Article(id=1217789891237298326, tenantId=1146029695717560320, journalId=1146123166801305609, issueId=1217789884081820362, articleNumber=null, orderNo=null, doi=10.12404/j.issn.1671-1815.2405170, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1720540800000, receivedDateStr=2024-07-10, revisedDate=1744300800000, revisedDateStr=2025-04-11, acceptedDate=null, acceptedDateStr=null, onlineDate=1768273335513, onlineDateStr=2026-01-13, pubDate=1753632000000, pubDateStr=2025-07-28, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1768273335513, onlineIssueDateStr=2026-01-13, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1768273335513, creator=13701087609, updateTime=1768273335513, updator=13701087609, issue=Issue{id=1217789884081820362, tenantId=1146029695717560320, journalId=1146123166801305609, year='2025', volume='25', issue='21', pageStart='8761', pageEnd='9209', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1768273333807, creator=13701087609, updateTime=1768273602927, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1217791012932604619, tenantId=1146029695717560320, journalId=1146123166801305609, issueId=1217789884081820362, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1217791012932604620, tenantId=1146029695717560320, journalId=1146123166801305609, issueId=1217789884081820362, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=8936, endPage=8944, ext={EN=ArticleExt(id=1217789891832889554, articleId=1217789891237298326, tenantId=1146029695717560320, journalId=1146123166801305609, language=EN, title=Fault Diagnosis in Distribution Networks with Distributed Generation Based on Improved Graph Neural Network, columnId=1156262733675876713, journalTitle=Science Technology and Engineering, columnName=Papers·Electrical Technology, runingTitle=null, highlight=null, articleAbstract=
The weak fault characteristics and the presence of numerous harmonic signals in distribution networks with renewable energy sources reduce the effectiveness of traditional fault diagnosis methods. A fault diagnosis method based on an improved graph neural network was proposed. Wavelet transform was applied to extract the detail coefficients of current and voltage before and after faults. Weighted projection correlation analysis was performed to calculate the correlation between electrical quantities. Highly correlated quantities were selected as inputs to construct the fault diagnosis model using a graph neural network. Fault simulation models for different voltage levels were developed in MATLAB/Simulink. The results indicate that fault signals are effectively enhanced, and faults are accurately located and classified in distribution networks with renewable energy sources at different voltage levels. Good diagnostic performance is maintained in the presence of data loss and noise, demonstrating strong robustness and generalization.
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分布式电源大量接入,导致含源配网故障弱特征化以及故障时刻产生大量谐波信号,传统故障诊断方法应用效果不佳。提出一种基于改进图神经网络的含源配网故障诊断方法。首先,利用小波变换提取故障前后电流电压细节系数;其次,通过加权投影关联分析法计算各电气量之间的关联度;再次,选择关联度较高的电气量作为输入搭建基于图神经网络的含源配网故障诊断模型;最后,在MATLAB/Simulink中搭建了不同电压等级的含源配网故障仿真模型。结果表明,该故障诊断方法能有效强化故障信号并在不同电压等级的含源配网下对故障准确定位与分类,在数据缺失与噪声环境下也能保持良好的诊断性能,具有良好的鲁棒性与泛化性。
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Power system modeling, figureFileSmall=BNRm7cgpDAS26opDl+kYEQ==, figureFileBig=vU5K6it2un32TyU9D6URog==, tableContent=null), ArticleFig(id=1217860118138504011, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=CN, label=图1, caption=
电力系统建模 点1~14为系统电气节点;G为分布式电源
, figureFileSmall=BNRm7cgpDAS26opDl+kYEQ==, figureFileBig=vU5K6it2un32TyU9D6URog==, tableContent=null), ArticleFig(id=1217860118318859096, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=EN, label=Fig.2, caption=
