Planning Method And Software Of Electric Vehicle Charging Facilities Considering The Coupling Relationship Between Transportation And Power Networks

Traditional fuel vehicles consume fossil energy.The tail gas emitted by their combustion contains not only carbon dioxide,but also toxic gases,which seriously affects the urban environment and is not conducive to energy conservation and emission reduction.As a "lowcarbon" means of transportation driven by electric energy,electric vehicle(EV)has been widely regarded as the main development model of vehicle transformation in the future.Its carbon emission is much lower than that of fuel vehicle.With the continuous improvement of the number of electric vehicles and the deepening integration of transportation and power system,the reasonable planning of electric vehicle charging facilities is not only the guarantee for the sustainable development of electric vehicles,but also the premise for the coordinated and positive development of transportation and power networks.Therefore,based on the coupling relationship between transportation and power,taking into account the satisfaction of traffic users,the operation cost of distribution network and the low-carbon income of charging facilities,this paper carries out the planning and research of electric vehicle charging facilities.The main contents are as follows:1)The mathematical model of traffic power coupling system is established.In terms of transportation network,firstly,the basic elements of transportation network are defined,including topology,road carrying capacity,road free passage time and O-D point pair.Secondly,the traffic flow allocation is modeled in detail,and it is determined that the principle of random user equilibrium will be used for traffic allocation in this study.In terms of power network,electric vehicle charging facilities are mainly connected to the distribution network.Therefore,the branch optimal power flow model is adopted for power network modeling,and the active distribution network components are considered to increase the universality of the model.In terms of the coupling relationship between the two networks,take the charging facilities as the link and consider the interaction relationship between the two networks for mathematical modeling.2)Research on the planning method of electric vehicle charging facilities considering the coupling relationship between the two networks.Firstly,based on the models of transportation network and distribution network,aiming at the cost of user satisfaction,the lowest operation cost of distribution network and the highest low-carbon income of charging facilities,and considering the constraints of the coupling relationship between the two networks,a planning method of electric vehicle charging facilities based on the coupling relationship between the two networks is proposed.Secondly,aiming at the mathematical model in this programming method,the original programming model is transformed into a bilevel programming model,the relevant model constraints are optimized,and a solution method based on the idea of branch and bound is proposed to reduce the difficulty and time of solving the model.Finally,the effectiveness of the planning method is verified and the performance of the algorithm is analyzed based on the basic example of the coupling of 12 node transportation network and33 node distribution network and the example considering the expansion of transportation network.3)Design of charging facility planning result display system based on Matlab GUI.Based on Matlab GUI platform and the electric vehicle charging facility planning method in this study,a charging facility planning result display system is designed and developed.Based on the scenario of the basic example,the system can run effectively on the computer,complete the solution function,and show the solution progress in the solution process.The final planning results are displayed in the form of images,tables and data.