成品油管铁联运物流优化

Optimization of refined oil logistics considering pipeline-rail combined transportation

成品油物流优化研究大多关注油库库存优化,决策中通常缺乏对运输方式的合理选择以及批次输送对管输方案的影响。基于此,在满足油库各油品需求的前提下,以总体运输费用最小为目标函数,考虑油库需求、库容、运输能力等约束,构建了成品油物流优化模型;以管道沿线各分输站实际分输油品量与需求量偏差之和最小为目标函数,考虑批次跟踪、批次分输、节点流量等约束,构建了成品油管道调度优化模型。将上述两个模型耦合成考虑管道、铁路联合运输的成品油物流优化模型,迭代求解物流方案与管道调度计划,最终得到满足管道运输能力的成品油物流方案。将所构建模型应用于某区域成品油物流方案的制定,优化结果相对于传统编制方案管输量得到提升,铁路运输里程相应缩短,整体物流成本降低了4.18%,对于成品油销售企业制定合理的物流计划具有参考作用。(图5,表8,参21)

The optimization of oil depot inventory is focused in most of the previous researches on the optimization of refined oil logistics,but the reasonable choice of transportation mode and the influence of batch transportation on pipeline transport plan are not considered during decision-making.On this basis,an optimization model of refined oil logistics was constructed under the premise of satisfying the demand of oil products at the oil depot,establishing the objective function of minimizing overall transportation cost and considering the constraints of oil depot demand,storage capacity and transportation capacity.Meanwhile,a pipeline scheduling optimization model was also constructed by setting up the objective function of minimizing the sum of deviations between the actual delivery volume of oils and the demand of the delivery stations along the pipeline,with consideration to the constraints of batch tracking,batch delivery and node flow.Finally,a refined oil logistics plan satisfying the transportation capacity of pipeline was obtained by coupling the above two models into an optimization model of refined oil logistics,considering the pipeline-rail combined transportation,and iteratively solving the logistics plan and pipeline scheduling plan.Specifically,the constructed model was applied to the formulation of a regional logistics plan for refined oil.The optimization results show that the pipeline transportation volume is improved,the mileage of railway transportation is shortened,and the overall logistics cost is reduced by 4.18%compared with the site plan.The research results have some guiding significance for the refined oil marketing enterprises to develop a reasonable logistics plan.(5 Figures,8 Tables,21 References)