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arXiv 2212.04592eess.SYcs.SY
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基于图神经网络的时同步状态估计:在拓扑变化中的应用

Time-Synchronized State Estimation Using Graph Neural Networks in Presence of Topology Changes

Arizona State University(亚利桑那州立大学)

Shiva Moshtagh, Anwarul Islam Sifat, Behrouz Azimian, Anamitra Pal

AI总结:

本文提出基于图神经网络的时同步状态估计方法,在存在非高斯噪声和拓扑变化时优于传统方法。

摘要:

最近,开发数据驱动方法,涉及机器学习(ML)用于电力系统高速静态状态估计(SE)的研究受到了广泛关注。这种关注源于ML在克服基于模型的方法的困难方面的潜力,例如处理非高斯测量噪声。然而,拓扑变化对执行ML状态估计构成了严峻挑战,因为当发生此类变化时,训练和测试环境会变得不同。本文通过构建一个基于图神经网络(GNN)的时同步状态估计器来克服这一挑战,该估计器在训练过程中考虑了电力系统的物理连接。使用IEEE 118节点系统获得的结果表明,在存在非高斯测量噪声和拓扑变化的情况下,基于GNN的状态估计器优于基于模型的线性状态估计器和基于数据驱动的深度神经网络的状态估计器。

英文摘要:

Recently, there has been a major emphasis on developing data-driven approaches involving machine learning (ML) for high-speed static state estimation (SE) in power systems. The emphasis stems from the ability of ML to overcome difficulties associated with model-based approaches, such as handling of non-Gaussian measurement noise. However, topology changes pose a stiff challenge for performing ML-based SE because the training and test environments become different when such changes occur. This paper circumvents this challenge by formulating a graph neural network (GNN)-based time-synchronized state estimator that considers the physical connections of the power system during the training itself. The results obtained using the IEEE 118-bus system indicate that the GNN-based state estimator outperforms both the model-based linear state estimator and a data-driven deep neural network-based state estimator in the presence of non-Gaussian measurement noise and topology changes, respectively.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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