Research On Track Utilization Integrated Optimization Methods In Railway Passenger Stations

Railway is a green transportation mode suitable for China’s national conditions and sustainable development which has the following characteristics of high network density,complex hierarchical structure,high intensity of passenger flow and strong organizational relevance,etc.Also,passenger stations are windows of railway passenger transportation.Therefore,as the core of the railway station operation organization,there are mutual influences and restrictions among track utilization in different adjacent stations due to trains operation,same carriages and arrival and departure time.Research results in this dissertation can provide decision-making support for the compilation and adjustment of train operation plan and be conducive to the realization of network and digital intelligent operation and management.Thus,the proposed research has important theoretical value and practical significance.Therefore,a systematic and in-depth study is carried out from the following aspects,i.e.,track utilization coupling in certain station,offline integration and online integration in multi-station.An integrated optimal method for track utilization is put forward to solve its integrated optimization problems in railway passenger stations.The main research contents of this dissertation are as follows:(1)Research status at home and abroad from following aspects,i.e.,train timetabling,operation organization plan compilation and adjustment in railway stations,and operation organization informatization is summarized.Also,technical operation processes and characteristics of track utilization in passenger stations and features for its integration compilation and real-time adjustment are all explored and the influence mechnasim of track utilization integration in railway stations are clarified,and the integration process of multi-station track utilization is clarified.(2)Taking the track utilization coupling compilation in certain station as the research object,a space-time network within the station is designed.Then,considering the constraints of the occupation of tracks and routes,space-time arc occupation and flexible intervention,the track utilization in railway passenger stations coupling compilation optimization model and its flexible optimization model are proposed.Further,their corresponding heuristic solution algorithms are both designed.A track utilization coupling optimimal method considering decision-making preferences of railway dispatchers in railway passenger stations is put forward to solve the coupling optimization problem of track utilization in passenger station considering flexible management effectively,which can improve the balance,robustness and flexibility of the track utilization.(3)Taking the track utilization offline integrated compilation in railway multi-station as the research object,the concept of redundant time is introduced.Taking train operation and station arrival and departure time as links,a bi-level programming model for track utilization offline integration compilation in railway stations considering redundant time is built.Also,by constructing the probability function of random interference of abnormal events,the redundant time generation algorithm and offline integration compilation optimization algorithm are designed.An optimization method with redundant time of track utilization offline integrated compilation in railway passenger stations is proposed to deal with the offline integrated compilation problem of track utilization in mutilple railway passenger stations reasonably,which can mitigate the inter-station impact of the track utilization of adjacent passenger stations,and gradually reduce the impact of abnormal emergencies on the track utilization of subsequent passenger stations.(4)Taking the track utilization online integrated real-time adjustment in railway multi-station as the research object,an evaluation function for its secondary anti-interference ability is designed.A bi-level programming model for track utilization online integrated real-time adjustment in multi-station is put forward,and a heuristic solution algorithm is given.Thus,an online integrated adjustment optimal method considering volatilities,secondary anti-interference abilities and balanced uses for track utilization is given to deal with the strong timeliness problem of track utilization online integrated real-time adjustment in mutilple railway passenger stations successfully,which can formulate a reasonable online integration and adjustment plan for multi-station track utilization in a very short time.42 figures,15 tables,167 references are included in this dissertation.