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.