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Joint Economic Optimization of AGV Logistics Scheduling and Orderly Charging in a Low-Carbon Automated Terminal
WANG Xuan, WANG Bao, CHEN Yanping, LIU Hong, MA Xiaohui
Journal of Shanghai Jiao Tong University    2024, 58 (9): 1370-1380.   DOI: 10.16183/j.cnki.jsjtu.2023.027
Abstract   (2058 HTML8 PDF(pc) (3702KB)(557)  

To improve the current automated guided vehicle (AGV) charging strategy at automated terminals, which is not fully coordinated with the distributed power supply, a joint optimization method of AGV logistics scheduling and orderly charging is proposed. First, the synergetic relationship between AGV logistics scheduling and charging scheduling is analyzed, and a joint optimization framework is built. Then, a method to calculate the distance traveled by AGVs while considering the segregation requirements of trucks inside and outside the terminal is proposed. Afterwards, for the AGV charging module, the judgment conditions of AGV charging status and the pile selection method are defined. Furthermore, to minimize the cost of purchasing electricity at the terminal, a joint optimization model of logistics scheduling and orderly charging is constructed by considering time-of-use tariff, distributed power feed-in tariff, power balance constraint, state of charge constraint at the termination moment, upper and lower bound constraints of decision variables, and logistics scheduling constraint. Finally, a fast solution method based on improved particle swarm optimization algorithm is proposed, of which the effectiveness and economic efficiency are verified by an actual case of a terminal.


Fig.5 Comparison of proposed method with other strategies
Extracts from the Article
以3座岸桥并行作业为例,AGV起始SOC设置如下:1~19号均为20%;20~38号均为40%;39~57号均为60%;58~76号均为80%;整体均值为50%.调度结束时刻SOC均值不低于70%.为验证联合优化能提高码头经济性,对比无序充电、仅考虑分时电价、仅考虑风光出力和本文优化策略,此处无序充电表示AGV电量低于20%时充电,充到100%后停止.对比各时段AGV充电电量结果如图5所示.
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