三阶段式交直流混合主动配电网三相区间状态估计  

Three-phase Interval State Estimation for Three-stage AC-DC Hybrid Active Distribution Network

作　　者：巨云涛[1] 于燕玲 吴文传[2] 王冠楠 JU Yuntao;YU Yanling;WU Wenchuan;WANG Guannan(College of Information and Electrical Engineering,China Agricultural University,Beijing 100083,China;Department of Electrical Engineering,Tsinghua University,Beijing 100084,China;State Grid Jibei Electric Power Company Limited,Beijing 100055,China)

机构地区：[1]中国农业大学信息与电气工程学院,北京100083 [2]清华大学电机工程与应用电子技术系,北京100084 [3]国网冀北电力有限公司,北京100055

出　　处：《高电压技术》2021年第7期2330-2341,共12页High Voltage Engineering

基　　金：国家电网有限公司科技项目(5108-201914030A-0-0-00)。

摘　　要：为了解决主动配电网由于采用大量伪量测而使得各节点量测质量差别大且伪量测很难给出概率密度分布,只能给定误差量测区间的问题,提出一种三阶段式区间状态估计方法来过滤主动配电网中的量测生数据。首先,通过第一阶段的混合整数线性规划坏数据辨识模型,对模型中极其粗糙的坏数据进行第一阶段的剔除;然后,建立第二阶段更精确的坏数据辨识模型,由于该问题属于混合整数非线性规划问题,其对初值敏感,且求解困难,因此将第一阶段模型的计算结果作为初值,以提高第二阶段的计算效率;最后,进行基于非线性规划模型的区间状态估计。通过3节点和13节点主动配电网系统进行仿真分析,结果表明,所提的三阶段区间状态估计方法既能提高状态估计计算效率,又能保证计算结果的精度。In order to solve the problems that a large number of pseudo measurements which make the measurement quality of each node greatly different are used in active distribution network and it is difficult for pseudo measurements to give the probability density distribution,and that only the error measurement interval can be given,we propose a three-stage interval state estimation method to filter the measurement data in active distribution network.Firstly,through a model of the first stage of mixed integer linear programming bad-data identification,the extremely rough bad-data in the model is eliminated in the first stage.Then,a model of the second stage of more accurate bad-data identification is established.Because this problem belongs to mixed integer nonlinear programming problem,and it is sensitive to the initial value and difficult to solve,the calculation results of the first stage model are compared.Finally,interval state estimation based on nonlinear programming model is carried out.Through the simulation analysis of 3-bus and 13-bus active distribution system,the results show that the proposed three-stage interval state estimation method can be employed to not only improve the calculation efficiency of state estimation,but also ensure the accuracy of calculation results.

关 键 词：主动配电网 交直流混合 区间状态估计 三相不平衡 坏数据辨识 

分 类 号：TM721.3[电气工程—电力系统及自动化]