Research On Energy Distribution Method Based On Power Packet

It is the future development direction to upgrade the power grid to a physical network system which compatible with multiple power transmission modes.The DC power packet dispatching system can solve the power fluctuation caused by the integration of renewable energy into the power grid and the power loss caused by the AC-DC conversion.According to the electric energy demand of different loads,the electric energy is transmitted to the distributed load in the form of power packet to realize the instant use of renewable energy and the on-demand supply of loads.The power packet can not only adjust flexibly the size of its payload for controlling the amount of power transmission and achieving precise energy distribution,but also power packets of different voltage levels can be transmitted on the same power line by time division multiplexing.Therefore,based on the power packet,this paper conduct separately research on solving the problem of imbalanced power utilization in the mobile edge computing(MEC)system,improving the security of power transactions for residential users and reducing the power distribution system’s dependence on the energy centralized manager.Firstly,a DC energy distribution method for the MEC server based on the power packet is proposed to solve the problems of unbalanced power utilization caused by the randomness of service request volume in MEC server network.Based on the transmission loss and the maximum transferable capacity of power packet router,a routing and energy allocation optimization model with the objective function of maximizing the satisfaction of each MEC server is established,then the one-to-many matching game and the improved non-dominated sorting genetic algorithm II(NSGA-II)is used to solve the problems respectively.Finally,according to the energy distribution result,the power packet router forwards the power packet generated by the renewable energy supplier to the matched MEC server.The simulation results verify the feasibility and superiority of the proposed model and method,realizing precise energy supply and saving electricity.Secondly,aiming at the users that use renewable energy power generation devices,in order to solve the problems of excess energy of these users,the strong dependence of the system on the energy concentration manager,the security and privacy protection in the transaction process,a multiple community energy trading system based on the consortium blockchain architecture is proposed.In the matching stage of power transaction,the system cost is minimized as the optimization objective,and the minimum-cost maximum-flow Vickrey-Clarke-Groves(VCG)algorithm is adopted to obtain the matching set of supply and demand and the transmission path,at the same time,the participants can obtain the maximum benefit only when the real price is quoted.In the power packet scheduling stage,considering the transmission characteristics of power packets by time division multiplexing technology and the time synchronization problem among different power packet routers,Lagrange relaxation heuristic algorithm is used to solve this problem.Then,according to the scheduling scheme,the power packet is double-encrypted to transmit the power to the destination terminal safely and accurately.The simulation results show that the proposed power transaction matching and power packet scheduling scheme can make the transaction information transparent,reduce the system cost,improve the stability and utilization of the system.