基于正则化拉格朗日乘子法的配电网网络拓扑辨识  

Topology identification of distribution network based on regularized Lagrangian multiplier

作　　者：周宁 方治 蔺晨晖 吴文传[2] ZHOU Ning;FANG Zhi;LIN Chenhui;WU Wenchuan(State Grid Henan Electric Power Research Institute,Zhengzhou 450000,China;Tsinghua University,Beijing 100084,China)

机构地区：[1]国网河南省电力公司电力科学研究院,河南郑州450000 [2]清华大学,北京100084

出　　处：《供用电》2024年第6期12-20,共9页Distribution & Utilization

基　　金：国家电网有限公司科技项目(5400-202424184A-1-1-ZN)。

摘　　要：网络拓扑辨识是配电网能量管理系统中的核心应用之一,是其他各种高级功能进行分析计算的基础。考虑量测中不良数据的影响,提出了一种基于正则化拉格朗日乘子法的配电网网络拓扑辨识方法。该方法将配电网网络拓扑与实际不符的情况视为多个线路的参数误差问题,并采用拉格朗日乘子法进行辨识。重复运行辨识程序,依次校正超过所设阈值的最大正则化拉格朗日乘子所对应的线路,得到正确的配电网网络拓扑模型。通过对比每次辨识程序中的最大正则化残差和最大正则化拉格朗日乘子,区分配电网中的不良数据与拓扑错误,并对不良数据进行自动校正。借助于高精度微型同步相量测量单元(micro-phasor measurement units,μPMU)的量测信息,辨识方法适用于配电网的轻载模式。最后利用IEEE 33节点系统验证所提出的方法,结果表明所提出的方法能有效辨识网络拓扑错误和不良数据。Topology identification is one of the core applications in energy management system of distribution network,which is the basis for various analysis and operation functions of distribution systems.Aiming at addressing bad data in the distribution network,a method of the topology identification for distribution networks based on the regularized Lagrangian multiplier method is proposed.In this method,the topology error of a distribution network is modeled as line parameter errors,and the Lagrangian multiplier method is used for identifying the error.The identification program is executed iteratively to correct the status of the line corresponding to the largest regularized Lagrangian multiplier over the set threshold in order to obtain the correct distribution network topology model.By comparing the largest normalized residuals and the largest regularized Lagrangian multipliers,bad data and topological errors in a distribution network are distinguished,and the bad data can be automatically corrected.With the help of high-precision micro synchronous phasor measurement units,the identification method is suitable for light-load mode in distribution networks.Finally,the simulation experiment is carried out on the IEEE 33-bus example.The results show that the proposed method can effectively identify network topology errors and bad data.

关 键 词：配电网 拓扑辨识 不良数据 轻载模式 拉格朗日乘子法 微型同步相量测量单元 

分 类 号：TM72[电气工程—电力系统及自动化]