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Induced state space average model of isolated power system

This paper establishes periodic orbit model for the isolated power system (IPS). Stability margin index can be calculated by the model, which represents not only the level of system stability but also the decaying speed of the dynamic response to the increment of state variables. An induced state space average model for IPS is presented based on the periodic orbit model, which is extension of the traditional state space average model. Studies show that the proposed model and algorithm can be used to analyze small signal stability of IPS and design its control strategy.