| High-speed railway transportation has high efficiency and good punctuality,and has significant advantages compared with other transportation methods.It has alleviated the situation of Chinese long-term railway transportation capacity shortage,low transportation efficiency,and low service level,which has greatly promoted the social and economic industry.development of.Compared with ordinary speed trains,the operation of EMUs has an absolute speed advantage,and its operating energy consumption has increased dramatically.In particular,as the focus of my country’s high-speed rail construction shifts from the eastern plains to the more complex western regions,a large number of high-speed trains will be put into operation on complex terrain lines,which will also consume more energy and increase operating costs.In order to deepen the development concept of railways "strengthening standards,improving quality and efficiency",and further improving the quality of "high-speed rail business cards",it is necessary to study energy-saving and emission-reduction schemes for high-speed railways with complex terrain and to do better and stronger railway transportation.This paper focuses on the outstanding energy consumption of Xicheng High-speed Railway in the ultra-long and large ramp section,and proposes energy-saving optimization solutions from the aspects of optimizing the stopping plan to reduce the operating energy consumption of the EMU and recovering and utilizing regenerative braking energy.Did the following research work:(1)From the perspective of measuring EMU’s functional consumption,explain the measurement method of EMU’s energy consumption under different working conditions,and define the main working conditions of EMU energy consumption.Using the train traction simulation method,the impact mechanism between the traction energy consumption of the EMU and various factors is analyzed from the perspective of infrastructure equipment and operation organization.Secondly,analyze the principle characteristics of the EMU braking system and the mechanism and utilization form of regenerative braking energy generation.(2)Starting from the perspective of increasing the energy consumption of the super long and big ramp EMUs,and compressing travel time without changing the pure running hours and stopping rates of the trains in the long and ramp sections,a proposal based on energy saving The train stop plan of the timetable,and the construction of a dual-objective planning model,using fuzzy mathematical programming method,to achieve the reduction of EMU operating energy consumption while reducing travel time.(3)Considering the richness of regenerative braking energy in the ultra-long and large ramp section of Xicheng High Speed Rail,analyze the principles,characteristics and energy dissipation process of the current EMU braking system,compare the advantages and disadvantages of the use of regenerative braking energy,and aim at There are a large number of long ramp sections on the Xicheng high-speed railway line,but the regenerative braking energy is not used effectively.A scheme is proposed for the EMU regenerative braking energy to be directly utilized by the uphill traction train.Combined with the basic law of linkage between EMU operation energy consumption and operation diagram,considering the combination of operation organization and train energy-saving operation to optimize the energy-saving operation diagram of high-speed railway trains,it is proposed to match up and down train operation lines on the same power supply section of the long ramp Improve the utilization rate of regenerative braking energy.Construct an integer programming model,and use genetic algorithm to calculate the maximum overlapping time between regenerative braking conditions and traction conditions between EMUs on long ramps.The calculation results show that the energy saving effect is significant. |
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