| Electric vehicles(EV)are clean energy vehicles powered by electric energy.If they are allowed to access to the grid on a massive,they will have a series of adverse effects on the reliable operation of the grid.In order to deal with this challenge,this paper uses the dual attributes of electric vehicle mobile load and energy storage power supply to study the problem of electric vehicle participating in the grid dispatching control and communication security through load aggregation technology.The technology of Vehicle to Grid(V2G)achieves the intercommunication of electric energy and information between electric vehicles and the grid,and relieves the passive affect of massive application of electric vehicles on the grid.The grid can guide and encourage electric vehicles to participate in intelligent power consumption through certain incentive means,and electric vehicles can obey the power grid dispatching on the premise of meeting their own needs,so as to achieve intelligent charging management.The charging and discharging dispatching of electric vehicles is based on the communication and control between EV and the grid.The extensive utilization of information and communication technology in the charging and discharging network of electric vehicles will unavoidably cause many secure issues.Therefore,this paper first raises an electric vehicle intelligent charging system architecture based on hierarchical distributed scheduling and supported by edge services,and analyzes its security problems;then,aiming at the possible security problems,this paper studies a security authentication method,which is suitable for electric vehicle charging and discharging scheduling application,and puts forward the corresponding information security solutions.In this paper,a proxy short signature scheme based on bilinear pairing is designed by using proxy short signature technology and PKI certificate mechanism.In addition,in order to improve the speed of certificate verification,a new MHT certificate status checking mechanism is introduced.Finally,a security authentication mechanism applied to the communication entities of electric vehicle,aggregation unit and control center is proposed.The security and performance of this scheme are analyzed.Through the system simulation of the scheme,the security and effectiveness of the proposed scheme are verified. |
