Optimization method for train operation plan between intercity railway lines based on interconnectivity
The scale of intercity railway network in major metropolitan areas in China is becoming increasingly complete.Improving the level of interconnection between different lines has become a demand to further enhance network efficiency and optimize service quality.The formulation of train operation plans for intercity railway lines based on interconnection can be summarized as a comprehensive optimization problem of train routing and frequency of trains under two passenger flow transportation modes of inter-operation and inter-transfer,by considering the given interconnection conditions.Waiting time,boarding time and transfer time were considered components of passenger flow travel cost.The model classifies passenger flow OD according to the section positions which their starting and ending belongs to and the set of their chosen train,constructs travel paths by category and analyzes the path selection rules of passenger flow based on path cost.The operation cost was calculated based on the number of train-kilometers traveled.The objective function aimed to minimize the comprehensive cost of the system composed of operation cost and passenger travel cost.The constraints include passenger flow transportation capacity,line throughput capacity,train operation frequency and the stops of cross-line train.Based on the objective function and constraints,an optimization model for train operation plan under the condition of intercity railway interconnection was constructed.A combination search and solution method based on train routing and operating frequency was designed based on the mutual substitution relationship between two modes of interconnection train.Besides,a train operation plan was formulated and solved for interconnectivity between Dongguan-Huizhou Intercity Railway and Guangzhou-Shenzhen Intercity Railway,with the cross-line train route from Shenzhen Airport Station to Chenjiang Station.As the cross-line passenger flow increases,the cross-line train route gradually extends to Xiaojinkou Station.Large station express trains have certain advantages over station stopping trains and the best operating effect when the stopping ratio is around 50%.The results show that the mode of stopping cross-line trains at large stations can achieve synchronous decrease of passenger flow cost and train operating cost.The optimization method can provide decision support for the organization of intercity railway interconnection transportation.
万方数据
维普
