Model-Free Predictive Current Control of a 3-φ Grid-Connected Neutral-Point-Clamped Transformerless Inverter
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 re...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/16/7/3141 |
| _version_ | 1797608050411962368 |
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| author | Sherif A. Zaid Abualkasim Bakeer Hani Albalawi Adel M. Alatwi Hassan Abdeldaim Bassel Manqarah |
| author_facet | Sherif A. Zaid Abualkasim Bakeer Hani Albalawi Adel M. Alatwi Hassan Abdeldaim Bassel Manqarah |
| author_sort | Sherif A. Zaid |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-11T05:38:04Z |
| format | Article |
| id | doaj.art-ba74ea9af6394c7598133917be8bac41 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-11T05:38:04Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-ba74ea9af6394c7598133917be8bac412023-11-17T16:38:02ZengMDPI AGEnergies1996-10732023-03-01167314110.3390/en16073141Model-Free Predictive Current Control of a 3-φ Grid-Connected Neutral-Point-Clamped Transformerless InverterSherif A. Zaid0Abualkasim Bakeer1Hani Albalawi2Adel M. Alatwi3Hassan Abdeldaim4Bassel Manqarah5Electrical Engineering Department, Faculty of Engineering, University of Tabuk, Tabuk 47913, Saudi ArabiaElectrical Engineering Department, Faculty of Engineering, Aswan University, Aswan 81542, EgyptElectrical Engineering Department, Faculty of Engineering, University of Tabuk, Tabuk 47913, Saudi ArabiaElectrical Engineering Department, Faculty of Engineering, University of Tabuk, Tabuk 47913, Saudi ArabiaElectrical Engineering Department, Faculty of Engineering, University of Tabuk, Tabuk 47913, Saudi ArabiaElectrical Engineering Department, Faculty of Engineering, University of Tabuk, Tabuk 47913, Saudi ArabiaUtility 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.https://www.mdpi.com/1996-1073/16/7/3141MPPTtransformerless inverterNPCmodel-free predictive controlPV |
| spellingShingle | Sherif A. Zaid Abualkasim Bakeer Hani Albalawi Adel M. Alatwi Hassan Abdeldaim Bassel Manqarah Model-Free Predictive Current Control of a 3-φ Grid-Connected Neutral-Point-Clamped Transformerless Inverter Energies MPPT transformerless inverter NPC model-free predictive control PV |
| title | Model-Free Predictive Current Control of a 3-φ Grid-Connected Neutral-Point-Clamped Transformerless Inverter |
| title_full | Model-Free Predictive Current Control of a 3-φ Grid-Connected Neutral-Point-Clamped Transformerless Inverter |
| title_fullStr | Model-Free Predictive Current Control of a 3-φ Grid-Connected Neutral-Point-Clamped Transformerless Inverter |
| title_full_unstemmed | Model-Free Predictive Current Control of a 3-φ Grid-Connected Neutral-Point-Clamped Transformerless Inverter |
| title_short | Model-Free Predictive Current Control of a 3-φ Grid-Connected Neutral-Point-Clamped Transformerless Inverter |
| title_sort | model free predictive current control of a 3 φ grid connected neutral point clamped transformerless inverter |
| topic | MPPT transformerless inverter NPC model-free predictive control PV |
| url | https://www.mdpi.com/1996-1073/16/7/3141 |
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