Hierarchical Adjustment Strategy for Orderly Charging of Electric Vehicles Based on Self - Organized Criticality of Distribution Network

Aiming at the safe operation of distribution network in the orderly charging strategy of electric vehicles(EVs), a hierarchical adjustment strategy of orderly charging is proposed based on the self-organized critical characteristics of distribution network. Firstly, simulating the evolution process of distribution network during large-scale EV charging in the form of synchronous evolution of sandpile group, and proposing a co-evolution model of charging load and distribution network based on multi-sandpile idea. Then, by analyzing the self-organized criticality characteristics of the distribution network and the charging behavior characteristics of the users, considering the line load rate, the charging station optimization probability, the branch outage distribution factor and the relative entropy, an orderly charging hierarchical adjustment strategy for EVs is proposed. Finally, the IEEE118 node system is selected as an example for simulation and analysis. The test shows that the above strategy is feasible and effective.