基于主导和非主导参数的参数可估计性辨识

通过对参数估计应用难点的分析，介绍了参数的可估计性问题。借助电网线性模型的近似分析，提出了参数估计中的主导参数和非主导参数概念。据此解释了参数估计实践中遇到的一些现象，并得出了关于参数估计软件运行方式等的相关结论。根据非主导参数易受量测噪声影响的特点，提出了通过噪声敏感试验的方法辨识主导及非主导参数的方法。对IEEE算例进行了仿真实验，验证了文中提出的参数估计时应去除非主导参数的观点。

Identification of Parameter Estimation Feasibility Based on Dominant Parameter and Non-dominant Parameter

By analyzing the application difficulties of parameter estimation, the parameter estimation feasibility of power system is discussed. The concept of dominant parameter and non-dominant parameter is proposed with the help of approximate analysis by using the linear model of power system. Therefore the behavior of parameter estimation practice can be explained and the inference for the software running mode of parameter estimation can be drawn from the linear model Of power system. Employing the fact that the non-dominant parameter is susceptible to measurement noise, a method of identifying the non-dominant parameter based on the noise sensitivity experiments is presented. Simulation results of an IEEE sample power system are given to verify the viewpoint proposed that the non-dominant parameter should be wiped out in the parameter estimation.