Robust Control Delay Compensation Method for Grid Connected Inverter Based on Improved Newton Interpolation
The LCL grid-connected inverter makes extensive use of capacitive current feedback active damping because of its good resonance peak suppression performance. However, the existence of control delay under digital control weakens the effect, resulting in possible instability of the system. To enhance...
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| Format: | Article |
| Language: | English |
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China electric power research institute
2025-01-01
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| Series: | CSEE Journal of Power and Energy Systems |
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| Online Access: | https://ieeexplore.ieee.org/document/9878013/ |
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| author | Jianwen Li Xiaotang Ma Binyuan Wu Rong Li Ruiqing Yang |
| author_facet | Jianwen Li Xiaotang Ma Binyuan Wu Rong Li Ruiqing Yang |
| author_sort | Jianwen Li |
| collection | DOAJ |
| description | The LCL grid-connected inverter makes extensive use of capacitive current feedback active damping because of its good resonance peak suppression performance. However, the existence of control delay under digital control weakens the effect, resulting in possible instability of the system. To enhance the robustness of capacitive current feedback control, a delay compensation strategy for an LCL grid-connected inverter is proposed in this paper. The strategy uses the improved Newton interpolation to predict the actual control signal, which is equivalent to providing the leading phase for the forward channel of grid connected current loop. In such way, it can maintain the effectiveness of inverter active damping and strengthen the stability of the system. Furthermore, compared with the traditional Newton interpolation delay compensation, the proposed strategy integrates the computation delay and pulse width modulation delay, thus expanding the control delay compensation range. The under compensation problem caused by limited compensation ability can be avoided. Finally, simulations and experiments confirm the effectiveness of this proposed control strategy. |
| format | Article |
| id | doaj-art-e910a56822b04b07a36e7609293c98ce |
| institution | OA Journals |
| issn | 2096-0042 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | China electric power research institute |
| record_format | Article |
| series | CSEE Journal of Power and Energy Systems |
| spelling | doaj-art-e910a56822b04b07a36e7609293c98ce2025-08-20T02:27:16ZengChina electric power research instituteCSEE Journal of Power and Energy Systems2096-00422025-01-0111278379210.17775/CSEEJPES.2021.072309878013Robust Control Delay Compensation Method for Grid Connected Inverter Based on Improved Newton InterpolationJianwen Li0Xiaotang Ma1Binyuan Wu2Rong Li3Ruiqing Yang4North China Electric Power University,Baoding,China,071000North China Electric Power University,Baoding,China,071000North China Electric Power University,Baoding,China,071000North China Electric Power University,Baoding,China,071000North China Electric Power University,Baoding,China,071000The LCL grid-connected inverter makes extensive use of capacitive current feedback active damping because of its good resonance peak suppression performance. However, the existence of control delay under digital control weakens the effect, resulting in possible instability of the system. To enhance the robustness of capacitive current feedback control, a delay compensation strategy for an LCL grid-connected inverter is proposed in this paper. The strategy uses the improved Newton interpolation to predict the actual control signal, which is equivalent to providing the leading phase for the forward channel of grid connected current loop. In such way, it can maintain the effectiveness of inverter active damping and strengthen the stability of the system. Furthermore, compared with the traditional Newton interpolation delay compensation, the proposed strategy integrates the computation delay and pulse width modulation delay, thus expanding the control delay compensation range. The under compensation problem caused by limited compensation ability can be avoided. Finally, simulations and experiments confirm the effectiveness of this proposed control strategy.https://ieeexplore.ieee.org/document/9878013/Control delayNewton interpolationstability |
| spellingShingle | Jianwen Li Xiaotang Ma Binyuan Wu Rong Li Ruiqing Yang Robust Control Delay Compensation Method for Grid Connected Inverter Based on Improved Newton Interpolation CSEE Journal of Power and Energy Systems Control delay Newton interpolation stability |
| title | Robust Control Delay Compensation Method for Grid Connected Inverter Based on Improved Newton Interpolation |
| title_full | Robust Control Delay Compensation Method for Grid Connected Inverter Based on Improved Newton Interpolation |
| title_fullStr | Robust Control Delay Compensation Method for Grid Connected Inverter Based on Improved Newton Interpolation |
| title_full_unstemmed | Robust Control Delay Compensation Method for Grid Connected Inverter Based on Improved Newton Interpolation |
| title_short | Robust Control Delay Compensation Method for Grid Connected Inverter Based on Improved Newton Interpolation |
| title_sort | robust control delay compensation method for grid connected inverter based on improved newton interpolation |
| topic | Control delay Newton interpolation stability |
| url | https://ieeexplore.ieee.org/document/9878013/ |
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