Identification of vulnerable lines in distribution networks based on global graph attention network with multi-dimensional feature fusion

FAN Wenli; WANG Yujie; ZHAO Yuchuan; ZHANG Yeqing; ZENG Yida

doi:10.19783/j.cnki.pspc.260259

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Identification of vulnerable lines in distribution networks based on global graph attention network with multi-dimensional feature fusion

更新时间：2026-09-23

- Identification of vulnerable lines in distribution networks based on global graph attention network with multi-dimensional feature fusion
- Power System Protection and Control Vol. 54, Issue 18, (2026)
- 作者机构：
  
  西南交通大学电气工程学院,四川,成都,611756
- 作者简介：
- 基金信息：
- DOI：10.19783/j.cnki.pspc.260259
  CLC：
- Published：2026
- 稿件说明：
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FAN Wenli, WANG Yujie, ZHAO Yuchuan, et al. Identification of vulnerable lines in distribution networks based on global graph attention network with multi-dimensional feature fusion[J]. Power System Protection and Control, 2026, 54(18).
DOI：

FAN Wenli, WANG Yujie, ZHAO Yuchuan, et al. Identification of vulnerable lines in distribution networks based on global graph attention network with multi-dimensional feature fusion[J]. Power System Protection and Control, 2026, 54(18). DOI： 10.19783/j.cnki.pspc.260259.

摘要

为解决电动汽车充电集群自主接入会显著加剧电网结构脆弱性及局部停电风险的问题，提出一种基于全局图注意力网络(global graph attention network

GGAT)的配电网脆弱线路辨识方法。首先，针对图注意力网络(graph attention network

GAT)采用默认边权重而无法区分其边重要性的问题，引入边特征加权修正注意力计算分数，以体现边的重要性差异。其次，考虑到GAT模型只依赖局部邻域信息的问题，增加全局特征汇总模块，充分利用多维特征以增强模型的表达能力。然后，构建线路状态偏斜度指标，并利用GGAT挖掘电网运行状态与脆弱性之间的映射关系，实现脆弱线路的准确辨识。最后，算例仿真表明，所提方法相较于传统方法表现出最优辨识效果，从而验证了所提方法的有效性和准确性。

Abstract

To address the issue that autonomous integration of electric vehicle charging clusters significantly exacerbates grid structural vulnerability and the risk of local power outages

a method for identifying vulnerable lines in distribution networks using a global graph attention network (GGAT) is proposed. First

to address the inability of conventional graph attention network (GAT) to distinguish the importance of edges due to the use of default edge weights

edge feature-weighting is introduced to modify the attention scores

thereby capturing differences in edge importance. Second

considering that GAT models rely solely on local neighborhood information

a graph-level feature aggregation module is incorporated to fully utilize multidimensional features and enhance the model’s expressive power. Then

a line state deviation metric is developed

and GGAT is utilized to uncover the mapping relationship between the power grid operating states and vulnerability

thereby enabling accurate identification of vulnerable lines. Finally

case simulations demonstrate that the proposed model achieves superior identification performance compared to traditional methods

thereby validating its effectiveness and accuracy.

关键词

Keywords

references

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ZHOU Jin, ZHANG Heng, CHENG Haozhong, et al. Resilience-oriented transmission expansion planning under hurricane impact considering vulnerable line identification and hardening[J]. Protection and Control of Modern Power Systems, 2025, 10(3): 98-113.

WU Yun, PAN Xingyu, YANG Jieming. VMD-informer- DCC for photovoltaic power prediction[J]. IEICE Transactions on Communications, 2024, 107(7): 487-494.

QU Haoao, KUANG Haoxuan, WANG Qiuxuan, et al. A physics-informed and attention-based graph learning approach for regional electric vehicle charging demand prediction[J]. IEEE Transactions on Intelligent Transportation Systems, 2024, 25(10): 14284-14297.

JIANG Enyu, ZHANG Wentao, XUE Ang, et al. Vulnerable node identification method for distribution networks based on complex networks and improved TOPSIS theory[J]. IET Generation, Transmission Distribution, 2023, 17(22): 4991-5002.

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