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Model-Free Predictive Current Control of a 3-φ Grid-Connected Neutral-Point-Clamped Transformerless Inverter.

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Title: Model-Free Predictive Current Control of a 3-φ Grid-Connected Neutral-Point-Clamped Transformerless Inverter.
Authors: Zaid, Sherif A.1 (AUTHOR) halbala@ut.edu.sa, Bakeer, Abualkasim2 (AUTHOR) shfaraj@ut.edu.sa, Albalawi, Hani1,3 (AUTHOR), Alatwi, Adel M.1,4 (AUTHOR), Abdeldaim, Hassan1 (AUTHOR), Manqarah, Bassel1 (AUTHOR)
Source: Energies (19961073). Apr2023, Vol. 16 Issue 7, p3141. 16p.
Subjects: Stray currents, Earth currents, Electrical energy, Photovoltaic power systems, Electric power distribution grids
Abstract: Utility grid-tied photovoltaic (PV) installations are becoming a typical component of the current electrical energy grid. The adoption of transformerless inverters has recently changed the topology of these systems. Despite being small, inexpensive, and effective, transformerless inverters have a recurring leakage current issue. Numerous studies are being conducted to improve its performance and bring the leakage current down to acceptable levels. The studies propose three tracks for addressing the leakage current problem of transformerless PV systems: the control technique, the inverter modulation, and the inverter topology. This study applies the model-free predictive control (MFPC) technique to a grid-connected NPC 3-φ transformerless converter powered by a PV panel. An LCL filter connects the transformerless inverter to the grid. The system model considers the grid filter components and the internal impedance of the utility grid. The proposed system's discrete model is established before describing the MFPC controller's algorithm. The suggested system is simulated in MATLAB using the MFPC and a standard PI current controller with SVPWM modulation. According to the simulation's findings, the MFPC controller performs best regarding current spectrum, THD, and earth leakage current. Additionally, MFPC-based systems are more efficient than those that use PI controllers. [ABSTRACT FROM AUTHOR]
Copyright of Energies (19961073) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
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  Data: Model-Free Predictive Current Control of a 3-φ Grid-Connected Neutral-Point-Clamped Transformerless Inverter.
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  Data: <searchLink fieldCode="AR" term="%22Zaid%2C+Sherif+A%2E%22">Zaid, Sherif A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> halbala@ut.edu.sa</i><br /><searchLink fieldCode="AR" term="%22Bakeer%2C+Abualkasim%22">Bakeer, Abualkasim</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> shfaraj@ut.edu.sa</i><br /><searchLink fieldCode="AR" term="%22Albalawi%2C+Hani%22">Albalawi, Hani</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Alatwi%2C+Adel+M%2E%22">Alatwi, Adel M.</searchLink><relatesTo>1,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Abdeldaim%2C+Hassan%22">Abdeldaim, Hassan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Manqarah%2C+Bassel%22">Manqarah, Bassel</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. Apr2023, Vol. 16 Issue 7, p3141. 16p.
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  Data: <searchLink fieldCode="DE" term="%22Stray+currents%22">Stray currents</searchLink><br /><searchLink fieldCode="DE" term="%22Earth+currents%22">Earth currents</searchLink><br /><searchLink fieldCode="DE" term="%22Electrical+energy%22">Electrical energy</searchLink><br /><searchLink fieldCode="DE" term="%22Photovoltaic+power+systems%22">Photovoltaic power systems</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+power+distribution+grids%22">Electric power distribution grids</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Utility grid-tied photovoltaic (PV) installations are becoming a typical component of the current electrical energy grid. The adoption of transformerless inverters has recently changed the topology of these systems. Despite being small, inexpensive, and effective, transformerless inverters have a recurring leakage current issue. Numerous studies are being conducted to improve its performance and bring the leakage current down to acceptable levels. The studies propose three tracks for addressing the leakage current problem of transformerless PV systems: the control technique, the inverter modulation, and the inverter topology. This study applies the model-free predictive control (MFPC) technique to a grid-connected NPC 3-φ transformerless converter powered by a PV panel. An LCL filter connects the transformerless inverter to the grid. The system model considers the grid filter components and the internal impedance of the utility grid. The proposed system's discrete model is established before describing the MFPC controller's algorithm. The suggested system is simulated in MATLAB using the MFPC and a standard PI current controller with SVPWM modulation. According to the simulation's findings, the MFPC controller performs best regarding current spectrum, THD, and earth leakage current. Additionally, MFPC-based systems are more efficient than those that use PI controllers. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Energies (19961073) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/en16073141
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      – Code: eng
        Text: English
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        PageCount: 16
        StartPage: 3141
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      – SubjectFull: Stray currents
        Type: general
      – SubjectFull: Earth currents
        Type: general
      – SubjectFull: Electrical energy
        Type: general
      – SubjectFull: Photovoltaic power systems
        Type: general
      – SubjectFull: Electric power distribution grids
        Type: general
    Titles:
      – TitleFull: Model-Free Predictive Current Control of a 3-φ Grid-Connected Neutral-Point-Clamped Transformerless Inverter.
        Type: main
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            NameFull: Zaid, Sherif A.
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            NameFull: Bakeer, Abualkasim
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            NameFull: Albalawi, Hani
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            NameFull: Alatwi, Adel M.
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            NameFull: Abdeldaim, Hassan
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              M: 04
              Text: Apr2023
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              Y: 2023
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