天然气供应链整体优化

Overall optimization of natural gas supply chain

在实际生产中,天然气供应链系统的构建需要考虑诸多影响因素,但大多数研究考虑的运输方式较为单一,且无法有效解决城市需求量的季度性波动、输送方案与结构布局同时优化等问题。综合考虑输送模式、体积、运输设备、供需能力及站场建设方案等约束,以天然气供应链平均日运行费用最小为目标函数,建立了混合整数线性规划模型(Mixed Integer Linear Programming,MILP)。以某天然气供应链系统年需求任务为例,在满足城市天然气需求量的同时使系统的建设及运行总费用达到最小,求解得到了最优的建设方案、购买方案、运输方案、储气方案及处理厂操作方案,并验证了该模型的准确性,可为天然气供应链系统建设提供指导。(图3,表12,参27)

In practical production,many factors should be considered for construction of natural gas supply chain system.However,in most of the researches,the transportation mode considered was single,which could neither effectively solve the problem of seasonal fluctuation of urban gas demand,nor realize the optimization of transportation mode and structural layout.With the restraints of transportation mode,volume,transportation facilities,the capability of supply and demand,and the construction scheme of stations considered comprehensively,a Mixed Integer Linear Programming(MILP)model was established by setting the minimum average daily operation cost of the natural gas supply chain as the objective function.Taking the annual demand task of a natural gas supply chain as an example,the station construction plan,the purchase plan,the natural gas transportation plan,the gas storage plan and the operation plan of the treatment plant were obtained and the accuracy of MILP model was verified by assuming the minimum construction and operation cost of the system under the condition of satisfying the urban demand of natural gas,which can provide guidance to the construction of natural gas supply chain system.(3 Figures,12 Tables,27 References)