Analysis on Power System Self-Organized Criticality and Its Simulation Model

Self-organized criticality is one of the most important theories used to explain the power law relationship between blackout size and blackout probability in power systems. The study on power system self-organized criticality is still in its primary stage and the conception of power system self-organized criticality is not remarkably clear, thus further study on this problem is necessary. Meanwhile, there is not a generally accepted simulation model that can be used as the standard model for the research of power system self-organized criticality. In view of this situation, in this paper the authors compare the sand pile model with power system at first to give a novel analysis and explanation of this problem; then a model to simulate power system self-organized criticality is proposed; finally the simulation of a certain actual power network in China is conducted by the proposed model and the power law that characterizes power system self-organized criticality is obtained, at the same time the parameters to determine power system self-organized criticality are analyzed.