Research On Optimization Of Coal Transportation For Energy Enterprise Considering Subsidy Mechanism

Railway transportation is one of the main ways to transport coal from west to east and north to south in our country.There are differences in the freight rates of different railway lines,which often lead to excess capacity of some transport lines.Therefore,in the process of coal transportation,large energy enterprise “how to balance the transport volume of each railway line and achieve the maximum benefit?” It has become a key problem in the integrated scheduling of production,transportation and marketing.Focusing on the relevant practice of coal transportation in large domestic energy enterprise G,this paper focuses on considering the problem of coal transportation under the internal subsidy mechanism,by adjusting the benefit distribution between the internal railway transport department and the coal production department,to maximize the overall benefit of the scheduling plan of energy enterprise.First of all,this paper constructs an optimization model of coal transportation without considering the internal subsidy mechanism,which aims at the overall profit maximization of energy enterprise.Considering the influence of coal price fluctuation,this paper uses the exponential function to describe the quantity-price relationship between the outsourced coal quantity and the outsourcing price of the coal production department,and establishes the optimization model and solution idea with the goal of maximizing the overall profit of the energy enterprise.Furthermore,through the case comparison and analysis of the exponential quantity-price relationship,linear quantity-price relationship and transportation scheme under fixed price.The results show that the coal transportation scheme under the quantity-price relationship described by exponential function is better,which lays a foundation for the establishment of follow-up subsidy model.Secondly,a coal transportation optimization model considering the internal subsidy mechanism is constructed,which aims to maximize the overall profits of energy enterprise.The relationship between the quantity and price of coal outsourced by the coal production department is described by an exponential function,and the internal subsidy mechanism adopts the way that the marginal contribution of coal transported by the railway transport department subsidizes the coal production department to outsource coal according to a certain proportion.The optimization model and solution are established.The model verification and analysis is carried out with the relevant data part of large energy enterprise G,and the calculation results show that the transportation scheme considering the internal subsidy mechanism is generally better than the one without considering the internal subsidy mechanism;after considering the internal subsidy mechanism,the total coal transport volume increased by 7.86%,and the total profit of the enterprise increased by 1.00%.Finally,an optimization model of coal transportation is constructed under the internal subsidy mechanism considering the impact of tax,which aims to maximize the overall net profit of energy enterprise.On the basis of the above quantity-price relationship and the internal subsidy mechanism,considering the coal sales profit income tax of the coal production department and the railway transportation department,and adding the profits of the coal production department and the railway transportation department,the total profit of the enterprise is calculated,and the optimization model and solution idea are established.Through the model verification and analysis of the relevant data part of large energy enterprise G,the results show that the coal transportation scheme after considering tax can make clear the actual benefits of energy enterprise.To sum up,the research shows that the implementation of freight internal subsidy mechanism in energy enterprise can increase the outsourcing volume of outsourced coal,balance railway transport capacity and increase enterprise efficiency.The coal transportation scheme under the internal subsidy mechanism considering the impact of tax can actually reflect the enterprise benefits brought by the internal subsidy mechanism.