An Economic and Optimal Dispatch Model for Battery Swapping Stations Containing Photovoltaics Considering Variable-speed Charging Mechanism

Abstract

Power swamping is one of the important ways to replenish the energy of electric vehicles. Based on the relationship between battery degradation and charging speed， the paper takes battery swamping stations containing photovoltaics as the research object to design a variable-speed charging mechanism that takes account of the prediction of PV and traffic， and it establishes an economic revenue model of the swamping station considering the variable-speed charging mechanism. The model can flexibly adjust the charging speed of batteries according to the traffic flow and light intensity and optimize the power output and charging power distribution of various power sources. The validity of the model is verified by examples， and the results show that compared with the traditional constant power charging model， the proposed model can utilize PV resources more efficiently， reduce the power purchase cost of the swamping stations， lower the average charging speed of batteries and reduce the cost of battery loss， maximizing the economic benefits of the system.

Keywords

• swapping station
• photovoltaic power generation
• variable-speed charging
• battery degradation