Research On Planning And Evaluation Problems Of Arrival And Department Track Allocation In High Speed Railway Junction Station

As the basic unit of high speed railway transportation, high speed railway junction station centralizes various passenger transportation technical equipment and participates in the entire transport process in all operational aspects. Comparison with the general high speed railway station, high speed railway junction station links multiple directions and contains many railway platforms and arrival and department tracks. On the one hand, its station operation organization is complex; on the other hand, passengers have high demands for service quality. Operation plans of junction station, especially the planning and optimization of arrival and department track allocation are becoming more and more important and has theoretical research value and practical significance.Previous studies have focused on the analytical aspects, such as mathematical modeling, improving of objective function and constraint conditions and using intelligence algorithm to solving the model and so on. As an important complementary to analytical method, simulation method can effectively compensate the evaluation deficiency of analytical method. This paper focuses on the evaluation and planning of arrival and department track allocation in high speed railway junction station, mainly includes the following aspects:1. Technical operations process analysis of high speed railway junction station. First, we classify high speed railway station with different types and analyze influence factors in the planning of arrival and department track allocation in high speed railway junction station, which includes:technical equipment, main operations and technical processes.2. Establish multi-objective optimization model for the planning of arrival and department track allocation in high speed railway junction station. On the basis of principles for track allocation, we proposed the multi-objective optimization model that give consideration to the balance of arrival and department track allocation and passenger’s convenience, which has some complexity. We propose algorithm based on immune clonal selection algorithm, design antibodies, affinity function, coding variation rules and algorithm termination conditions.3. Establish simulation evaluation model of arrival and department track allocation in high speed railway junction station based on Hierarchical Timed Colored Petri Net. At the station infrastructure simulation modeling, using top-down design idea, turnout is defined as Substitution Transition and section is defined as Place at the top level; time control function, turn back control function,direction control function, track selection control function and evaluation index statistics function are achieved at the underlying turnout subnets level. CPN Tools is used to build the simulation system, C#program is used to build integrated systems of evaluation and planning of arrival and department track allocation in high speed railway junction station.4. Take typical high speed railway junction station Zhengzhou East Station as an example for analysis. Using the integrated systems of evaluation and planning of arrival and department track allocation, we generate the plan of arrival and department track allocation in Zhengzhou East Station and the evaluation of indicators of track allocation. Finally, we get the conclusion that the plan generated by the model has improvement in both the balance of arrival and department track allocation and passenger’s convenience to some degree in comparison with the plan made by the dispatch, which verify the validity of the model.