| 引用本文: | 孙正龙,刘 勇,陈威翰,等.计及预案式失配冲击的响应驱动频率稳定紧急切负荷策略[J].电力系统保护与控制,2026,54(01):117-129.[点击复制] |
| SUN Zhenglong,LIU Yong,CHEN Weihan,et al.Response-driven emergency load-shedding strategy for frequency stability considering mismatch impacts of pre-planned schemes[J].Power System Protection and Control,2026,54(01):117-129[点击复制] |
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| 摘要: |
| 在新型电力系统复杂工况下，以策略表为主体、通过“离线仿真、在线匹配”的预案式频率稳定控制方案存在较高失配风险，甚至因调控失当引发二次冲击，严重威胁电力系统的安全稳定运行。提出一种计及预案式失配冲击的响应驱动频率稳定紧急切负荷策略。该策略动作在预案式控制之后，是对预案式控制的有益补充，能够有效提升系统频率稳定性。首先建立了基于系统频率响应(system frequency response, SFR)模型辨识的频率稳定切负荷量计算方法。提出了基于频率稀疏量测的SFR模型辨识方法，在此基础上建立了含稳定控制的SFR模型，根据频率稳定控制目标迭代求解切负荷量。其次，建立了基于Transformer网络的频率控制敏感点挖掘模型，通过分析关键发电机母线节点频率时序值和频率控制敏感点的映射关系，实现响应驱动的频率控制敏感点在线挖掘。最后，按照敏感点排序快速分配控制措施总量，构建频率稳定紧急控制方案。在某实际交直流混联万节点仿真系统验证了所提方法的有效性。 |
| 关键词: 预案式控制 频率稳定 紧急控制 频率响应模型 Transformer |
| DOI：10.19783/j.cnki.pspc.250155 |
| 投稿时间：2025-02-18修订日期：2025-07-15 |
| 基金项目:智能电网重大专项(2030)资助(2024ZD0801000)；国网浙江省电力有限公司科技项目资助(B311DS25000A) |
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| Response-driven emergency load-shedding strategy for frequency stability considering mismatch impacts of pre-planned schemes |
| SUN Zhenglong1,LIU Yong1,CHEN Weihan1,ZHANG Rui1,LIU Cheng1,HUA Wen2,ZHANG Chengming2,CAI Guowei1 |
| (1. School of Electrical Engineering, Northeast Electric Power University, Jilin 132012, China;
2. State Grid Zhejiang Electric Power Research Institute, Hangzhou 310014, China) |
| Abstract: |
| Under complex operating conditions in modern power systems, pre-planned frequency stability control schemes based on strategy tables and implemented through an “offline simulation-online matching” paradigm are subject to a high risk of mismatch. Inappropriate control actions may even trigger secondary disturbances, posing a serious threat to the safe and stable operation of power systems. To address this issue, a response-driven emergency load shedding strategy for frequency stability considering the mismatch impacts of pre-planned schemes is proposed. This strategy is executed after the pre-planned control actions and serves as an effective supplement to them, significantly enhancing system frequency stability. First, a method for calculating the required load shedding amount for frequency stability based on system frequency response (SFR) model identification is established. A sparse frequency measurement-based SFR model identification approach is proposed, upon which an SFR model incorporating stability control is established, and the load shedding amount is iteratively solved according to frequency stability control objectives. Second, a frequency control sensitivity point mining model based on a Transformer network is constructed. By analyzing the mapping relationship between frequency time-series data of key generator bus nodes and frequency control sensitivity points, response-driven online identification of frequency control sensitivity points is achieved. Finally, the total control action is rapidly allocated according to the ranking of sensitive points to construct an emergency frequency stability control scheme. The effectiveness of the proposed method is verified on a practical large-scale AC/DC hybrid power system with tens of thousands of nodes. |
| Key words: pre-planned control frequency stability emergency control frequency response model Transformer |
