| 引用本文: | 李滨,舒晴川,陶思思,梁宇帆.考虑中区重新划分的中压配电网改造规划[J].电力自动化设备,2019,39(12): |
| LI Bin,SHU Qingchuan,TAO Sisi,LIANG Yufan.Reconstruction planning of medium voltage distribution network considering partition re-division[J].Electric Power Automation Equipment,2019,39(12): |
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| 摘要: |
| 针对目前中压配电网环网线路自动转供率不高的问题，提出打破原有配电网中区限制，对中区进行重新划分后再行改造的规划策略，在新划分的中区范围内通过重构与分支层扩展并举的方法优化部分分支负荷的接入点，实现降低主干馈线负载率、满足转供安全校验条件的目的。基于Distflow潮流方程构建考虑中区重新划分的城市配电网扩展与重构改造模型，该模型满足中区划分约束、“N-1”负荷校验约束及网络拓扑约束要求。采用二阶锥松弛技术对该混合整数非凸非线性规划进行凸松弛，使原问题转化为可高效求解的混合整数二阶锥问题。采用Portugal 54节点配电网对所提模型进行仿真测试，结果表明中区的重新划分使配电网改造在有序的基础上更为灵活，改造后的馈线满足联络开关自动转供的要求，提高了网架整体的可靠性。 |
| 关键词: 配电自动化 配电网改造 中区重新划分 混合整数二阶锥规划 |
| DOI：10.16081/j.epae.201912002 |
| 分类号:TM73 |
| 基金项目:国家自然科学基金资助项目(51767004) |
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| Reconstruction planning of medium voltage distribution network considering partition re-division |
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LI Bin1, SHU Qingchuan1,2, TAO Sisi1,2, LIANG Yufan1,2
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1.Key Laboratory of Guangxi Electric Power System Optimization and Energy-saving Technology, Guangxi University, Nanning 530004, China;2.Foshan Power Supply Bureau of Guangdong Power Grid Corporation, Foshan 528000, China
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| Abstract: |
| Aiming at the problem of low automatic transfer rate of medium voltage distribution network, a planning strategy is proposed, which breaks the original partition limitation of distribution network and carries out the transformation after re-dividing the partitions. The access points of partial branch load are optimized by the method of reconstruction and branch level expansion in the newly-divided partitions, so as to realize the objects of reducing the load rate of main feeders and satisfying the transfer security verification condition. Based on Distflow power flow equation, an expansion and reconstruction model for urban distribution network is built considering partition re-division, which satisfies the partition division constraint,“N-1”load verification constraint and network topology constraint. The second-order cone relaxation technique is adopted for convex relaxation of the mixed integer non-convex nonlinear programming, so that the original problem can be transformed into a mixed integer second-order cone problem which can be solved efficiently. Portugal 54-bus distribution network is adopted for simulation and test of the proposed model, and results show that the partition re-division makes the distribution network transformation more flexible on the basis of order, and the feeders satisfy the automatic transfer requirement of tie switch after transformation, which improves the overall reliability of the grid. |
| Key words: distribution automation distribution network transformation partition re-division mixed integer second-order cone programming |
