基于参数辨识精度的配电网同步量测装置优化配置  

Optimal Configuration of Synchronous Measurement Device in Distribution Network Based on Parameter Identification Accuracy

作　　者：宋卓然 李剑峰 姜涛 邓鑫阳 刘宇 SONG Zhuoran;LI Jianfeng;JIANG Tao;DENG Xinyang;LIU Yu(State Grid Liaoning Electric Power Supply Co.,Ltd.,Shenyang 110006,Liaoning,China)

机构地区：[1]国网辽宁省电力有限公司,辽宁沈阳110006

出　　处：《电气传动》2022年第14期59-64,共6页Electric Drive

基　　金：国网辽宁省电力有限公司科技项目(20210200X)。

摘　　要：配电网同步量测配置过程中存在参数辨识误差,现提出一种基于参数辨识精度的配电网同步量测装置优化配置方法。基于同步量测装置量测数据,由配电网末节点开始分步估计整个配电网的支路参数,采用最小二乘算法确定配电网运行过程中不同时刻下的线路参数;根据量测噪声的敏感度,确定离散度指标,以辨识精度与配置数量综合最优为目标构建同步量测装置配置算法内的指标函数;依照配电网参数辨识精度与配置数量标准迭代,获取令目标函数最小的同步量测装置优化配置方案。实验结果表明,节点电压均值辨识误差较小,控制在0.10%~0.26%,可显著降低研究对象参数辨识误差。There are parameter identification errors in the process of distribution network synchronous measurement configuration. The optimal configuration method of distribution network synchronous measurement device based on parameter identification accuracy was studied. Based on the measurement data of the synchronous measurement device,the branch parameters of the whole distribution network were estimated step by step from the end node of the distribution network,and the line parameters at different times in the operation process of the distribution network were determined by using the least square algorithm. According to the sensitivity of the measurement noise,the dispersion index was determined,and the internal parameters of the synchronous measurement device configuration algorithm were constructed with the comprehensive optimization of the identification accuracy and configuration quantity as the goal. According to the standard of parameter identification accuracy and configuration quantity of distribution network,the optimal configuration scheme of synchronous measurement device with the minimum objective function was obtained. The experimental results show that the identification mean error of node voltage is small,which is controlled between 0.10% and 0.26%,which can significantly reduce the parameter identification error of the research object.

关 键 词：参数 辨识精度 配电网 同步量测装置 优化配置 

分 类 号：TM72[电气工程—电力系统及自动化]