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1.现代电力系统仿真控制与绿色电能新技术教育部重点实验室(东北电力大学),吉林省吉林市 132012
2.国网齐齐哈尔供电公司,黑龙江省齐齐哈尔市 161005
3.云南电网有限责任公司西双版纳供电局,云南省西双版纳傣族自治州景洪市 666100
Received:28 January 2023,
Revised:2023-07-19,
Published Online:24 January 2024,
Published:25 May 2024
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王博,王宇,张颂等.基于随机数据驱动SDMD的电力系统区域惯量评估方法[J].电力系统自动化,2024,48(10):78-86.
WANG Bo,WANG Yu,ZHANG Song,et al.Regional Inertia Estimation Method for Power System Based on Random Data-driven Subspace Dynamic Mode Decomposition[J].Automation of Electric Power Systems,2024,48(10):78-86.
王博,王宇,张颂等.基于随机数据驱动SDMD的电力系统区域惯量评估方法[J].电力系统自动化,2024,48(10):78-86. DOI: 10.7500/AEPS20230128001.
WANG Bo,WANG Yu,ZHANG Song,et al.Regional Inertia Estimation Method for Power System Based on Random Data-driven Subspace Dynamic Mode Decomposition[J].Automation of Electric Power Systems,2024,48(10):78-86. DOI: 10.7500/AEPS20230128001.
准确评估系统惯量对于支持未来低惯量电力系统的系统安全运行至关重要。文中提出了一种随机数据驱动下基于机电响应特征的系统惯量评估方法,从随机响应信号中实现了区域有效惯量的评估。首先,通过将随机Koopman理论与随机动态系统相结合,推导出了随机Koopman空间上机电特征与系统惯量的耦合关系。然后,利用子空间动态模式分解(SDMD),以数据驱动的方式提取系统机电响应特征。该算法通过正交投影和奇异值分解,在压缩数据的同时实现了系统状态矩阵的低秩近似,可以有效减弱观测噪声对计算结果的影响。最后,采用IEEE 4机2区系统和IEEE 10机39节点系统的数值模拟算例验证了所提算法的有效性和鲁棒性。
Accurately estimating the system inertia is crucial for supporting the safe operation of future low-inertia power systems. This paper proposes a system inertia estimation method based on electromechanical response features under the framework of random data-driven analysis
which realizes the estimation of regional effective inertia from stochastic response signals. First
by combining the stochastic Koopman theory with random dynamic system
the coupling relationship between electromechanical features and system inertia in the stochastic Koopman space is derived. Then
the subspace dynamic mode decomposition (SDMD) algorithm is used to extract system electromechanical response features in a data-driven way. This algorithm achieves a low-rank approximation of the system state matrix while compressing the data through orthogonal projection and singular value decomposition
effectively reducing the influence of observation noise on the calculation results. Finally
numerical simulations on the IEEE 4-machine 2-area system and the IEEE 10-machine 39-bus system verify the effectiveness and robustness of the proposed method.
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