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电网智能化调度与控制教育部重点实验室(山东大学),山东省济南市 250061
Received:13 November 2024,
Revised:2025-02-06,
Published Online:24 June 2025,
Published:10 September 2025
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齐航,李常刚,刘玉田等.基于电气坐标的电力系统动态安全分区评估及模型更新[J].电力系统自动化,2025,49(17):101-111.
QI Hang,LI Changgang,LIU Yutian,et al.Dynamic Security Partitioning Assessment and Model Updating of Power System Based on Electrical Coordinates[J].Automation of Electric Power Systems,2025,49(17):101-111.
齐航,李常刚,刘玉田等.基于电气坐标的电力系统动态安全分区评估及模型更新[J].电力系统自动化,2025,49(17):101-111. DOI: 10.7500/AEPS20241113003.
QI Hang,LI Changgang,LIU Yutian,et al.Dynamic Security Partitioning Assessment and Model Updating of Power System Based on Electrical Coordinates[J].Automation of Electric Power Systems,2025,49(17):101-111. DOI: 10.7500/AEPS20241113003.
考虑运行方式和故障位置的电力系统动态安全评估(DSA)需要海量训练样本,且评估模型结构复杂,存在训练成本高昂和在线更新困难等问题。为解决上述问题,提出一种电力系统动态安全分区评估及模型增量更新方法,降低评估模型复杂度,实现无灾难性遗忘的模型在线增量更新。首先,构建电气坐标作为节点位置特征,引入切比雪夫距离度量节点位置特征间差异,并基于空间约束均值偏移(SCMS)聚类算法进行电网自适应分区。然后,提取运行方式和故障位置特征,将切比雪夫距离嵌入双隐层径向基神经网络(RBFNN),针对不同区域故障位置分别构建分区评估模型。最后,提出模型在线增量更新方法,避免模型更新过程中的灾难性遗忘问题。以中国某省级电网暂态功角稳定评估为应用场景,验证了所提方法的有效性。
The dynamic security assessment (DSA) of power systems considering the operation mode and fault location requires a large number of training samples
and the structure of assessment model is complex
which has the problems of high training costs and difficulty in online updates. To solve these problems
a method for dynamic security partitioning assessment and model increment updating of power system is proposed
which reduces the complexity of the assessment model and enables online model increment updating without catastrophic forgetting. Firstly
electrical coordinates are constructed as node position features
and the Chebyshev distance is introduced to measure the difference between node position features
and the adaptive partitioning of the power grid is carried out based on the space constrained mean shift (SCMS) clustering algorithm. Secondly
the operation modes and fault location features are extracted
and the Chebyshev distance is embedded in the double-hidden-layer radial basis function neural network (RBFNN). Partitioning assessment models for various fault locations in various regions are constructed. Finally
an online model increment updating method is proposed to avoid the problem of catastrophic forgetting during the model updating process. The effectiveness of the proposed method is verified using a transient power angle stability assessment of a provincial power grid in China as an application scenario.
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