Research On Technical Operation Simulation Of Large-scale Railway Passenger Station Based On Digital Twin

As important nodes of the railway network,large-scale railway passenger stations undertake a large number of technical operations for the departure and arrival of trains.With the gradual growth of China railway passenger traffic and the increasingly frequent demand for railway diagram adjustment,the technical operations of large railway passenger stations have also changed from relatively fixed to complex and changeable.In order to adapt to the ever-changing operation demands,the railway passenger station urgently needs a digital twin station simulation platform that can reflect the current technical operation status in real time,rehearse changes in future operation situations,retrospectively diagnose historical operation conditions,and obtain accurate suggestions from the deduction results.Feedback for the station to make decisions.Therefore,it is necessary to carry out simulation research on the technical operation of large-scale railway passenger station based on digital twin.Based on the theoretical basis of digital twin technology and discrete event simulation,this paper studies the digital twin simulation model for the technical operation process of large railway passenger stations.The main contents include:(1)This paper analyzes the contradictions in the technical operations of receiving and dispatching trains,shunting trains,and technical inspection operations for rolling stocks in the technical operations of large railway passenger stations and the common laws of technical operations in stations with different layouts.The key factors affecting the technical operation of the passenger station are summarized: parallel path constraints,machine adjustment work arrangements.(2)The overall technical mechanism of the digital twin model of the railway passenger station,the main principles of technical operation simulation and the related technical problems in the construction of the logical model are studied,and a general key technical framework of the digital twin simulation modeling of the technical operation for the railway passenger stations is proposed.(3)Based on the above modeling technology framework,combined with the Dalian Railway Station shunting operation planning system developed by the research team in the early stage,a real-time data transmission mechanism between the physical station and the digital model was established,and the digital twin simulation model of the Dalian Railway Station technical operation was developed.The model realizes human-computer interaction and deduction suggestion feedback.(4)Four deduction modes are put forward,namely "daily coordination meeting","plan rationality","adding extra passenger train",and "extreme operating conditions".For the above four modes,simulation scenarios are established,and deduction analysis is carried out.Different deductions are explained.The functional characteristics of the model verify the practicability of the model.The results of the study indicated the following: First,under the condition of existing technical facilities and equipment,the digital twin station simulation platform can solve the problems of prominent technical operation contradictions in large railway passenger stations.Second,the proposed key technical framework of digital twin simulation modeling for the technical operations of passenger stations can provide a technical basis for the construction of digital twins for specific stations.Third,the established digital twin simulation model of Dalian Railway Station can display the technical operation status of the station in real time and complete the simulation deduction of different modes.