Highlights Bus operators use the existing mixed bus fleets to implement the pre-designed bus timetables while making full use of electric buses. The construction of a trip-pair-based set of feasible charging activities transforms the queuing problem of electric buses waiting for charging into a linear optimization model. Reasonable joint optimization of vehicle and charging scheduling effectively increases the service frequency of electric buses.

    Abstract Owing to the high acquisition costs, maintenance expenses, and inadequate charging infrastructure associated with electric buses, achieving a complete replacement of diesel buses with electric counterparts in the short term proves challenging. A substantial number of bus operators currently find themselves in a situation where they must integrate electric buses with their existing diesel fleets. Confronted with the constraints of limited electric bus range and charging infrastructure, the primary concern for bus operators is how to effectively utilize their mixed bus fleets to adhere to pre-established bus timetables while maximizing the deployment of electric buses, known for their zero pollution and cost-effective travel. Consequently, this paper introduces the concept of the joint optimization problem for vehicle and recharging scheduling within mixed bus fleets operating under constrained charging conditions. To tackle this issue, a mixed integer linear model is formulated to optimize the coordination of bus schedules and recharging activities within the context of limited charging infrastructure. By establishing a set of feasible charging activities, the problem of electric buses queuing for charging at constrained charging stations is transformed into a linear optimization model constraint. Numerical simulations are conducted within the real transit network of the Dalian Economic Development Zone in China. The results indicate that the judicious joint optimization of vehicle and charging scheduling significantly enhances the service frequency of electric buses while reducing operational costs for bus lines. Notably, the proportion of total trips performed by electric buses rises to 80.4%.


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    Title :

    Joint optimal vehicle and recharging scheduling for mixed bus fleets under limited chargers


    Contributors:
    Cui, Shaohua (author) / Gao, Kun (author) / Yu, Bin (author) / Ma, Zhenliang (author) / Najafi, Arsalan (author)


    Publication date :

    2023-10-19




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English