基于量测残差的改进参数估计方法  

Improved Method of Parameter Estimation Based on Measurement Residuals

作　　者：何桦[1] 柴京慧[1] 卫志农[2] 顾全[1] 

机构地区：[1]南京南瑞继保电气有限公司,江苏省南京市211100 [2]河海大学电气工程学院,江苏省南京市210098

出　　处：《电力系统自动化》2007年第4期33-36,96,共5页Automation of Electric Power Systems

摘　　要：电网参数错误将影响状态估计的质量,并降低能量管理系统中其他高级应用软件的实用化程度。文中简要介绍了主要的参数估计算法,并详细分析了基于量测残差和参数误差间灵敏度关系的参数估计方法。在总体沿袭两步法参数估计方法的基础上,对该方法的近似模型进行了详细分析。为使算法具有更广的适用面,对第1步中偏差向量的计算和第2步中参数的估计方法分别进行了改进。对该算法进行了测试,结果表明,该方法具有良好的应用前景。Errors of network parameters can severely affect the performance of state estimation and degrade the usefulness of other advanced applications in an energy management system （EMS）. The work on processing error of parameter estimation is briefly reviewed in the paper firstly. The method for parameters estimation based on the sensitivity relationship between the measurement residuals and parameter errors are discussed in detail. Following the framework of the two-step parameter estimation method, the approximate models of the bias vector are analyzed in detail. To use it in complex cases, this paper improves the calculation of bias models of the first step and extends the parameters estimation method in the second step to include the estimation of any impedance parameter. Test results of the improved method are presented and show that the method can have good application prospect.

关 键 词：状态估计 参数估计 电力系统 最小二乘估计 量测残差 

分 类 号：TM732[电气工程—电力系统及自动化] TM744