Identification Method for User-transformer Relationship Based on Multi-feature Symbolic Aggregate Approximation and Hierarchical Clustering

被引：0
作者：
Zhou G. [1 ]
Mao H. [1 ]
Feng Y. [1 ]
Hua J. [2 ]
Zeng Y. [3 ]
机构：
[1] School of Electrical Engineering, Southeast University, Nanjing
[2] State Grid Wuxi Power Supply Company of Jiangsu Electric Power Co., Ltd., Wuxi
[3] Guangdong Power Grid Co., Ltd., Guangzhou
来源：
Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2024年 / 48卷 / 03期
关键词：
hierarchical clustering; low-voltage distribution station area; similarity of voltage curves; topology identification; user-transformer relationship;
D O I：
10.7500/AEPS20230419005
中图分类号：
学科分类号：
摘要：
In view of the possible problem of wrong user-transformer relationships in the topology file of the low-voltage distribution station area, this paper proposes a user-transformer relationship identification method based on multi-feature symbolic aggregate approximation (MF-SAX) and hierarchical clustering. First, the symbolic aggregate approximation expression method is used to convert the user voltage time series into string series, and two additional parameters, i. e., the voltage fluctuation coefficient and the voltage change trend, are introduced to strengthen its feature expression. Then, the similarity matrix of the user voltage curves is generated based on the edit distance, and the hierarchical clustering algorithm is combined to realize the identification of the user-transformer relationships. Finally, the results of the practical case show that, compared with some existing methods, the proposed method achieves higher accuracy and few false alarms, which can directly respond to missing data situations, and has higher efficiency. © 2024 Automation of Electric Power Systems Press. All rights reserved.
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页码：133 / 141
页数：8
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