Robust Suppression Strategy for Photovoltaic Grid-Connected Inverter Cluster Resonance Based on Kalman Filter Improved Disturbance Observer
In response to the key engineering problems of photovoltaic grid-connected inverter cluster resonance suppression affected by grid-connected inverter impedance, in this paper, a control strategy based on a disturbance observer is proposed to dynamically compensate for the damping coefficient of the...
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MDPI AG
2022-10-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/15/21/7942 |
| _version_ | 1797468415159435264 |
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| author | Guofeng He Cheng Yan Zichun Zhou Junfang Lin Guojiao Li |
| author_facet | Guofeng He Cheng Yan Zichun Zhou Junfang Lin Guojiao Li |
| author_sort | Guofeng He |
| collection | DOAJ |
| description | In response to the key engineering problems of photovoltaic grid-connected inverter cluster resonance suppression affected by grid-connected inverter impedance, in this paper, a control strategy based on a disturbance observer is proposed to dynamically compensate for the damping coefficient of the controlled system and improve the robustness of the system. First, an engineering mathematical model of a 200 MW photovoltaic inverter cluster is established, and the mechanism of the active damping of the cluster inverter influenced by the disturbance is analyzed. Secondly, the capacitor current feedback is utilized to constitute the virtual damping, and the inverter output impedance is reshaped to suppress the resonance peak. Then, a Kalman filter is used to improve the traditional disturbance observer to accurately detect disturbance of the system during the dynamic process of the cluster inverter so as to better adapt to changes in grid impedance and dynamically compensate for the virtual damping of the cluster resonant system. Finally, the proposed control strategy is verified with respect to a practical PV power station. The experimental results demonstrate the feasibility of the proposed control method. |
| first_indexed | 2024-03-09T19:07:08Z |
| format | Article |
| id | doaj.art-1d479225785f4308a8e85b8e69abaf3e |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T19:07:08Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
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| series | Energies |
| spelling | doaj.art-1d479225785f4308a8e85b8e69abaf3e2023-11-24T04:29:17ZengMDPI AGEnergies1996-10732022-10-011521794210.3390/en15217942Robust Suppression Strategy for Photovoltaic Grid-Connected Inverter Cluster Resonance Based on Kalman Filter Improved Disturbance ObserverGuofeng He0Cheng Yan1Zichun Zhou2Junfang Lin3Guojiao Li4School of Electrical and Control Engineering, Henan University of Urban Construction, Pingdingshan 467036, ChinaNingbo Deye Technology Co., Ltd., Ningbo 315803, ChinaSchool of Electrical and Control Engineering, Henan University of Urban Construction, Pingdingshan 467036, ChinaSchool of Electrical and Control Engineering, Henan University of Urban Construction, Pingdingshan 467036, ChinaSchool of Electrical and Control Engineering, Henan University of Urban Construction, Pingdingshan 467036, ChinaIn response to the key engineering problems of photovoltaic grid-connected inverter cluster resonance suppression affected by grid-connected inverter impedance, in this paper, a control strategy based on a disturbance observer is proposed to dynamically compensate for the damping coefficient of the controlled system and improve the robustness of the system. First, an engineering mathematical model of a 200 MW photovoltaic inverter cluster is established, and the mechanism of the active damping of the cluster inverter influenced by the disturbance is analyzed. Secondly, the capacitor current feedback is utilized to constitute the virtual damping, and the inverter output impedance is reshaped to suppress the resonance peak. Then, a Kalman filter is used to improve the traditional disturbance observer to accurately detect disturbance of the system during the dynamic process of the cluster inverter so as to better adapt to changes in grid impedance and dynamically compensate for the virtual damping of the cluster resonant system. Finally, the proposed control strategy is verified with respect to a practical PV power station. The experimental results demonstrate the feasibility of the proposed control method.https://www.mdpi.com/1996-1073/15/21/7942cluster resonancedamping coefficientdisturbance observergrid-connected inverterrobustness |
| spellingShingle | Guofeng He Cheng Yan Zichun Zhou Junfang Lin Guojiao Li Robust Suppression Strategy for Photovoltaic Grid-Connected Inverter Cluster Resonance Based on Kalman Filter Improved Disturbance Observer Energies cluster resonance damping coefficient disturbance observer grid-connected inverter robustness |
| title | Robust Suppression Strategy for Photovoltaic Grid-Connected Inverter Cluster Resonance Based on Kalman Filter Improved Disturbance Observer |
| title_full | Robust Suppression Strategy for Photovoltaic Grid-Connected Inverter Cluster Resonance Based on Kalman Filter Improved Disturbance Observer |
| title_fullStr | Robust Suppression Strategy for Photovoltaic Grid-Connected Inverter Cluster Resonance Based on Kalman Filter Improved Disturbance Observer |
| title_full_unstemmed | Robust Suppression Strategy for Photovoltaic Grid-Connected Inverter Cluster Resonance Based on Kalman Filter Improved Disturbance Observer |
| title_short | Robust Suppression Strategy for Photovoltaic Grid-Connected Inverter Cluster Resonance Based on Kalman Filter Improved Disturbance Observer |
| title_sort | robust suppression strategy for photovoltaic grid connected inverter cluster resonance based on kalman filter improved disturbance observer |
| topic | cluster resonance damping coefficient disturbance observer grid-connected inverter robustness |
| url | https://www.mdpi.com/1996-1073/15/21/7942 |
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