Abstract
With the application of wide-area measurement system (WAMS), the analysis of dynamic behavior of power system based on swing tracks acts as an important research field and is different from the past methods based on a given mathematical models. In this paper,EMD-based eigensystem realization algorithm is proposed for identifying frequency, damping and vibration in the low frequency oscillationidentify for low frequency oscillation frequency, damping and vibration. Through a example of a four-machine two-region system, it is proved that this method on distinguishing the oscillation frequency, damping ratio and mode shapes is validity. This method can be minimal realization of the system, damping controller for the design conditions.this method can achieve the simplest state space modal of system. It is important for designer to invent advanced damping controller.
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