Carbon Emission Analysis Of High-speed Railway In Operation Stage

Sustainable economic development,as one of the basic requirements of the scientific concept of development in China,requires the coordinated development of nature,society,science,technology and economy.China's atmospheric environment problem is still severe,and our country actively seeks ways to save energy and reduce emissions,requiring all walks of life to pay more attention to environmental protection.Transportation industry is no exception.High-speed railway develops rapidly with its characteristics of high speed,low carbon,safety and punctuality.In order to understand the impact of high-speed railway on the environment,it is necessary to study the emission characteristics of high-speed railway.The greenhouse gases in the operation stage of high-speed railway are selected as the research object and to analyzed.Based on the life cycle theory of high-speed railway,the carbon emissions generated in the operation stage of high-speed railway are divided into three parts: the carbon emissions generated by traction energy consumption of EMU,the carbon emissions generated by energy consumption to maintain the daily operation of stations,the carbon emissions generated by energy consumption or material replacement in the maintenance process of lines.The research boundaries of each part are studied and the carbon dioxide emission computational models of each part are established.By using the method of mathematical statistics,this paper analyses the characteristics of carbon emissions in the operation stage of high-speed railway,calculates the contribution value and contribution rate of each factor to the carbon emissions in the operation stage of high-speed railway by using the method of Logarithmic Mean Divisia Index,and identifies the main factors that restrain the growth of carbon emissions.The research shows that the carbon dioxide emission from traction power supply system is the largest in the whole operation stage of high-speed railway.In terms of time characteristics,the carbon emissions of traction power supply system are in spring significantly lower than the other three seasons.Carbon emission from station operation system has distinct charactors according to four seasons.With the decrease of station grade,the per capita carbon emission index of unit station area becomes larger and larger,while the per capita carbon emission index of unit station area becomes lower and lower with the higher grade of the city where the station is located.From the results of decomposition of influencing factors,the carbon emission factors of energy and energy consumption per unit turnover have a strong inhibitory effect on the growth of carbon emissions of high-speed railway.Based on the prediction and analysis of power carbon emission factors,specific measures for energy saving and emission reduction are put forward.