Optimal charging and discharging dispatching strategy for electric vehicle based on customer's benefit

Aiming at minimizing the customer's charging costs, a charging and discharging dispatching strategy for electric vehicle (EV) is proposed based on the customer's benefit, while the charging and discharging price, battery characteristics and charging requirements are taken into account. Customer decides whether to respond to the charging and discharging plans or not freely, which are determined by dynamic programming algorithm, hence the proposed dispatching strategy for EVs can be realized. Taking the 38-bus system as an example, firstly, the charging performance of customer is obtained by Monte Carlo simulation. Then the owner's costs and the impacts on the distribution system under uncoordinated and coordinated control modes are compared. At the end of this paper, based on the different probabilities of customers' response to the dispatching strategy, the owner's costs and the load fluctuation rate of the distribution system have been simulated and discussed. Simulation results indicate that, through the previously mentioned dispatching strategy, reducing the customer's costs can be achieved as well as peak load shaving and valley load filling on the basis of customer's satisfaction in charging demand. Another conclusion is, the more often the customers respond to the proposed strategy, the better it is for the win-win relationship keeping between the customers and the distribution system.