Charging And Discharging Dispatch And Coordinated Planning Of Charging And Discharging Facilities For Electric Vehicles

The battery-swapping mode based on the battery lease is a viable business mode to deal with the large-scale development of electric vehicles. There is lack of corresponding theoretical guidance for the coordinated planning of battery-swapping network facilities. Meanwhile, in order to reduce the adverse effects on the grid after the large scale development of electric vehicles, it is need to fully tap the potential demand response. The charge and discharge dispatch is proposed to improve the operation efficiency of the power system.In order to promote the coordinated development of electric vehicles and power grid, based on the energy storage characteristic of the electric vehicles in this paper, the economic dispatch of electric vehicles based on the demand response and the charging and discharging dispatch of electric vehicles based on demand side discharge bidding are proposed. And then, the coordinated planning model of battery-swapping network based on the optimization operation mode is researched.Firstly, the necessity of the research on charging and discharging dispatch and coordinated planning of charging and discharging facilities for electric vehicles is overviewed, and the present development and application of charging and discharging dispatch and planning of charging and discharging facilities for electric vehicles is introduced. Besides, the current academic research is summarized from the aspects of charging and discharging dispatch and coordinated planning of charging and discharging facilities, laid the foundation for the follow-up research.Secondly, this paper proposes a charging control strategy of electric vehicles based on the demand response. The threshold of charging price is set according to the real-time price information in order to reduce charging costs. At the same time, this paper studies the power system unit commitment problem containing large-scale electric vehicle. On this basis, economic scheduling model of the electric vehicles is established based on the demand response according to the prediction of the electric vehicle users'behavior characteristics. This model takes the maximum profit of power grid corporation as the goal and optimize the charging price of electric vehicles to transfer charging load. Simulation result shows that the proposed economic dispatch model can reduce the peak-valley ratio, and can significantly reduce the operation cost of the system compared with the disorderly charging scenario.Then, this paper proposed a charging and discharging dispatch model of electric vehicles based on demand side discharge bidding. In the day-ahead scheduling, the power grid corporation publishes the periods of time which are needed to curtail the load. According to the prediction of the electric vehicle users'behavior characteristics, the load aggregator takes the maximum discharging capacity as the goal to predict the controllable capacity, and then participate in demand side discharge bidding. The power grid corporation is devoted to minimizing the cost of load dispatching through optimizing the dispatch scheme based on the outputs and biddings of load aggregators. In the real-time scheduling, the load aggregator is aimed at maximizing its benefits through optimizing the charging and discharging dispatch of electric vehicles. It not only can meet the charging demand of electric vehicles, but also can reduce the charging cost and the deviation of dispatching. Simulation result shows that the proposed dispatch model can play a role in peak load shifting. The analysis of the prediction accuracy can provide guidance for the biding decision of load aggregator.Finally, independent planning model of each unit in the battery-swapping network was established. The relationship between the number of batteries, logistics capabilities and distribution scheme were researched. The operation mode of battery-swapping network was discussed. And then, the coordinated planning model of battery-swapping network based on the optimization operation mode was established. The operation mode was optimized by the target of minimizing the shortage of the batteries. And use the redundancy of battery-swapping as the judging criterion. After that, the coordinated planning of battery-swapping network was optimized by the target of minimizing the adjustment costs of each unit. The effectiveness of this model was tested by an example. The analysis of the weighting coefficient can provide guidance for the game between each unit in the battery-swapping network.