Voltage Unbalance Control Strategy for Local Shading Photovoltaic Grid-Connected System
In view of the sudden grid voltage distortions, such as voltage sags and unbalances, that may occur in photovoltaic (PV) grid-connected systems under local shading conditions, this paper proposes a control strategy integrating a linear active disturbance rejection controller (LADRC)-based virtual sy...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-01-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/18/3/554 |
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| author | Pingye Wan Miao Huang Jinshan Mou Lili Tao Shuping Zhang Zhihua Hu |
| author_facet | Pingye Wan Miao Huang Jinshan Mou Lili Tao Shuping Zhang Zhihua Hu |
| author_sort | Pingye Wan |
| collection | DOAJ |
| description | In view of the sudden grid voltage distortions, such as voltage sags and unbalances, that may occur in photovoltaic (PV) grid-connected systems under local shading conditions, this paper proposes a control strategy integrating a linear active disturbance rejection controller (LADRC)-based virtual synchronous generator (VSG) and an active disturbance rejection controller (ADRC)-based dynamic voltage restorer (DVR). To enhance the stability and response speed of the PV inverter system, a novel LADRC-based voltage–current dual closed-loop control strategy with pre-synchronization is designed, ensuring stable operation of the inverter and load. To address the overshooting issues found in traditional PI control under local shading, the ADRC-based DVR compensates for PV system voltage fluctuations, achieving rapid voltage distortion compensation and ensuring grid-connected system safety. Simulink experiments verify the feasibility and effectiveness of the proposed control strategy in improving transient voltage quality in PV systems affected by local shading. The total harmonic distortion rates of voltage and current are both less than 0.5%, which significantly improves the performance compared to existing research. |
| format | Article |
| id | doaj-art-e5d9568bd1c04ef786d433c7d2b24f98 |
| institution | DOAJ |
| issn | 1996-1073 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj-art-e5d9568bd1c04ef786d433c7d2b24f982025-08-20T03:12:35ZengMDPI AGEnergies1996-10732025-01-0118355410.3390/en18030554Voltage Unbalance Control Strategy for Local Shading Photovoltaic Grid-Connected SystemPingye Wan0Miao Huang1Jinshan Mou2Lili Tao3Shuping Zhang4Zhihua Hu5School of Intelligent Manufacturing and Control Engineering, Shanghai Polytechnic University, Shanghai 201209, ChinaSchool of Intelligent Manufacturing and Control Engineering, Shanghai Polytechnic University, Shanghai 201209, ChinaShanghai Energy Technology Development Co., Ltd., Shanghai 200233, ChinaSchool of Intelligent Manufacturing and Control Engineering, Shanghai Polytechnic University, Shanghai 201209, ChinaSchool of Intelligent Manufacturing and Control Engineering, Shanghai Polytechnic University, Shanghai 201209, ChinaSchool of Intelligent Manufacturing and Control Engineering, Shanghai Polytechnic University, Shanghai 201209, ChinaIn view of the sudden grid voltage distortions, such as voltage sags and unbalances, that may occur in photovoltaic (PV) grid-connected systems under local shading conditions, this paper proposes a control strategy integrating a linear active disturbance rejection controller (LADRC)-based virtual synchronous generator (VSG) and an active disturbance rejection controller (ADRC)-based dynamic voltage restorer (DVR). To enhance the stability and response speed of the PV inverter system, a novel LADRC-based voltage–current dual closed-loop control strategy with pre-synchronization is designed, ensuring stable operation of the inverter and load. To address the overshooting issues found in traditional PI control under local shading, the ADRC-based DVR compensates for PV system voltage fluctuations, achieving rapid voltage distortion compensation and ensuring grid-connected system safety. Simulink experiments verify the feasibility and effectiveness of the proposed control strategy in improving transient voltage quality in PV systems affected by local shading. The total harmonic distortion rates of voltage and current are both less than 0.5%, which significantly improves the performance compared to existing research.https://www.mdpi.com/1996-1073/18/3/554local shadingphotovoltaic grid connectiondynamic voltage restorervirtual synchronous generator |
| spellingShingle | Pingye Wan Miao Huang Jinshan Mou Lili Tao Shuping Zhang Zhihua Hu Voltage Unbalance Control Strategy for Local Shading Photovoltaic Grid-Connected System Energies local shading photovoltaic grid connection dynamic voltage restorer virtual synchronous generator |
| title | Voltage Unbalance Control Strategy for Local Shading Photovoltaic Grid-Connected System |
| title_full | Voltage Unbalance Control Strategy for Local Shading Photovoltaic Grid-Connected System |
| title_fullStr | Voltage Unbalance Control Strategy for Local Shading Photovoltaic Grid-Connected System |
| title_full_unstemmed | Voltage Unbalance Control Strategy for Local Shading Photovoltaic Grid-Connected System |
| title_short | Voltage Unbalance Control Strategy for Local Shading Photovoltaic Grid-Connected System |
| title_sort | voltage unbalance control strategy for local shading photovoltaic grid connected system |
| topic | local shading photovoltaic grid connection dynamic voltage restorer virtual synchronous generator |
| url | https://www.mdpi.com/1996-1073/18/3/554 |
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