基于物理模型的同步电机参数可辨识性研究  

Identifiability of synchronous generator parameters based on physical models

作　　者：陈向宜[1] 查晓明[2] 李春艳 马占军[2] 

机构地区：[1]四川电力试验研究院,四川成都610072 [2]武汉大学电气工程学院,湖北武汉430072 [3]四川省电力公司电网规划中心,四川成都610072

出　　处：《电力自动化设备》2010年第9期58-62,共5页Electric Power Automation Equipment

摘　　要：针对实际辨识过程中出现的参数辨识结果不稳定及多解的情况,提出并研究了基于物理模型的同步电机参数的可辨识性。根据模型可辨识性的概念及分析方法,结合三相同步电机的物理模型特点,推导了三相同步电机的观测方程和忽略定子暂态的状态方程,然后基于该状态方程和观测方程,推导了三相同步电机的传递函数矩阵,最后根据可测输入、输出所对应的传递函数,构造了传递函数系数与待辨识参数之间的关系,实现了基于物理模型的三相同步电机参数的可辨识性分析。仿真结果验证了理论分析的正确性,即仅利用暂态和次暂态过程的测量数据就可以辨识三相同步电机的所有电抗参数。Aiming at the unstable or multiple solutions during parameter identification,the identifiability of synchronous generator parameters based on physical models is studied.According to the concept and analytic method of model identifiability and combined with the characteristics of physical model,the observation equations of three-phase synchronous generator and the state equations without stator transients are deduced,based on which,the transfer function matrix is derived.With the transfer functions corresponding to the measurable inputs and outputs,the relationship between the transfer function coefficients and the parameters to be identified is structured to realize the parameter identifiability analysis based on physical models for three-phase synchronous generator.The validity of theoretical analysis is verified by simulations,i.e.all reactance parameters can be identified only with the measurements of transient and sub-transient states.

关 键 词：同步电机 可辨识性 物理参数 Park模型 传递函数矩阵 

分 类 号：TM301[电气工程—电机]