Smart Grid Dispatching Strategy Considering the Difference of Electric Vehicle Demand

Plug-in electric vehicle (PEV) has developed rapidly in recent years. Taking discrepant demand of the grid connected PEV into account, a smart grid dispatching strategy considering the demand difference among various kinds of PEVs was proposed. Firstly, according to the demand difference the PEV was divided into unordered charge PEV, schedulable charge PEV and schedulable charge-discharge PEV. Secondly, it was brought forward that considering the difference between high- and low-power regulation and control the schedulable PEV was divided into high-power schedulable PEV and low-power schedulable PEV. Finally, a multi-objective optimal dispatching model with the lowest operating cost of smart grid and the minimal paying fees for the electric vehicle was constructed. Results of calculating example show that considering the discrepant demand of the PEV the accommodation capability of renewable energy sources could be improved and the operating cost of smart grid as well as the paying fees of the owner for the PEV could be reduced by reasonable dispatching of the PEV.