基于AMI潮流匹配的中压配电网两阶段拓扑辨识  

Two-stage Topology Identification of Medium-voltage Distribution Network Based on Power Flow Matching of AMI Measurements

作　　者：刘超 杨扬 梁栋[2] 熊光普 高强伟 LIU Chao;YANG Yang;LIANG Dong;XIONG Guangpu;GAO Qiangwei(Chengdong Power Supply Company,State Grid Tianjin Electric Power Company,Tianjin 300250,China;State Key Laboratory of Reliability and Intelligence of Electrical Equipment,Hebei University of Technology,Tianjin 300401,China)

机构地区：[1]国网天津市电力公司城东供电分公司,天津300250 [2]河北工业大学省部共建电工装备可靠性与智能化国家重点实验室,天津300401

出　　处：《电力系统及其自动化学报》2020年第3期123-128,共6页Proceedings of the CSU-EPSA

基　　金：国家电网公司科技资助项目(KJ19-1-23)。

摘　　要：中压配电网拓扑结构变更频繁,基于遥信生成的网络拓扑具有较大的不确定性。为此,提出了一种基于高级量测体系AMI(advanced measurement infrastructure)潮流匹配的辐射状中压配电网两阶段拓扑辨识方法。首先,建立了中压配电网拓扑辨识的改进混合整数二次规划MIQP(mixed-integer quadratic programming)模型,进行初步拓扑辨识;其次,以MIQP结果作为初始拓扑进行局部邻域搜索,采用图的树生成算法生成一阶、二阶邻居生成树,以AMI注入功率量测为负荷依次进行潮流计算,选择电压估计值与量测值最匹配的生成树作为最终拓扑辨识结果;在局部邻域搜索过程中舍弃排名靠后的拓扑以降低潮流匹配计算量。通过33节点配电网算例验证了所提方法的有效性。Topologies of medium-voltage distribution networks change frequently,and the network topologies generated by telecommunicating information have more uncertainties.To solve this problem,a two-stage topology identification method for radial medium-voltage distribution network is proposed,which is based on the power flow matching of ad vanced measurement infrastructure(AMI)measurements.First,a mixed-integer quadratic programming(MIQP)mod el for the topology identification of medium-voltage distribution network is formulated to obtain an initial topology identi fication.Then,local search is executed with the MIQP result as the initial topology.A spanning tree generation algo rithm is adopted to generate the first-and second-order neighboring spanning trees,on which power flow is calculated using the AMI injection power measurements as loads.The spanning tree with the best matching performance between the estimated and measured voltage magnitudes is selected as the final topology identification result.During the local search process,the topologies with lower matching indices are pruned to reduce the computation costs.The effective ness of the proposed method is verified using a 33-bus distribution network as an example.

关 键 词：拓扑辨识 高级量测体系量测 潮流匹配 中压配电网 

分 类 号：TM7[电气工程—电力系统及自动化]