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西安交通大学机械制造系统工程国家重点实验室,西安,710049
Online First:10 June 2014,
Published:2014
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Integration Model of Inventory and Transportation Decisions for Multiple Coal Shipping[J]. 2014, 48(6): 37-42.
Integration Model of Inventory and Transportation Decisions for Multiple Coal Shipping[J]. 2014, 48(6): 37-42. DOI: 10.7652/xjtuxb201406007.
针对大型发电集团煤炭采购海运总成本较高、库存积压严重的问题
提出海运运输库存管理一体化的三层混合整数规划模型。该模型基于多配送中心至多电厂码头的物流配送网络
考虑实际海运中复杂的船舶构成及电厂码头靠泊限制
采用混合整数规划方法
以调度周期内发电集团总部煤炭采购运输成本总和最小作为第一优化目标
以船运公司航次运行总费用最小为第二优化目标
并考虑电厂码头库存成本及库存不平衡惩罚
采用分层序列优化方法对该模型进行求解。基于国内某大型发电集团及其下属12个电厂的实验结果表明:该模型在避免煤炭短缺及库存爆仓的同时
降低供应链系统总费用800万元
减少由等待泊位引起的滞期费用195万元
降低电厂码头平均库存量30%; 分层模型可有效降低由统一建模带来的管理难度及求解复杂度
特别适用于多电厂码头的复杂煤炭海运问题。
A three-level mixed integer programming model is proposed to reduce the cost of coal purchase and transportation in large-scale power generation groups
and to decrease the inventory levels of coal in group's subsidiaries. Mixed integer liner programming is used to establish the model
and the logistic distribution networks among multi-loading ports and multi-unloading ports
vessel capacities and physical constrains of subsidiaries are considered in the model. The first level object of the model is to minimize the purchase and transportation costs of power generation groups in the entire scheduling cycle. The second level object is to minimize the voyage operating expenses
and the third level object is to minimize the inventory and penalty costs of all subsidiaries. Sequential optimization method is used to solve the model. Numerical tests are performed for a power generation group with 12 subsidiaries and the results show that the cost of the overall supply chain system is saved by 800 million RMB
the demurrage cost is reduced by 195 million RMB
and the inventories of all subsidiaries are reduced by 30%. The three-level model has competitive performance in terms of solution efficiency against traditional consolidated models
especially for complex coal shipping problems of multiple subsidiaries.
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