Optimal Design of Power Supply Scheme for Sharing Resources in Urban Rail Interchange Stations
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摘要:
在不同线路之间通过换乘站实现供电资源共享的背景下，为降低线网供电系统有功网损，以优化供电系统设计为目标，考虑多工况运行的约束条件，提出采用三重校验算法的城市轨道跨换乘站资源共享供电方案优化设计方法. 建立集中式城轨供电系统拓扑模型和跨换乘站资源共享数学模型，基于多叉树拓扑搜索得到候选方案集合，对候选方案进行三重校验优化，获得有功损耗最低的线网供电方案，并以5条线路的实际供电系统为分析实例. 研究结果表明：相比于传统的主变电所资源共享供电方案，本文提出的跨换乘站资源共享供电方案可减少整体供电系统的初期建设成本，降低
2296.580 MW•h的供电系统年运行网损.Abstract:In the context of power supply resource sharing between different lines through interchange stations, optimizing the power supply system design can help reduce active power losses in the network. By considering the constraints of multi-operation scenarios, a novel optimal design method for a power supply scheme for sharing resources in urban rail interchange stations based on a triple-checking algorithm was proposed. A topological model for centralized power supply systems for urban rail and a mathematical model for resource sharing in interchange stations were established. A multi-branch tree topology search was employed to generate a candidate solution set, which was then optimized using the triple-checking algorithm to identify the optimal power supply scheme with the lowest active power loss in the network. An analysis was performed using the actual power supply system of five lines as an example. The results show that compared to the traditional main substation-based power supply scheme for sharing resources, the proposed power supply scheme for sharing resources in urban rail interchange stations reduces the initial construction costs of the overall power supply system and reduces annual operational network losses by 2 296.580 MW•h.
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图 1 某地铁部分路网集中式供电系统
Figure 1. Centralized power supply system forpartial subway network
图 4 各供电方案下线网有功网损
Figure 4. Active power losses of network under each power supply scheme
表 1 算例参数
Table 1. Example parameters
参数名称 数据 主变电所进出线电缆电阻/（Ω•km−1） 0.0971 主变电所进出线电缆电抗/（Ω•km−1） 0.1764 主变电所进出线电缆电纳/（S·km−1） 55.3864 × 10−635 kV 环网电缆电阻/（Ω•km−1） 0.1587 35 kV 环网电缆电抗/（Ω•km−1） 0.1871 35 kV 环网电缆电纳/（S•km−1） 49.078 × 10−6 主变压器过载系数 1.3 
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表 2 主变压器容量
Table 2. Main transformer capacity
MV·A 主变电所 M0 M Ⅰ段安装容量 Ⅱ段安装容量 Ⅰ段平均功率 Ⅱ段平均功率 Ⅰ段安装容量 Ⅱ段安装容量 1 31.5 31.5 17.8 17.8 20.0 20.0 2 40.0 40.0 51.6 51.6 63.0 63.0 3 31.5 31.5 43.4 43.4 50.0 50.0 4 63.0 63.0 20.3 20.3 31.5 31.5 5 40.0 40.0 60.7 60.7 63.0 63.0 6 40.0 40.0 38.4 38.4 40.0 40.0
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表 3 N−1第2种工况负载率
Table 3. Load rate of second working condition of N−1
解列主
变电所支援供电
主变电所主变压器负载率/% Ⅰ段 Ⅱ段 1 6 97.47 87.21 2 5 98.18 104.11 3 4 113.11 116.53 4 3 71.15 73.28 5 2 104.96 122.73 6 5 85.47 99.71 7 5 92.85 106.13
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