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arXiv · 2412.05957

A Two-Stage AI-Powered Motif Mining Method for Efficient Power System Topological Analysis

Yiyan Li·Zhenghao Zhou·Jian Ping·Xiaoyuan Xu·Zheng Yan·Jianzhong Wu
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Abstract

Graph motif, defined as the microstructure that appears repeatedly in a large graph, reveals important topological characteristics of the large graph and has gained increasing attention in power system analysis regarding reliability, vulnerability and resiliency. However, searching motifs within the large-scale power system is extremely computationally challenging and even infeasible, which undermines the value of motif analysis in practice. In this paper, we introduce a two-stage AI-powered motif mining method to enable efficient and wide-range motif analysis in power systems. In the first stage, a representation learning method with specially designed network structure and loss function is proposed to achieve ordered embedding for the power system topology, simplifying the subgraph isomorphic problem into a vector comparison problem. In the second stage, under the guidance of the ordered embedding space, a greedy-search-based motif growing algorithm is introduced to quickly obtain the motifs without traversal searching. A case study based on a power system database including 61 circuit models demonstrates the effectiveness of the proposed method.

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Yiyan Li, Zhenghao Zhou, Jian Ping, Xiaoyuan Xu, Zheng Yan, Jianzhong Wu. 2024-12-08. A Two-Stage AI-Powered Motif Mining Method for Efficient Power System Topological Analysis. https://arxiv.org/abs/2412.05957

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