Coordinated operation of large scale electric vehicles charging with wind-thermal power system

The rapid development of renewable energy poses new challenges to the operation of the grid: wind power can not be fully used due to the lack of peak-load regulation capacity and so on. And the electric vehicle charging as controllable provides the opportunity to improve the grid operation. A two-stage control mechanism based on grid and EV users is proposed to determine the coordinated program between large-scale EV charging and wind-thermal system. At the user side, different charging strategies for different users are established to optimize EV charging. At the grid side, a dynamic environmental dispatch model including economy, emission and wind-power abandoned is proposed to optimize outputs of the thermal units. The orthogonal initialization, improved crowd distance calculation and self-adaptive parameter control are put forward due to the weakness existing in the multi-objective differential evolution. Simulations are done in a system containing 10 thermal units and large-scale wind-power system, the coordinated program is determined, and impacts of EV scale and reserve on the operation are also analyzed.