频域法在励磁系统参数辨识中的应用

提出了一种励磁系统辨识参数的方法，即频域的FFT/LSE法。应用信号处理技术，通过快速傅里叶变换（FFT）将时域信号转换至频域，再根据最小二乘（LSE）原理辨识出励磁系统的常用标准模型。给出了一套非标准励磁系统通过参数辨识转换为中国电力科学研究院仿真软件PSASP下标准模型的实例，结果证明了频域FFT/LSE法辨识结果正确，可用来进行发电机组励磁系统参数的辨识。

APPLICATION OF FREQUENCY DOMAIN METHOD IN PARAMETER IDENTIFICATION FOR EXCITATION SYSTEMS OF GENERATORS

A method of the parameter identification for the excitation system of the generator is introduced, that is FFT/LSEmethod in frequency domain. The method of the fast Fourier transformation (FFT) is used to transform the signals in timedomain into frequency domain. and then identifies the parameters for standard excitation system models which areconventionally used according to the least square theory. An example is given, in which a set of the non-standard excitationsystem is transformed into the standard model under the PSASP simulation software by the parameter identification method.The correctness of the result proves that the FFT/LSE method can be used for identifying the excitation system parameters of generators.