Analysis Of Urban Electromobility And Its Impact

With the increasing R&D investment in vehicle electrification in different countries and regions around the world,electric vehicles(EVs)have quickly leapfrogged from development and testing stage to mass production and application.As the world's largest automobile production and sales country,China has deemed electric vehicles as an important means to solve the problem of energy security and environmental pollution in the road transportation.However,as an emerging market with a still low degree of motorization,many challenges and potential impacts in the introduction of electric vehicles are still unclear.The purpose of this paper is to evaluate the impact of the introduction of electric vehicles into cities from the perspectives of energy,environment,social equity,and market.The main focus is as follows:life cycle energy consumption and emissions comparison between electric vehicles and conventional vehicles,and improvement of local air quality after the introduction of electric vehicles in cities;possible impacts of an innovative electric vehicle introduction measure on traffic efficiency and social equity;differences in driving behavior and energy consumption of electric vehicles in urban driving scenario and their influencing factors;the market acceptance of EV carsharing and its relevance to other modes of transport in the city.Firstly,the environmental impact study of electric vehicles is carried out from regional and urban scales: regional scale analysis evaluates the fuel life cycle emissions of conventional vehicles and electric vehicles;while in urban scale analysis,Beijing is used as a case to construct “microscopic traffic simulation-traffic emissions calculation-air quality analysis" three-layer simulation model that simulates the impact of different electric vehicle share on local air quality.The traffic impact assessment of the initiative that allows the electric vehicle to use the bus lane is realized through the microscopic traffic simulation model.The traffic simulation model constructed reveals the complexity of the measure: under the current road network in Beijing,when the EV share threshold is exceeded,the travel time and reliability of the bus will be seriously affected.In addition,through the electric vehicle driving behavior test and driving style questionnaire survey in Beijing,the changes of energy efficiency of different electric vehicle drivers are explored.The results show that combined with singular spectrum analysis and hierarchical clustering based on dynamic time warping distance,it is capable of simplifying and deciphering the hidden features of spatial sequence data on energy consumption data,and the driving style questionnaire can also increase the understanding of measured field data.Finally,a questionnaire survey is conducted to study the market acceptance of EV carsharing service and its relevance to other modes of transportation in the city.The constructed consumer acceptance model and the revealed substitutive or complementary relationship of EV carsharing with other modes of transportation will help governments and companies target the group most likely to use the service and more accurately position this service in the urban transport system.This paper finds out that in addition to the limitations of electric vehicle technology itself,there are many factors related to the environment,infrastructure,market,and policy that will potentially affect the actual impacts of the introduction of electric vehicles in China.In order to ensure more positive social benefits when electric vehicles are introduced into cities,national and local governments need to be able to introduce measures after a multi-dimensional and more comprehensive assessment rather than focusing solely on increasing the absolute number of electric vehicles.