Study On Energy Saving Operation Optimization Of Urban Rail Transit Train

With the rapid development of urban rail transit,the operating mileage of rail transit network is increasing year by year,which brings prominent problems of operation energy consumption.According to the Ministry of Transport,The annual electricity consumption of China’s urban rail transit is increasing year by year.Research on energy saving and consumption reduction of urban rail transit has become an important research topic in China’s urban rail transit industry.Through sorting out the distribution of energy consumption in urban rail transit operation,the energy consumption of train traction accounts for about 30%-60% of the total energy consumption in operation.Therefore,it is very important to carry out the research on energy-saving operation of urban rail transit trains to improve energy utilization rate and reduce energy consumption in line network operation.Taking the energy-saving operation of urban rail transit trains as the research object,this paper improves the absorption efficiency of regenerative braking energy by adjusting the train operation chart on the basis of increasing the idling time to reduce the energy consumption of train section,so as to achieve the ultimate goal of operation energy saving.the main research contents are as follows:(1)Analysis of energy consumption distribution and energy-saving strategy of urban rail transit operation.This thesis focuses on the analysis of the influencing factors of urban rail transit operation energy consumption,and then discusses the energy-saving strategies to reduce traction energy consumption from the aspects of line characteristics,train attributes,train braking regenerative energy utilization and transportation organization mode,which will provide a theoretical basis for the following research on train operation optimization.(2)Study on energy saving operation optimization of single train.By analyzing the "four-stage" energy saving operation strategy of the train in the interstation interval and combining with the train kinematics theory,the energy consumption of the train in the interval operation force and different traction and braking strategies are analyzed.Aiming at the optimal energy consumption of the train in the interstation traction,a saving model of the interval operation time and traction energy consumption is constructed.The research shows that the energy consumption of train interval can be effectively reduced by increasing the idle running time,and the optimal running time of each interval of Line 1 can be calculated by using the resource allocation algorithm.(3)Study on optimization of energy saving operation diagram of multiple trains.Through analyzing the principle of regenerative braking can produce,has been clear about the energy-saving running optimization of objective function and constraint conditions,optimizing and adjusting the train running diagram of train headway,stop the time parameter,build the train more energy-saving running optimization model,and with time and space local rolling optimization theory to model algorithm.(4)Example verification.Taking morning peak hours of Shijiazhuang Metro Line 1 for optimization and coordination,the results of the example analysis show that the absorption efficiency of regenerative braking energy can be effectively improved by increasing the overlap time of traction and braking of trains in the same power supply area and redrawing the running diagram of energy-saving trains,which verifies the effectiveness of the algorithm.