Comprehensive Optimization Of Train Tracking Interval And Energy Consumption Of High-speed Railway Train

In recent years,high-speed railway in China has been developed rapidly.By the end of July 2020,the operating mileage of high-speed railway in china has reached 36000 kilometers,ranking first in the world.Due to the advantages of high-speed railway such as high speed,reliability and comfort,people’s demand for high-speed railway is increasing.However,with the continuous increase of passengers and oprating length,the energy consumption of the railway system increases significantly.High-speed railway is facing with the double test of transport capacity improvement and energy conservation.Train tracking interval is an important parameter to calculate the passing capacity of a railway line.compressing train tracking intervals can effectively alleviate the strain of railway capacity.In order to save energy on the premise of enhancing the capacity of railway transportation,this paper aims at compressing the tracking interval time and rudeucing running energy consumption.The main contents of this paper are as follows:(1)Based on the existing research,this paper summarizes the calculation methods of high-speed railway train tracking intervals,conducts force analysis on the train,and puts forward the calculation method of operation energy consumption based on the optimal control principle of the high-speed train.(2)The existing speed control method is further studied.The change rules of train tracking interval and operating energy consumption under different speed control schemes are analyzed.(3)The energy consumption optimization method of coasting a certain distance before the braking start point of the speed control value is proposed,and the change rule of tracking intervals under different energy consumption potimization schemes are analyzed in this paper.(4)Based on the force analysis on the train,the calculation theory of EMU traction and the optimal control principle of the train,considering the conditions of stations and lines,the simulation model for comprehensive optimization of train tracking interval and energy consumption of high-speed railway is constructed by using the method of multi-agent simulation.Based on the model,the calculation method of the minimum tracking interval time of high-speed trains is designed.(5)The simulation model for comprehensive optimization of train tracking interval and energy consumption of high-speed railway is applied to verify the effectiveness of the proposed methods.The simulation results show that by using the speed control method,the arrival interval time can be compressed,and the en ergy consumption can be reduced within a proper range of the value of controlled speed.On the basis of setting up the speed control section,if the train coasts a certain distance before the braking start point to the controlled speed in advance,operation energy consumption of the train can be optimized and the interval time of train tracking interval can be further compressed.In the simulation experiment,combining the two methods,the train tracking interval is compressed by 80 s,and the operation energy consumption is reduced by 18% compared with the operation without any optimization method.