Schematic diagram of fault location structure based on graph neural network, figureFileSmall=ucSdi0tvN9qrh8dKw9r4Fg==, figureFileBig=bWuGd1s4HYVo3rdb9JU5hw==, tableContent=null), ArticleFig(id=1217860118562128737, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=CN, label=图2, caption=
图神经网络故障定位结构示意图, figureFileSmall=ucSdi0tvN9qrh8dKw9r4Fg==, figureFileBig=bWuGd1s4HYVo3rdb9JU5hw==, tableContent=null), ArticleFig(id=1217860118679569265, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=EN, label=Fig.3, caption=
Flowchart of the improved GCN, figureFileSmall=Mw+PnJ1mbbYJ5/2izqECFw==, figureFileBig=I9/mjvgFOXs1fGZCgAx3rg==, tableContent=null), ArticleFig(id=1217860118792815480, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=CN, label=图3, caption=
改进图神经网络流程图, figureFileSmall=Mw+PnJ1mbbYJ5/2izqECFw==, figureFileBig=I9/mjvgFOXs1fGZCgAx3rg==, tableContent=null), ArticleFig(id=1217860118927033216, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=EN, label=Fig.4, caption=
IEEE 33-bus distribution network model with DG, figureFileSmall=7FPRU+dlvoKNdKd1+5G4Ag==, figureFileBig=imn05bimF+wCuZXCxfjvng==, tableContent=null), ArticleFig(id=1217860119111582605, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=CN, label=图4, caption=
IEEE33节点含源配电网模型 DG1、DG2分别表示不同的分布式电源
, figureFileSmall=7FPRU+dlvoKNdKd1+5G4Ag==, figureFileBig=imn05bimF+wCuZXCxfjvng==, tableContent=null), ArticleFig(id=1217860120055301016, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=EN, label=Fig.5, caption=
First-level detail coefficients of voltage, figureFileSmall=ngJlRIUIebKx6N/fMYYHYQ==, figureFileBig=ZOkj3C7mkC6JgmAfnhz60Q==, tableContent=null), ArticleFig(id=1217860120227267489, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=CN, label=图5, caption=
电压MODWT第一级细节系数值, figureFileSmall=ngJlRIUIebKx6N/fMYYHYQ==, figureFileBig=ZOkj3C7mkC6JgmAfnhz60Q==, tableContent=null), ArticleFig(id=1217860120428594093, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=EN, label=Fig.6, caption=
First-level detail coefficients of current, figureFileSmall=6GqtSzjAuQ98r0/8xloX3w==, figureFileBig=BYdnY66yTEkfiVYjxG8i9w==, tableContent=null), ArticleFig(id=1217860120646697916, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=CN, label=图6, caption=
电流MODWT第一级细节系数, figureFileSmall=6GqtSzjAuQ98r0/8xloX3w==, figureFileBig=BYdnY66yTEkfiVYjxG8i9w==, tableContent=null), ArticleFig(id=1217860120827052996, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=EN, label=Fig.7, caption=
Traditional distribution network detail coefficients, figureFileSmall=dmn0SZven0LI42c3FHaqhw==, figureFileBig=z4dDgK4Wl71/qnKNRVo6vw==, tableContent=null), ArticleFig(id=1217860120969659340, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=CN, label=图7, caption=
传统配网细节系数, figureFileSmall=dmn0SZven0LI42c3FHaqhw==, figureFileBig=z4dDgK4Wl71/qnKNRVo6vw==, tableContent=null), ArticleFig(id=1217860121099682773, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=EN, label=Fig.8, caption=
Correlation plot, figureFileSmall=McmchzxOczRWe978zGJAIA==, figureFileBig=16XdaUkqlLDIxnRWFIH4Mw==, tableContent=null), ArticleFig(id=1217860121242289119, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=CN, label=图8, caption=
关联系数图, figureFileSmall=McmchzxOczRWe978zGJAIA==, figureFileBig=16XdaUkqlLDIxnRWFIH4Mw==, tableContent=null), ArticleFig(id=1217860121376506855, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=EN, label=Fig.9, caption=
Loss and accuracy of the improved graph neural network model, figureFileSmall=IaLeE4nQu0INrn1JBhAodA==, figureFileBig=hQK4W0ZVbuVSplgoynRDqg==, tableContent=null), ArticleFig(id=1217860121577833460, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=CN, label=图9, caption=
