Coordinated Control Strategies for Enhancing Frequency Stability of Photovoltaic and Storage Networking Systems
[Objective] To cope with the frequency stability problems caused by the low inertia and weak damping of new power systems with an increasing proportion of new energy installations and to ensure the stable operation of the power system，a coordinated control strategy for the active frequency support o...
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Editorial Department of Electric Power Construction
2025-08-01
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| Series: | Dianli jianshe |
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| Online Access: | https://www.cepc.com.cn/fileup/1000-7229/PDF/1753435498149-1596327943.pdf |
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| author | JIANG Shouqi, ZHANG Haifeng, FU Gui, XIN Yechun, WANG Lixin |
| author_facet | JIANG Shouqi, ZHANG Haifeng, FU Gui, XIN Yechun, WANG Lixin |
| author_sort | JIANG Shouqi, ZHANG Haifeng, FU Gui, XIN Yechun, WANG Lixin |
| collection | DOAJ |
| description | [Objective] To cope with the frequency stability problems caused by the low inertia and weak damping of new power systems with an increasing proportion of new energy installations and to ensure the stable operation of the power system，a coordinated control strategy for the active frequency support of a photovoltaic storage grid-connected system with the participation of multiple subjects is proposed to meet the frequency regulation requirements under different operating conditions of the photovoltaic systems configured with energy storage. [Methods] The proposed method analyzes the frequency regulation demand of the system under different operating conditions according to the power regulation margin and unbalanced power of the synchronous machine and designs a self-synchronous control strategy for the grid-connected inverter that transmits the frequency change information while proactively supporting inertia. It proposes a multi-timescale frequency regulation control strategy for a photovoltaic storage system that considers the dead zone of the frequency regulation. The proposed method designs the value of the dead zone of the photovoltaic frequency regulation based on the power regulation margin of the synchronous machine and designs its control parameter and self-service control strategy based on the storage state of the energy charge. It designs the control parameters and adaptive recovery strategy based on the power regulation margin of the synchronous machine. [Results] The real-time digital simulation results of the grid-connected photovoltaic storage system showed that compared with the frequency regulation effect under the existing control method，the proposed control strategy could improve the frequency minimum point by more than 10% under different disturbing conditions，significantly improving the frequency regulation performance of the system. [Conclusions] The proposed coordinated control strategy of frequency active support for a grid-connected optical storage system with the participation of multiple subjects enables the optical storage system to have the adaptive switching function of inertia support and primary frequency regulation under different disturbing conditions，giving full play to the frequency regulation capability of the synchronous machine while ensuring the frequency stability of the system. Simultaneously，the energy storage adaptively recovers to the initial operating state，effectively improving the frequency stability of the system under different operating conditions. |
| format | Article |
| id | doaj-art-56bc1ed76c824f26b5e820964cf78441 |
| institution | DOAJ |
| issn | 1000-7229 |
| language | zho |
| publishDate | 2025-08-01 |
| publisher | Editorial Department of Electric Power Construction |
| record_format | Article |
| series | Dianli jianshe |
| spelling | doaj-art-56bc1ed76c824f26b5e820964cf784412025-08-20T03:13:40ZzhoEditorial Department of Electric Power ConstructionDianli jianshe1000-72292025-08-0146813814910.12204/j.issn.1000-7229.2025.08.013Coordinated Control Strategies for Enhancing Frequency Stability of Photovoltaic and Storage Networking SystemsJIANG Shouqi, ZHANG Haifeng, FU Gui, XIN Yechun, WANG Lixin01. Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology，Ministry of Education（Northeast Electric Power University），Jilin 132012，Jilin Province，China;2. State Grid Jilin Electric Power Company Jilin Power Supply Company，Jilin 132011，Jilin Province，China[Objective] To cope with the frequency stability problems caused by the low inertia and weak damping of new power systems with an increasing proportion of new energy installations and to ensure the stable operation of the power system，a coordinated control strategy for the active frequency support of a photovoltaic storage grid-connected system with the participation of multiple subjects is proposed to meet the frequency regulation requirements under different operating conditions of the photovoltaic systems configured with energy storage. [Methods] The proposed method analyzes the frequency regulation demand of the system under different operating conditions according to the power regulation margin and unbalanced power of the synchronous machine and designs a self-synchronous control strategy for the grid-connected inverter that transmits the frequency change information while proactively supporting inertia. It proposes a multi-timescale frequency regulation control strategy for a photovoltaic storage system that considers the dead zone of the frequency regulation. The proposed method designs the value of the dead zone of the photovoltaic frequency regulation based on the power regulation margin of the synchronous machine and designs its control parameter and self-service control strategy based on the storage state of the energy charge. It designs the control parameters and adaptive recovery strategy based on the power regulation margin of the synchronous machine. [Results] The real-time digital simulation results of the grid-connected photovoltaic storage system showed that compared with the frequency regulation effect under the existing control method，the proposed control strategy could improve the frequency minimum point by more than 10% under different disturbing conditions，significantly improving the frequency regulation performance of the system. [Conclusions] The proposed coordinated control strategy of frequency active support for a grid-connected optical storage system with the participation of multiple subjects enables the optical storage system to have the adaptive switching function of inertia support and primary frequency regulation under different disturbing conditions，giving full play to the frequency regulation capability of the synchronous machine while ensuring the frequency stability of the system. Simultaneously，the energy storage adaptively recovers to the initial operating state，effectively improving the frequency stability of the system under different operating conditions.https://www.cepc.com.cn/fileup/1000-7229/PDF/1753435498149-1596327943.pdfphotovoltaic and energy storage grid-connected system|self-synchronization|inertia support|primary frequency regulation|frequency stability |
| spellingShingle | JIANG Shouqi, ZHANG Haifeng, FU Gui, XIN Yechun, WANG Lixin Coordinated Control Strategies for Enhancing Frequency Stability of Photovoltaic and Storage Networking Systems Dianli jianshe photovoltaic and energy storage grid-connected system|self-synchronization|inertia support|primary frequency regulation|frequency stability |
| title | Coordinated Control Strategies for Enhancing Frequency Stability of Photovoltaic and Storage Networking Systems |
| title_full | Coordinated Control Strategies for Enhancing Frequency Stability of Photovoltaic and Storage Networking Systems |
| title_fullStr | Coordinated Control Strategies for Enhancing Frequency Stability of Photovoltaic and Storage Networking Systems |
| title_full_unstemmed | Coordinated Control Strategies for Enhancing Frequency Stability of Photovoltaic and Storage Networking Systems |
| title_short | Coordinated Control Strategies for Enhancing Frequency Stability of Photovoltaic and Storage Networking Systems |
| title_sort | coordinated control strategies for enhancing frequency stability of photovoltaic and storage networking systems |
| topic | photovoltaic and energy storage grid-connected system|self-synchronization|inertia support|primary frequency regulation|frequency stability |
| url | https://www.cepc.com.cn/fileup/1000-7229/PDF/1753435498149-1596327943.pdf |
| work_keys_str_mv | AT jiangshouqizhanghaifengfuguixinyechunwanglixin coordinatedcontrolstrategiesforenhancingfrequencystabilityofphotovoltaicandstoragenetworkingsystems |