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1.智能电网教育部重点实验室(天津大学),天津市 300072
2.天津市电力系统仿真控制重点实验室(天津大学),天津市 300072
3.国网智能电网研究院有限公司,北京市 102209
王守相(1973—),男,博士,教授,博士生导师,主要研究方向:分布式发电与智能配电网。E-mail:sxwang@tju.edu.cn
李慧强(1995—),男,硕士研究生,主要研究方向:电能质量扰动分析。E-mail:lihuiqiang@tju.edu.cn
赵倩宇(1990—),女,博士,副教授,主要研究方向:智能配用电。E-mail:zhaoqianyu515@126.com
郭陆阳(1995—),男,通信作者,博士研究生,主要研究方向:智能配用电。E-mail:guoluyang@tju.edu.cn
收稿:2024-04-12,
修回:2024-10-30,
网络出版:2024-12-16,
纸质出版:2025-04-10
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王守相,李慧强,赵倩宇等.基于时序二维变换和多尺度Transformer的电能质量扰动分类方法[J].电力系统自动化,2025,49(7):198-207.
WANG Shouxiang,LI Huiqiang,ZHAO Qianyu,et al.Power Quality Disturbance Classification Method Based on Time-series Two-dimensional Transformation and Multi-scale Transformer[J].Automation of Electric Power Systems,2025,49(7):198-207.
王守相,李慧强,赵倩宇等.基于时序二维变换和多尺度Transformer的电能质量扰动分类方法[J].电力系统自动化,2025,49(7):198-207. DOI: 10.7500/AEPS20240412005.
WANG Shouxiang,LI Huiqiang,ZHAO Qianyu,et al.Power Quality Disturbance Classification Method Based on Time-series Two-dimensional Transformation and Multi-scale Transformer[J].Automation of Electric Power Systems,2025,49(7):198-207. DOI: 10.7500/AEPS20240412005.
随着新能源渗透率的不断提高,电网面临的电能质量扰动(PQD)问题变得更加复杂,基于一维PQD信号的传统分类方法难以同时提取并辨识周期性与趋势性扰动。针对此问题,提出了一种基于时序二维变换和多尺度Transformer的PQD分类方法。首先,利用时序二维变换将一维PQD时间序列转换为一组基于多个周期的二维张量,以实现在二维空间中深入挖掘PQD信号中所包含的特征信息。然后,通过多尺度Transformer编码器模块提取PQD信号的多尺度特征图,利用多尺度Transformer解码器模块对多尺度特征图进行拼接和特征融合,有效合并在不同尺度上提取的特征图。最后,通过全连接层和Softmax分类器完成PQD分类任务。为验证所提方法的有效性,建立了含24种PQD的数据集对模型进行测试,结果表明所提方法对PQD信号具有较高的分类准确率和噪声鲁棒性。
With the increasing penetration of renewable energy
the power quality disturbance (PQD) problem faced by the power grid has become more complicated. The traditional classification method based on one-dimensional PQD signals has difficulty in extracting and identifying periodic and trend disturbances at the same time. To address this problem
this paper proposes a PQD classification method based on time-series two-dimensional transformation and multi-scale Transformer. First
the time-series two-dimensional transformation is used to convert the one-dimensional PQD time series into a set of two-dimensional tensors based on multiple periods
to deeply mine the characteristic information contained in the PQD signals in the two-dimensional space. Then
the multi-scale feature map of the PQD signal is extracted through the multi-scale Transformer encoder module. And the multi-scale Transformer decoder module is used to splice and fuse the multi-scale feature maps
for effectively merging the feature maps extracted on different scales. Finally
the PQD classification task is accomplished through a fully connected layer and a Softmax classifier. To verify the effectiveness of the proposed method
a dataset containing 24 kinds of PQD is established to test the model. The results indicate that the proposed method has a high classification accuracy and noise robustness for PQD signals.
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