| 引用本文: | 陈向宜,查晓明,李春艳,马占军.[J].电力自动化设备,2010,(9): |
| CHEN Xiangyi,ZHA Xiaoming,LI Chunyan,MA Zhanjun.[J].Electric Power Automation Equipment,2010,(9): |
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| 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。 |
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CHEN Xiangyi1, ZHA Xiaoming2, LI Chunyan3, MA Zhanjun2
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1.Sichuan Electric Power Test & Research Institute，Chengdu 610072，China;2.School of Electrical Engineering，Wuhan University，Wuhan 430072，China;3.Center of Grid Planning，Sichuan Electric Power Company，Chengdu 610072，China
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| Abstract: |
| 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. |
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