An Optimization Method for Configuration of Line Terminal Units Based on Topology-Based Data Collection in Low-Voltage Distribution Areas

doi:10.11930/j.issn.1004-9649.202409048

Abstract

Abstract:

In order to solve the problem of excessive and inefficient allocation of acquisition terminals in the existing low-voltage distribution areas, which leads to high cost of intelligent transformation of the station areas, an optimization method for configuration of line terminal units (LTU) based on the topology of low-voltage distribution station areas is proposed. Firstly, in order to effectively distinguish the branch points, box transformers, branch boxes and the incoming and outcoming switches, based on the concept of zero injection node of distribution network, the supplementary rules of zero injection node in low-voltage distribution station areas are proposed. Secondly, combined with the topological observability criterion, taking the isolated point as the search starting point, the observable tree search method in the low-voltage distribution station area is proposed. Thirdly, to address the problem of unreasonable configuration of acquisition terminals in low-voltage distribution station areas caused by the addition of zero injection nodes, an optimization method for configuration of LTUs based on topology of low-voltage distribution station areas is proposed. Finally, a low-voltage distribution area in Shandong province is used to verify the effectiveness of the proposed method.

Key words: low-voltage distribution areas, zero injection node, topology-based data collection, the observable tree search method, optimal placement

Guang XU, Jun KUANG, Hongyan SONG, Zehu ZHANG, Xiangyu ZANG, Nianshang ZHANG, Yumin ZHANG. An Optimization Method for Configuration of Line Terminal Units Based on Topology-Based Data Collection in Low-Voltage Distribution Areas[J]. Electric Power, 2025, 58(3): 151-161.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202409048

https://www.electricpower.com.cn/EN/Y2025/V58/I3/151

Figures/Tables 12

Fig.1 Configuration rules for data collection terminals in low-voltage distribution areas

Fig.2 Supplementary rules for zero injection nodes in low-voltage distribution areas

Fig.3 Node voltage amplitude measurement equivalent

Fig.4 Network topology of low-voltage distribution areas

Fig.5 Flow of the LTU optimization configuration

Fig.6 A low-voltage distribution area in Shandong province

Table 1 Comparison of scenario 1 LTU configuration results

方案	配置位置	LTU配置数量	配置成本/元
1	出线开关401-429、进线开关4001-4007、零注入节点2、零注入节点3、零注入节点10、零注入节点16、零注入节点17、零注入节点23、零注入节点26	43	20640
2	401-403、405、411、412	6	2880

Fig.7 Scheme 1 observability analysis (scenario 1)

Fig.8 Scheme 2 observability analysis (scenario 1)

Table 2 Comparison of scenario 2 LTU configuration results

方案	配置位置	LTU配置数量	配置成本/元
1	出线开关401-429、进线开关4001-4007、零注入节点2、零注入节点3、零注入节点10、零注入节点16、零注入节点17、零注入节点23、零注入节点26	43	20640
2	401-403、405、411、412、零注入节点2、零注入节点3、零注入节点10、零注入节点17、零注入节点23、零注入节点26	12	5760

Fig.9 Scheme 1 observability analysis (scenario 2)

Fig.10 Scheme 2 observability analysis (scenario 2)

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