汪朔,赵子康,赵晋泉,赵子辰,杨胜春
WANG Shuo,ZHAO Zikang,ZHAO Jinquan,ZHAO Zichen,YANG Shengchun

• 1:上海电力大学电气工程学部
• 2:中国电力科学研究院有限公司

摘要(Abstract)：

为应对高比例新能源接入下电网暂态电压稳定与频率安全裕度下降的问题，提出了一种考虑暂态电压稳定和频率安全的机组组合优化方法。首先，建立电网样本库，提取影响暂态电压稳定的稳态特征，并通过批量时域仿真获得相应的暂态特征。然后，基于符号回归对关键特征变量进行系数拟合，构建具备模型可嵌入性的暂态电压稳定约束；同时，根据频率变化率约束、频率最低点约束和准稳态频率约束构建频率安全约束，并将上述两种约束嵌入机组组合以实现启停方案的快速求解。最后，基于改进IEEE 39节点算例进行仿真分析，结果表明，所提方法能够提升电网稳定裕度，保障电网安全稳定运行。
To address the decline in transient voltage stability and frequency security margins caused by the high penetration of renewable energy, this paper presents an optimized unit commitment(UC) method that incorporates both transient voltage stability and frequency security. First, a grid sample database is established to extract steadystate features that influence transient voltage stability, with corresponding transient characteristics obtained through batch time-domain simulations. Subsequently, symbolic regression is applied to perform coefficient fitting on key feature variables, thereby constructing transient voltage stability constraints suitable for model embedding. Then, frequency security constraints are formulated based on the rate of change of frequency(RoCoF), frequency nadir, and quasi-steady-state frequency boundaries. These two sets of stability constraints are then embedded into the UC framework to enable a computationally efficient solution for unit start-stop schedules. Finally, simulation analysis based on a modified IEEE 39-bus system demonstrates that the proposed method effectively enhances the stability margins of the grid and guarantees its secure and stable operation.

关键词(KeyWords)： 机组组合;暂态电压稳定;频率安全;符号回归;数据驱动
unit commitment;transient voltage stability;frequency security;symbolic regression;data-driven

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金（2026ZD0809500）

作者(Author): 汪朔,赵子康,赵晋泉,赵子辰,杨胜春
WANG Shuo,ZHAO Zikang,ZHAO Jinquan,ZHAO Zichen,YANG Shengchun

DOI: 10.19585/j.zjdl.202610002

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