It is the precondition for investigating power system running and controlling system design to determine the electromagnetic parameters of synchronous electric machine exactly.
准确地辨识同步电机参数，是研究分析电力系统运行和控制系统设计的前提。
The mathematical models of decay current is identified by using the theory of system identification, and the parameters of synchronous machine are derived from the above mentioned models.
用以精确测量衰减电流：运用系统辨识理论辨识衰减电流曲线的数学模型；并通过该模型推导出同步电机参数。
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