques, are 94.16% and 96.4% with tracking responses of 0.062 and 0.035 s and maximum overshoot of 46.15% and 15.38%, respectively.

Keywords: MPPT; incremental conductance (IncCond); differential inverter; differential flyback inverter (DFI); high-frequency transformer (HFT); continuous modulation scheme (CMS); harmonic compensation (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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