A new factor affecting self-organized criticality in power system

An original view is proposed that, under specific running state, power system self-organized criticality is related to power grid's uniform degree. The uniform degree of power grid was characterized by network topology entropy, and then a model to simulate power system self-organized criticality is proposed. Simulations in an IEEE39-bus system with the proposed model show that, under the uniform loading and flow distribution, the higher grid's uniform degree, the lower probability of power cascading failure will be. Furthermore, balancing power grid's uniform degree can effectively prevent large-scale disastrous blackouts and reduce the risk of entering power self-organized criticality state.