文章摘要
李滨,舒晴川,梁宇帆,等.实现可靠自动转供的城市配电网改造规划[J].电力系统自动化,2019,43(6):177-183. DOI: 10.7500/AEPS20180319005.
LI Bin,SHU Qingchuan,LIANG Yufan, et al.Transformation Planning of Urban Distribution Network with Reliable Automatic Supply Transfer[J].Automation of Electric Power Systems,2019,43(6):177-183. DOI: 10.7500/AEPS20180319005.
实现可靠自动转供的城市配电网改造规划
Transformation Planning of Urban Distribution Network with Reliable Automatic Supply Transfer
DOI:10.7500/AEPS20180319005
关键词: 配电网改造规划  配电自动化  自动转供  混合整数二阶锥规划
KeyWords: transformation planning of distribution network  distribution automation  automatic supply transfer  mixed integer second-order cone programming
上网日期:2019-01-23
基金项目:国家自然科学基金资助项目(51767004)
作者单位E-mail
李滨 广西电力系统最优化与节能技术重点实验室(广西大学), 广西壮族自治区南宁市 530004  
舒晴川 广西电力系统最优化与节能技术重点实验室(广西大学), 广西壮族自治区南宁市 530004
广东电网有限责任公司佛山供电局, 广东省佛山市528000 
shqch123858@outlook.com 
梁宇帆 广西电力系统最优化与节能技术重点实验室(广西大学), 广西壮族自治区南宁市 530004  
羿应棋 广州市奔流电力科技有限公司, 广东省广州市 510670  
摘要:
      分析了目前中压配电网环网线路转供率不高的成因,提出了在中区内通过支路联络开关优化部分负荷的接入点、降低主干馈线负载率,以最小的改造代价即可满足转供安全校验条件的规划策略。以此构建了基于Distflow潮流的辐射状配电网馈线负荷均衡优化模型,满足馈线对“N-1”负荷校验约束及网络拓扑约束。通过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进行求解。为验证该模型的可行性与有效性,采用68节点和34节点配电系统对该模型进行了仿真测试,表明仅通过重构的手段即可使馈线满足联络开关自动转供的要求,并在一定程度上提高了配电网运行的经济性。
Abstract:
      The causes of the low load transfer rate of the ring network in the medium voltage distribution network are analyzed. It is proposed to optimize the partial load access points by changing the state of branch contact switches and reduce the load factors of the main feeders in the mesh-networking. The planning strategy can satisfy the conditions for safety verification at the minimal transformation cost. A feeder load balancing optimization model for radial distribution network based on Distflow is proposed to meet the feeder constraint of “N-1” load and network topology constraints. The second-order cone relaxation technique is applied to convexly relax the mixed integer nonconvex nonlinear programming so that the former condition can be transformed into a mixed integer second-order cone problem that can be efficiently solved. In order to verify the feasibility and effectiveness of this model, the model is tested by 68-node and 34-node distribution networks. The results show that the feeder can satisfy the requirements of automatic supply transfer only by reconstruction, and to some extent, can improve the economics of the distribution network operation.
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