The Research On Impacts Of Electric Vehicles On Coupled Traffic And Energy Transportation Networks

In recent years,the shortage of fossil fuels and the environmental problems caused by fuel cars are becoming more and more serious,which makes the development of electric vehicles(EVs)extremely urgent.As the new energy transportation tool,EVs have the characteristics of low noise,high energy efficiency and no mobile waste emissions.The large-scale access of EVs can decrease the energy consumption and reduce the emission of harmful gas.However,EVs charging behavior will aggravate the burden of loads,which threaten the safe and reliable operation of the power grid.As the coupling point between the power grids and the road traffic networks,the role of EVs in coupled traffic and energy transportation networks(CTETNs)is significant.This paper studied the spatial-temporal distribution of charging loads in the power grids and traffic flow distribution in the road traffic networks with a large scale access of EVs.Furthermore,this paper studied the impacts of CTETNs under the road failure.The specific work is as follows:In the study of CTETNs model with EVs: Based on the complex network theory,the power grids and road traffic networks are abstracted as connected graphs with point and side,and the basic mathematical models of the power grids and the road traffic networks are built separately.Then,the model of a single EV is introduced,the classification of EVs and the method of energy supplement are analyzed.Based on the interactions of EVs and power grids,the impacts of EVs charging characteristics on economy and reliability of power grid are analyzed,which provides the theoretical basis for the prediction of the spatial-temporal distribution of EVs charging load in the next step.Based on the travel plan and driving habits of the EV owners,the EVs operating characteristics in the road traffic networks are analyzed,which provides the theoretical basis for the study of the EV tracking simulation in the next step.In the study of spatial-temporal distribution laws of EVs charging loads: Considering the coupling characteristics and interactions relationship between EVs and CTETNs,based on the topological and regional characteristics of the road traffic networks,simulating the EV driving route with its random behaviors.Predicting the spatial-temporal distribution of EVs charging load,then evaluating the impacts of the large-scale EVs access on the power grids by calculating the charging load.In the study of impacts on CTETNs under road failure: In view of interactions scenes with different OD strategy,considering the road betweenness distribution and vehicle flow level,attacking the road deliberately.Then,based on methods of the spatial-temporal distribution of EVs charging load and tracking simulation,analyzing the impacts on CTETNs.In this paper,firstly,analyzing the coupling characteristics and interactions relationship between EVs and CTETNs.Then,by modelling the random behaviors of EVs,proposing a method to simulate the interactions among CTETNs based on a double layer coupled network model.Finally,taking the CTETNs based on IEEE 33 bus system as example to analyzing the interactions.The results showed that the proposed method could reasonably analyze the coupling networks under the road failure.The proposed model and method are feasible and effective.