一种基于最小二乘法的配网设备参数辨识方法

A Method for Parameter Identification of Distribution Network Equipment Based on Least Square Method

为了提高配电网损耗计算的准确性,提出了一种配网设备参数的辨识方法。利用配电网有限的实时量测数据,对配电网不同类型的节点建立参数辨识方程,并采用最小二乘法在线估计配电网设备参数。基于图论思想对配电网按节点类型进行分层处理,分层求解配电网设备参数,并计算各支路损耗。算例分析表明,所提出的配网设备参数辨识方法实用、有效性强,能提高配电网损耗计算的准确性,有利于配网节能改造工作的开展。

In order to improve the accuracy of distribution network loss calculation, this paper proposed an identification method of distribution network equipment parameters. Based on the limited real-time measurement data of distribution network, parameter identification equations were established for different types of nodes in distribution network, and the parameters of distribution network equipment were estimated online by least square method. Based on graph theory, the distribution network was hierarchically processed according to node type, and the distribution network equipment parameters were solved hierarchically,and the branch losses were calculated. The example analysis shows that the proposed method is practical and very effective, can improve the accuracy of distribution network loss calculation, and is conducive to the energy-saving transformation of distribution network.