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| Quantification of active power regulation space and real-time control for multi-type resources considering active power-voltage coupling in weakly supported DC transmission systems |
| DOI：10.19783/j.cnki.pspc.250652 |
| Key Words:weakly supported HVDC transmission systems automatic generation control active power adjustment space real-time active power control |
| Author Name | Affiliation | | LI Guoqing1 | 1. Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology, Ministry of Education
(Northeast Electric Power University), Jilin 132012, China
2. State Grid Gansu Electric Power Company, Lanzhou 730030, China
3. Electric Power Research Institute, State Grid Gansu Electric Power Company, Lanzhou 730000, China | | SUN Heyang1 | 1. Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology, Ministry of Education
(Northeast Electric Power University), Jilin 132012, China
2. State Grid Gansu Electric Power Company, Lanzhou 730030, China
3. Electric Power Research Institute, State Grid Gansu Electric Power Company, Lanzhou 730000, China | | HAN Jiexiang2 | 1. Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology, Ministry of Education
(Northeast Electric Power University), Jilin 132012, China
2. State Grid Gansu Electric Power Company, Lanzhou 730030, China
3. Electric Power Research Institute, State Grid Gansu Electric Power Company, Lanzhou 730000, China | | NIU Zhen3 | 1. Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology, Ministry of Education
(Northeast Electric Power University), Jilin 132012, China
2. State Grid Gansu Electric Power Company, Lanzhou 730030, China
3. Electric Power Research Institute, State Grid Gansu Electric Power Company, Lanzhou 730000, China | | JIANG Shouqi1 | 1. Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology, Ministry of Education
(Northeast Electric Power University), Jilin 132012, China
2. State Grid Gansu Electric Power Company, Lanzhou 730030, China
3. Electric Power Research Institute, State Grid Gansu Electric Power Company, Lanzhou 730000, China | | XIN Yechun1 | 1. Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology, Ministry of Education
(Northeast Electric Power University), Jilin 132012, China
2. State Grid Gansu Electric Power Company, Lanzhou 730030, China
3. Electric Power Research Institute, State Grid Gansu Electric Power Company, Lanzhou 730000, China |
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| Abstract:In DC transmission systems exporting power from weakly supported renewable energy bases, characteristics such as low inertia, weak damping, and low short-circuit ratio become prominent. Strong coupling between active power and voltage exists, making conventional real-time active power control modes difficult to apply. To address this issue, this paper proposes a real-time active power control method that simultaneously considers static voltage security constraints and the effective regulation space of multi-type resources, ensuring system stability while optimizing resource utilization. First, the coupling mechanism is analyzed, and a sensitivity index is established to quantify coupling degrees under different operating conditions. Then, considering renewable energy uncertainty, a voltage weak point identification method based on probabilistic power flow is proposed by integrating impedance modulus margin. By analyzing the effects of active power outputs of different types of resources on weak-point voltages, a method for quantifying the active power regulation space of multi-type resources under static voltage security constraints is developed. Then, integrating active power-voltage sensitivity and the effective regulation space of multi-type resources, a real-time active power control strategy is designed that accounts for regulation resource selection and differentiated power allocation, thereby meeting active power regulation requirements while reducing adverse impacts on weak-point voltages. Finally, the effectiveness of the proposed method is validated through case studies based on a modified IEEE 30-bus system. |
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