Simultaneous optimization of assignment, reallocation and charging of electric vehicles in sharing services

Electric vehicles (EVs) are being used in car sharing services to reduce CO2 emission and complement transportation in regional societies. To achieve this purpose more effectively, the power used for driving EVs should be provided by renewable energy such a photovoltaic unit, and charging of in-vehicle batteries also should be scheduled optimally considering customers' requests and renewable generation. This means that all EVs and those State-of-Charge (SoC) must be managed individually. In one-way trip services, however, conventional researches have focused on the management of distribution of EVs without individual SoC management. This paper presents a simultaneous optimization of vehicle assignment, reallocation and charging for one-way EV sharing services considering individual states of all EVs and PV generation. Through computational experiments, usefulness of the proposed method is verified from viewpoint of computational cost.