中国电机工程学报2011，Vol.31Issue(13)：101-106,6.
基于内网实测信息的两端口外网静态等值参数估计方法
Parameter Estimation for Two-port External Network Static Equivalent Model on the Basis of Internal Network Measured Information
摘要
Abstract
In order to solve the problem of external network static equivalent parameter estimation effectively, in the case of lacking the information of external network, this paper presents an extended voltage-source-branch ward-equivalent-circuit model (EWM) of external network and it's equivalent parameters' two-stage estimation method. In the first stage, regarded the equivalent injections at the boundary busses and equivalent admittance between the boundary busses as the equivalent parameters, the simplified ward equivalent circuit of two-port external network was constructed and N-time least squares estimation model of equivalent parameters was built. In the second stage, the EWM was formed by changing the equivalent injections at the boundary busses into their equivalent branches. Then least squares estimation model of EWM's parameters was established, considering the relations of the two equivalent circuit parameters. Finally, Gauss-Newton method was applied to get the equivalent parameters of the first and second stage equivalent parameters, and make the latter as the equivalent parameters of the external network. Owing to the restriction effect of the first stage equivalent parameters, the coupling effect among the EWM parameters decreases and the accuracy of equivalent parameter estimations is guaranteed. The test on IEEE 39 bus systemverified the correctness of this paper's method.关键词
外网静态等值/参数估计/最小二乘估计模型/高斯牛顿法/两端口网络/黑箱估计分类
信息技术与安全科学引用本文复制引用
颜伟,李世明,陈俊,卢建刚,郭琳,李钦,赵霞..基于内网实测信息的两端口外网静态等值参数估计方法[J].中国电机工程学报,2011,31(13):101-106,6.基金项目
输配电装备及系统安全与新技术国家重点实验室自主研究项(2007DA10512710204). （2007DA10512710204）
