| 引用本文: | 朱介北,李丰地,陈彬彬,等.基于功率灵敏度分析的嵌入式VSC-HVDC过载紧急控制方法[J].电力系统保护与控制,2026,54(04):50-61.[点击复制] |
| ZHU Jiebei,LI Fengdi,CHEN Binbin,et al.Power sensitivity analysis-based embedded VSC-HVDC overload emergency control[J].Power System Protection and Control,2026,54(04):50-61[点击复制] |
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| 摘要: |
| 高比例、强随机性的可再生能源接入电网常导致交流传输线路过载，同时电力系统升级改造中构建的嵌入式柔性直流输电(voltage source converter based high voltage direct current, VSC-HVDC)系统的可控性没有得到充分利用。为此提出了一种基于功率灵敏度的嵌入式VSC-HVDC紧急控制方法，以快速缓解传输线路过载问题。首先，利用系统模型建立包含嵌入式VSC-HVDC的交流-直流功率灵敏度矩阵。然后，在实时运行中根据推导的灵敏度矩阵调整VSC-HVDC的有功功率，以应对特定的交流电网过载。在调整过程中，采用优化控制方法确保直流调整的总量最小化，同时交流线路有功功率保持在可接受的范围内。最后，通过修改的IEEE39节点系统仿真验证了该方法在多种故障工况下的有效性，可快速缓解交流线路过载并保证全网运行安全。 |
| 关键词: 线路过负荷 功率灵敏度 紧急控制 嵌入式直流输电 柔性直流输电 |
| DOI：10.19783/j.cnki.pspc.250410 |
| 投稿时间：2025-04-16修订日期：2025-08-21 |
| 基金项目:国家自然科学基金联合基金项目资助(U23B20123)；智能电网国家科技重大专项资助(2025ZD0806800) |
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| Power sensitivity analysis-based embedded VSC-HVDC overload emergency control |
| ZHU Jiebei,LI Fengdi,CHEN Binbin,YU Lujie,LI Bin |
| (School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China) |
| Abstract: |
| The large-scale integration of renewable energy sources with high penetration levels and strong randomness often leads to overloading of AC transmission lines. Meanwhile, in power system upgrading and construction, the controllability of the embedded voltage source converter-based high voltage direct current (VSC-HVDC) systems has not been fully exploited. To address this issue, this paper proposes a power sensitivity analysis-based embedded VSC-HVDC emergency control (SEC) to mitigate transmission overloading. First, an AC-DC power sensitivity matrix incorporating embedded VSC-HVDC is established based on the system model. Then, during real-time operation, the active power of the VSC-HVDC is adjusted to address specific AC grid overloading according to the derived sensitivity matrix. During the adjustment process, an optimization-based control method is used to minimize the total variation in DC adjustment while keeping the active power of AC transmission lines within acceptable limits. Finally, simulation verification is carried out using a modified IEEE benchmark 39-bus system, demonstrating that the proposed SEC can address AC grid overloading under various grid fault scenarios and ensure the safe operation of the entire network. |
| Key words: line overload power sensitivity emergency control embedded HVDC VSC-HVDC |
