The Analysis Of Energy Consumption And The Research On Energy Saving Measures Of Urban Rail Transit Station Power System

Saving resources and protecting the environment are the basic national policies of our country.In the environment of our country's economic and social growth,the demand of urban traffic travel is increasing.With the increasing of the passengers flow,the energy consumption of urban rail transit is increasing rapidly,and the proportion of energy consumption accounts for the proportion of operating cost.Based on the project named "comprehensive research and application demonstration of green environmental protection and energy saving for urban rail transit" by Beijing city construction and Design Development Research Institute,this thesis takes urban rail transit stations as the research object,comprehensively investigates and summarizes the current situation and problems of energy consumption of Metro mechanical and electrical system,and puts forward to the classification energy efficiency index body of Metro mechanical and electrical system.The energy consumption of the power system of the subway station is modeled by a suitable algorithm,and analyses the influenced factors of the energy consumption,and the modeling and simulation of the control strategies of the power system are carried out based on the Petri network.This thesis firstly analyses the characteristics of urban rail transit network,then summarizes the characteristics of energy consumption and finds out the factors which influence the energy consumption of different systems.Combined with the characteristics of urban rail transit,the framework of the three-level energy consumption index system is set up by the analytic hierarchy process,and the conception of standard station is put forward,and the energy consumption of the unit is used.The unit energy consumption of different lines is calculated by a certain coefficient,and a calculation formula is formed.The efficiency of energy saving measures is measured by calculating the energy saving ratio according to the energy consumption before and after the energy saving.Then modeling and analysing the three main parts of the urban rail transit power system which includes the environmental control ventilation system,the power lighting system and the escalator system.A mathematical regression model is established by using the linear regression method between the station's heat load and the independent variable station area.For the power lighting system,the power consumption is calculated by lighting power density.For the escalator system,the linear relationship between the operating power of the elevator and the speed of the elevator as well as the rate of the load is studied.A linear regression model of each element is established and the significance test is carried out to predict and analyze the energy consumption of the station more accurately.Finally,the Petri net theory is used to model the dynamic system of urban rail transit station,and the Petri network model is established according to the operation mode of the subway station and the simulation,and then carry out the result analysis on the Visual Object Net++ platform.The loop control ventilation system is divided into the morning mode and the operation mode,and the cooling water system is also modeled.The feasibility of the energy saving measures is simulated by the load and conversion control strategy adopted by the chiller,and then the working mode of the power lighting system is simulated,and we can get the operation results as expected.It is expected that energy-saving measures can be carried out normally.