Study On Comprehensive Energy Consumption Evaluation And Traffic Organization Strategy Optimization Of Urban Rail Transit

With the development of urban rail transit,the operation energy consumption of urban rail transit system is increasing year by year,and the total amount of electricity is huge.Only the Beijing subway consumes more than 1.4 billion kilowatt hours in one year.How to save the operation energy consumption of urban rail transit on the basis of ensuring the service level has important theoretical and practical significance.Scholars at home and abroad in terms of energy saving operation of urban rail transit has a lot of fruitful research,but mostly just unilateral or station ventilation and air conditioning energy consumption in train traction energy consumption study,the two types of comprehensive energy consumption accounted for more than 60% of the overall energy consumption,and are affected by the distribution of passenger flow,A reduction in one energy consumption may lead to an increase in another,therefore,it is necessary to comprehensive energy consumption of two types of system energy saving strategy research.Based on the above background,this paper first comprehensive operating energy consumption of urban rail transit are analyzed in detail,the urban rail transit is established,a comprehensive method for evaluating the operating energy consumption of fine and then established the train operation organization strategy based on integrated operation energy consumption optimization model and algorithm design,finally,the paper in Beijing metro line no.8,for example verifies the case,the main content of the paper is as follows:1)The comprehensive operation energy consumption of urban rail transit is analyzed.On the basis of previous literature,this paper makes a systematic analysis of the composition,the proportion of each part's energy consumption,the production process,influencing factors and mutual relations of the comprehensive operation energy consumption of urban rail transit,and summarizes that the comprehensive operation energy consumption of urban rail transit mainly includes train traction energy consumption,station ventilation air conditioning energy consumption and elevator energy consumption.The energy consumption of train traction is affected by the interval running time and the number of passengers on the train.The energy consumption of station ventilation and air conditioning is affected by the outdoor air parameters,the time of passengers waiting at the station and the train departure frequency.The energy consumption of the elevator is affected by whether there are passengers going in and out of the station during the period.Through analysis,it is found that the energy consumption of train traction and station ventilation and air conditioning are jointly affected by train operation organization and passenger flow fluctuation,and it is necessary to carry out comprehensive optimization.2)A comprehensive energy consumption assessment method for urban rail transit operation is established.Due to circuit design,electricity meter installation and other reasons,the existing urban rail transit system can't accurately measure the operation energy consumption of each part.In order to solve this problem,the paper constructs an evaluation method of energy consumption in the comprehensive operation of urban rail transit.On the basis of considering the influence of time-varying passenger flow,this paper puts forward a refined evaluation method of energy consumption in the comprehensive operation of urban rail transit.3)The optimization model of urban rail transit operation strategy based on comprehensive operation energy consumption is established.Based on the evaluation method of comprehensive operation energy consumption of urban rail transit,an optimization model of urban rail transit operation organization is established to save comprehensive operation energy consumption,and a genetic algorithm is designed to solve the model.4)Taking Beijing Subway Line 8 as an example,the comprehensive operation energy consumption of the line is evaluated,and the model and algorithm are validated.First studies the three scenarios,respectively is the station ventilation and air conditioning energy consumption minimization,train traction energy consumption minimization,passenger travel time and the goal of minimizing energy consumption operational comprehensive plan,analyzing the distribution of passenger departure time and the influence of the distribution of target;Finally,the passenger travel time and comprehensive operation energy consumption are minimized,and the schedule is optimized with different weights to test the sensitivity of the model.The validity of the model is verified.It is found that the energy consumption evaluation method proposed in this paper can be used to systematically evaluate the energy consumption of urban rail transit.The proposed optimization method of traffic organization strategy based on comprehensive operation energy consumption can effectively reduce comprehensive operation energy consumption through schedule optimization.Further research shows that increasing the train load rate and increasing the running time of the train range can reduce the train traction energy consumption.Uniform distribution of passengers in the station can reduce the station ventilation and air conditioning energy consumption.