Energy-saving Optimization Method Of Train Scheduling And Cooperative Control Of Train Meeting For Single Track Railway

In recent years,China’s railway industry has developed rapidly.The proportion of single track railway in China’s operating lines is still high.Train scheduling of single track railway is a very complex problem.The energy consumption of train operation is the main energy consumption of railway.With the development of society,energy saving has been paid more and more attention.This dissertation conducts some research on train scheduling for single track railway energy saving,and the main contents are as follows:(1)First of all,the calculation method of energy consumption for the operation of diesel locomotive has been studied.Based on the train dynamic model and Regulations on Railway Train Traction Calculation,the calculation process of train energy consumption is analyzed,and then the locomotive power curve,traction characteristic curve,fuel consumption curve and other curves are fitted.(2)The two-layer structure method is constructed to optimize real-time train diagram for energy saving.At first,a feasible train diagram is generated according to the principle of “first come,first served”,and then each train meeting process is optimized in chronological order.Firstly,two cases are classified according to whether or not changing the order of train meeting.And then the train meeting scheme is optimally calculated for both cases.The results show that the maximum of energy saving is between 3.06% and 5.36%,and the algorithm calculation speed is very fast.(3)The optimization method of train scheduling for single track railway under the condition of closing the section is studied.Firstly,a method is proposed to prevent the train from operation deadlock on single track railway.Secondly,in order to improve the optimization results based on the “first come,first served” principle,a method of changing the train meeting station with relative priority is proposed.Taking the departure time of the first train after the section open,the arrival and departure time of the trains influenced by the section closing as the decision variables.Selecting the train departure headway,dwell time,and stop times as the optimization objectives.The multi-objective optimization model and solution method of the train diagram are studied.The results of simulation show that the train dwell time is reduced by 64 min,while the total number of stops involved remained the same.(4)An optimization method of non-stop meeting on single track railway based on multi-train coordination is studied.Referring to the experience of the actual train meeting,the process of non-stop meeting is analyzed,and the feasible conditions such as train length and effective length of track to realize the non-stop meeting are determined.The multi-objective optimization models are established for two scenarios,and the rule-based calculation method is used to generate the distance-speed curves of meeting trains.The optimization method of the non-stop train meeting is verified by the simulation.The simulation results of typical scenario show that the margin of non-stop time for the train that passes through the station satisfy the requirement of the non-stop train meeting.In this dissertation,the simulations are carried out based on the Dalailong Railway,and the simulation results show that the algorithm is fast and the indexes including energy saving of train operation are satisfactory.This dissertation provides theoretical support for the practical application of the train scheduling algorithm on site.