Study On Calculation Method Of Train Tracking Interval And Optimization Of Power Supply Partition Of Medium Speed Maglev

The medium-speed maglev with a speed of 200km/h will provide new choices for urban suburban commuting and regional passenger flow due to its low cost,strong terrain adaptability,flexible operation organization and energy saving.Compared with the wheel-rail line,there are big differences in line conditions and train operation control methods,so that the calculation method of the original wheel-rail train tracking interval cannot be applied to the calculation of the medium-speed magnetic levitation tracking interval.At the same time,the medium-speed maglev train operates with the power supply zone as the occlusion zone.The division of the power supply zone will also affect the train tracking interval.In addition,considering the line cost,it is necessary to study the division and optimization of the power supply zone.The main research content of this paper can be summarized as the following aspects:(1)The operating characteristics of the medium-speed maglev train were studied.The resistance of the medium-speed maglev train during operation is analyzed.The related characteristics of the medium-speed maglev power supply zone and the auxiliary parking zone and the impact on the train operation control are studied.Finally,the double-speed speed of the medium-speed maglev train is studied.The protection curve and the safe speed domain lay the foundation for studying the tracking interval of the medium-speed maglev train and the optimization of the division of the power supply zone.(2)The calculation method of tracking interval time of medium speed maglev train were studied.The influence of power supply zone and auxiliary parking zone on train tracking interval time is analyzed,and the tracking scene is divided.The calculation method of train tracking interval time in different scenarios is studied.Finally,the positional relationship between the power supply zone and the auxiliary parking zone is analyzed when the interval tracking interval is the smallest,which provides an important reference for the research of power supply zone division optimization.(3)The optimization method of medium-speed maglev power supply partition division was studied.By comparing the optimization of the occlusion partition of the wheel-rail system,the characteristics of the medium-speed maglev power partition division are analyzed,and the power supply partition division optimization 0-1 planning model with the minimum number of power partitions is established.The model can solve the problem of power supply partition division under the influence of line speed limit and slope,reduce the number of divisions of line power supply division,save line construction and operation cost,and have obvious medium-speed maglev characteristics.(4)The design example is used to verify the tracking interval calculation method and the power partition classification optimization model.The results verify the correctness and effectiveness of the tracking interval calculation method proposed in this paper,and the power partition classification optimization model for solving the speed limit and slope.The problem of power supply partitioning under the influence has good applicability.Finally,the conclusions and prospects of the research content of this paper are summarized and forecasted.