Research On Integrated Rescheduling Method About High-Speed Railway Train Operation Plan And Train-Set Circulation Plan

The "eight vertical and eight horizontal" railway network structure of high-speed rail in China is gradually taking shape,and high-speed rail has become one of the main modes of travel.The high-speed train runs fast,the departure interval is short,and the operation organization is very complex.Once disturbed by emergencies,the scale of delay will expand rapidly,resulting in a sharp decline in passenger service quality.In the existing operation mode,after the emergency interferes with the normal operation order,the dispatcher mostly carries out the dispatching and adjustment work based on his experience.With the continuous encryption of the railway network,the impact scope of the emergency increases,and the dispatching and adjustment work becomes more complex.Simply relying on the dispatcher to manually prepare the adjustment plan may not be able to effectively restore the operation order,Therefore,the research on using an intelligent optimization algorithm to realize the automatic adjustment of train-set circulation plan and train operation plan has important theoretical and practical significance.After combing the relevant research at home and abroad,this paper puts forward the operation adjustment theory and method suitable for different interference intensities under the high-speed railway emergency response system in China.The main research work includes the following points(1)Analyze the departure time and arrival time of blocked trains and the diversion mode of stranded passengers under emergencies.Sort out the emergency response system of emergencies and the response process of typical emergencies,build special operation scenarios corresponding to typical emergencies,and discuss the transformational relationship of scenarios.At the same time,the departure time and arrival time of blocked trains is analyzed,and the impact of blocked trains on the subsequent trains at their running positions is calculated based on the difference of stopping schemes between trains within the framework of trains that can operate normally after the handling of emergencies.Further,by comparing the advantages and disadvantages of different passenger diversion methods,the problem of passenger diversion when the blocked train is forced to cancel is studied.Considering the decline of passengers,the calculation model of passenger diversion scheme is established,and the passenger diversion schemes under different diversion conditions under emergencies are solved based on the Beijing-Shanghai HSR.(2)Build an integrated rescheduling method about high-speed railway train operation plan and train-set circulation plan.Classify the existing operation adjustment means according to the use frequency,analyze the applicability of each complex adjustment means,analyze the benefits of the applicable adjustment means,and propose the necessary,sufficient,and absolute three-level enabling conditions to guide the algorithm.Based on the feasible premise,the operation mode of stand-by train-set is improved,and the operation evaluation model of the stand-by train-set is established to deeply analyze the preference and upper limit of the ability of the hot standby vehicle to relieve the stranded passengers.The results show that the hot standby vehicle has a good ability to relieve the stranded passengers along the way.A short marshalling train reconnection evaluation model is established to evaluate whether the current timetable is suitable for reconnection.Taking the Beijing-Shanghai HSR as the background,it is found that the line has better reconnection conditions,to further clarify that the improved stand-by train-set and short marshalling train can be used in the integrated collaborative optimization method.(3)Study the adjustment method of train operation plan based on the rapid rearrangement of timetable.In order to reduce the loss of service quality as much as possible in the limited remaining operation time,a time-space decomposition method of passenger travel demand is proposed to calculate the stop plan,and an integer programming model is established to minimize the total travel time and consider the safety operation constraints,station capacity constraints and passenger service constraints,A combination method based on local area search is designed to integrate the sub timetable efficiently.Taking the Beijing-Shanghai HSR as an example,the feasibility and efficiency of the method under severe interference intensity are verified.(4)Study the integrated collaborative optimization method of high-speed railway train operation plan and train-set circulation plan of high-speed railway line under medium interference intensity.Under the operation scenario of one-way traffic interruption,a multi-objective optimization model is established with the minimization of service quality loss and the minimization of additional operating mileage as the optimization objectives,and complex adjustment means such as the operation of hot standby train-set,the reconnection of short marshalling trains,the routing adjustment of multiple units,the task cancellation of multiple units and the sequence exchange of interstation passage are used to adjust the operation of multiple units and train operation plan of high-speed rail trunk lines.A fast non dominated sorting genetic algorithm(NSGA-II algorithm)considering the loss of passengers is designed to solve the model under the guidance of three-level enabling conditions,and a case study is carried out based on the BeijingShanghai HSR.The results show that NSGA-II algorithm can assist the decisionmaking of operation adjustment,and the algorithm under the guidance of three-level enabling conditions has higher solving efficiency and quality.In addition,the integrated collaborative optimization method is used to analyze the key nodes of operation adjustment.(5)Study the integrated collaborative optimization method of high-speed railway train operation plan and train-set circulation plan of high-speed railway network under medium interference intensity.According to the operation requirements of the rail network,the adjustment means in the integrated adjustment method are upgraded.Considering the diversion experience of passenger loss and stranded passengers,a multi-objective optimization model covering the corresponding basic constraints,passenger diversion constraints and the coupling constraints of the integrated adjustment means is established with the optimization objectives of minimizing the decline of service quality,minimizing the additional operating mileage,and minimizing the transfer passengers.NSGA-III algorithm suitable for more optimization objectives is designed,and the model is solved under the guidance of three-level enabling conditions.The effectiveness and practicability of the model and algorithm are verified on the road network composed of Beijing-Shanghai HSR,Beijing-Baoding HSR and TianjinQinhuangdao HSR based on actual data.