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Parameter identification of low frequency oscillations by Pade method

机译:用Pade方法识别低频振荡的参数

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This paper proposes a novel methodology for characterization of nonlinear low frequency oscillations. Selecting a window of the speed machine signals, a polynomial in the z-domain of the samples is obtained, and then Pade approximation is used to obtain a rational equivalent of the polynomial. This equivalent has a direct relationship with a discrete transfer function which captures the dominant parameters embedded in the speed machine signals. The method is tested with corrupted noisy signals showing that it may be applied to real signals. The developed methodology is applicable to determine the oscillation parameters of speed signals of the 16-Machine 68-bus NPCC power system.
机译:本文提出了表征非线性低频振荡的新方法。选择速度机器信号的窗口,获得样本的z域中的多项式,然后使用Pade逼近获得多项式的有理等价物。该等效项与离散传递函数有直接关系,该离散传递函数捕获嵌入在速度机器信号中的主要参数。用损坏的噪声信号测试了该方法,表明该方法可以应用于真实信号。所开发的方法适用于确定16机68总线NPCC电力系统的速度信号的振荡参数。

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