摘要
针对低压配电网阻抗拓扑模型不明确的问题,提出一种基于高级量测体系的低压配电网阻抗拓扑模型构建的在线识别方法。利用AMI提供的各用电用户电压数据,根据各负荷节点的电压相关性及辐射性网络节点电压分布特点,通过K-means聚类算法和用户间的皮尔逊电压相关系数分析原则,完成对低压配电网络拓扑模型的修正。根据修正后的台区拓扑结构中同一相别下智能电表所采集的序列数据,通过计算同一相别所有用户的相电压搭建优化问题模型,使得使用时间序列内不同电表数据计算得到的相电压矩阵方差最小,从而求得配电网线路阻抗参数,实现对配电网络的建模。通过实际算例验证了该方法的可行性和有效性。
As the impedance topology of low-voltage distribution network is not clear,an online identification method of constructing impedance topology model of low-voltage distribution network based on AMI measurement information is proposed in this paper.First,using the voltage data of each power user provided by AMI,and according to the voltage correlation of each load node and the voltage distribution characteristics of the radiant network node,and through the Kmeans clustering algorithm and the Pearson voltage correlation coefficient analysis principle,we revise the low-voltage distribution network topology model.Second,based on the sequence data collected by the smart meter under the same phase in the revised topology of the station area,the optimization problem model is built by calculating the phase voltages of all users in the same phase.The variance of the phase voltage matrix calculated from different meter data in the time series is minimized to obtain the line impedance parameters of the distribution network,thereby the accurate modeling of the distribution network can be realized.Finally,a practical example is used to verify the feasibility and effectiveness of the method.
作者
李彦兆
赵庆生
梁定康
王旭平
LI Yanzhao;ZHAO Qingsheng;LIANG Dingkang;WANG Xuping(Shanxi Key Laboratory of Power System Operation and Control,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China)
出处
《电网与清洁能源》
北大核心
2021年第4期15-22,31,共9页
Power System and Clean Energy
基金
国家自然科学青年基金项目(51907138)
山西省应用基础研究项目(201801D221362)。
关键词
高级量测体系
低压配电网
拓扑辨识
线路参数估计
advanced metering infrastructure
low-voltage distribution network
topology identification
identification of line parameters
