Application Study Of Self-organized Criticality Theory On Power System Cascading Failure

Large-scale blackouts of electrical power systems have been occurring from time to time around the world. With the development of deregulation in power market, such a failure will often lead to considerable social, political and economical loss Due to the complexity of the black-outs, many questions still remain unanswered. As there are no available solutions to prevent blackouts, which are usual1y caused by a complex sequence of cascading events, an alternative strategy is to minimize the impact of further disturbances. Analysis of recent disturbances reveals some common threads among them, leading to a conclusion that some disturbances can he prevented. Along with the progress on the power system, the development of the electric power network, the power grid often work near their limit; therefore the research on Cascading failures of power system is extremely necessary. The paper discusses some important issues about the self-organized criticality of the large-scale blackouts in power system in detail, including the characteristics of power laws distribution, the fractal and 1/f noise. I then proceed with the introductions and comments on the existing models on cascading failure from the aspect of artificial power system, complex network and generalized network. The results of applying the proposed method to IEEE 39-bus test system further show the rationality of this method .