改进图神经网络模型损失与准确率, figureFileSmall=IaLeE4nQu0INrn1JBhAodA==, figureFileBig=hQK4W0ZVbuVSplgoynRDqg==, tableContent=null), ArticleFig(id=1217860121703662592, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=EN, label=Fig.10, caption=
Performance of the model with different electrical inputs, figureFileSmall=ratwn9b92IYCXJpFKhv8nA==, figureFileBig=9Ss/L3SDdPJVvWvQtdNPQg==, tableContent=null), ArticleFig(id=1217860121888210959, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=CN, label=图10, caption=
不同电气量输入的模型性能, figureFileSmall=ratwn9b92IYCXJpFKhv8nA==, figureFileBig=9Ss/L3SDdPJVvWvQtdNPQg==, tableContent=null), ArticleFig(id=1217860122081148955, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=EN, label=Fig.11, caption=
t-SNE dimensionality reduction visualization of fault classification, figureFileSmall=tjj1Tzh+EiPppTojLCuJtA==, figureFileBig=Whs0BpHnxERQzV6BRJxpWQ==, tableContent=null), ArticleFig(id=1217860122194395171, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=CN, label=图11, caption=
故障分类t-SNE降维可视化效果图, figureFileSmall=tjj1Tzh+EiPppTojLCuJtA==, figureFileBig=Whs0BpHnxERQzV6BRJxpWQ==, tableContent=null), ArticleFig(id=1217860122274086953, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=EN, label=Fig.12, caption=
Classification accuracy of different diagnostic models under various noise levels, figureFileSmall=tMItK+qjYlP2bwR/lEnU9g==, figureFileBig=BfM4fGefzor7JeR13VEh9A==, tableContent=null), ArticleFig(id=1217860122387333173, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=CN, label=图12, caption=
不同噪声下诊断模型分类准确率, figureFileSmall=tMItK+qjYlP2bwR/lEnU9g==, figureFileBig=BfM4fGefzor7JeR13VEh9A==, tableContent=null), ArticleFig(id=1217860122546716735, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=EN, label=Fig.13, caption=
Classification accuracy of diagnostic model under different data loss conditions, figureFileSmall=aK07YpuczViqTF5QC1hCZQ==, figureFileBig=b85X1mRiAMJpaABBLeyAqA==, tableContent=null), ArticleFig(id=1217860122668351559, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=CN, label=图13, caption=
不同数据缺失下诊断模型分类准确率, figureFileSmall=aK07YpuczViqTF5QC1hCZQ==, figureFileBig=b85X1mRiAMJpaABBLeyAqA==, tableContent=null), ArticleFig(id=1217860122781597777, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=EN, label=Table 1, caption=
GCN network structure and parameters
, figureFileSmall=null, figureFileBig=null, tableContent=
| 网络层类型 | 网络层参数 | 卷积核 | 输出层 | |
| 输入层 | 图数据 | — | nfeat×512 | |
| 特征提取器 | GCN-conv1 | 512×512 | nfeat×512 | |
| GCN-conv2 | 512×512 | nfeat×512 | |
| 特征分类器 | FC-layer | 512×nclass | nfeat×nclass | |
| softmax | — | nfeat×nclass | |
), ArticleFig(id=1217860122915815511, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=CN, label=表1, caption=
GCN网络结构及参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 网络层类型 | 网络层参数 | 卷积核 | 输出层 | |
| 输入层 | 图数据 | — | nfeat×512 | |
| 特征提取器 | GCN-conv1 | 512×512 | nfeat×512 | |
| GCN-conv2 | 512×512 | nfeat×512 | |
| 特征分类器 | FC-layer | 512×nclass | nfeat×nclass | |
| softmax | — | nfeat×nclass | |
), ArticleFig(id=1217860123033256034, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=EN, label=Table 2, caption=
Confusion matrix for fault classification
, figureFileSmall=null, figureFileBig=null, tableContent=
| 预测标签 |
| 0 | 1 | 2 | 3 |
| 真实标签 | 0 | 1.00 | 0.00 | 0.00 | 0.00 |
| 1 | 0.00 | 0.99 | 0.00 | 0.01 |
| 2 | 0.00 | 0.00 | 1.00 | 0.00 |
| 3 | 0.01 | 0.00 | 0.01 | 0.98 |
), ArticleFig(id=1217860123188445294, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789891237298326, language=CN, label=表2, caption=
故障分类混淆矩阵
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| 预测标签 |
| 0 | 1 | 2 | 3 |
| 真实标签 | 0 | 1.00 | 0.00 | 0.00 | 0.00 |
| 1 | 0.00 | 0.99 | 0.00 | 0.01 |
| 2 | 0.00 | 0.00 | 1.00 | 0.00 |
| 3 | 0.01 | 0.00 | 0.01 | 0.98 |
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