| 引用本文: | 刘洪,王浩嘉,徐正阳,王冰赛,马良,杨帆.基于联络馈线负载率松弛约束的中压配电网供电单元划分[J].电力自动化设备,2024,44(7):108-115 |
| LIU Hong,WANG Haojia,XU Zhengyang,WANG Bingsai,MA Liang,YANG Fan.Medium-voltage distribution network power supply unit division considering relaxed load rate constraint of tie line[J].Electric Power Automation Equipment,2024,44(7):108-115 |
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| 摘要: |
| 当前中压配电网供电单元划分时未能充分考虑相互联络馈线间所供负荷的互补特性，易造成供电单元数量偏多、整体线路利用效率偏低等问题，为此提出了一种基于负载率松弛约束的供电单元划分方法。构建了以供电单元数量最少、各供电单元内N-1校验后转供馈线负载率均衡为目标的中压配电网供电单元划分数学模型；解析了网格中站内供电单元与站间供电单元之间的划分次序问题，并提出了基于馈线负载率松弛约束的站间供电单元划分方法及以此为基础的站内供电单元划分方法。通过实例分析验证所提模型和方法可以对供电单元进行合理划分，节约变电站出线条数与供电单元数量，有效提高配电线路的资产利用效率。 |
| 关键词: 中压配电网 供电网格 供电单元 负荷特性 负载率松弛 |
| DOI：10.16081/j.epae.202403018 |
| 分类号:TM715 |
| 基金项目:国家电网有限公司总部科技项目(新型城市配电系统单元集群组网结构及规划评价技术)(5100-202356014A-1-1-ZN) |
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| Medium-voltage distribution network power supply unit division considering relaxed load rate constraint of tie line |
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LIU Hong1, WANG Haojia1, XU Zhengyang1, WANG Bingsai1, MA Liang2, YANG Fan3
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1.Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China;2.State Grid Economic and Technological Research Institute Co.,Ltd.,Beijing 102209, China;3.Economic and Technological Research Institute of State Grid Tianjin Electric Power Company, Tianjin 300171, China
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| Abstract: |
| Currently, in the division of medium-voltage distribution network power supply unit, the complementary characteristics of the load connected by tie line are not fully considered, which easily leads to problems such as too many power supply units and low utilization efficiency of overall lines. Therefore, a power supply unit division method based on relaxed load rate relaxation is proposed. The mathematical model of power supply unit division in medium-voltage distribution network is established, which not only ensures the minimum number of power supply units, but also considers the load rate balance of transfer lines after N-1 verification in each power supply unit. The division order between the power supply units in the station is analyzed, and the division method of the power supply units between the stations is proposed based on the relaxed load rate constraint, as well as the division method of the power supply units in the station. Finally, through an example analysis, it is verified that the proposed model and method can reasonably divide the power supply units, save the number of substation outgoing lines and power supply units, and fully improve the usage efficiency of distribution lines. |
| Key words: medium-voltage distribution network power supply grid power supply unit load characteristics relaxed load rate |
