Coordination And Dispatching Of Energy Grid With Electric Vehicle Aggregated

The construction of a modern energy system with the themes of carbon peak and carbon neutrality has become the mainstream of today.Electric vehicles,electricity-gas interconnection and other facilities have become important carriers to promote the construction of low-carbon energy networks,among which electric vehicles have become the current new energy process One of the main representatives in China,not only can reduce the domestic energy consumption structure’s dependence on petroleum fuels,and reduce carbon dioxide emissions;it can also provide mobile energy storage resources for the grid through the interaction of electric vehicle aggregated with the grid,which can be used in peak shaving,filling valleys,and rotating Play a role in backup and auxiliary services.Incorporate clean energy natural gas into the energy supply side,use gas turbines and other equipment to achieve deep interconnection between electricity and gas within the energy grid,and achieve safe,reliable,and economical coordinated dispatch between the distributed energy supply side and the uncertain energy consumption side.This article introduces measures such as demand response principles and time-of-use electricity prices into the energy grid,and combines the principles of multi-energy complementarity to introduce the dispatching of new energy electric vehicles in the energy grid system:(1)To promote the absorption of wind power and reduce the load pressure on the grid,and realize the energy flow within the electric vehicle cluster and the system,the electric vehicle energy storage energy modeling and energy coordinated dispatch strategy are proposed.First,perform energy storage energy modeling for the behavior characteristics of single electric vehicles after they are connected to the grid,build an electric vehicle cluster energy storage energy model based on the response capabilities of electric vehicles in different states of charge,and use multiple electric vehicle aggregated based on the difference in cluster energy storage capabilities Participate in system energy scheduling.Secondly,the cluster energy storage system dispatches the charging/discharging of each electric vehicle power battery,making full use of the continuous regulation capability of the electric vehicle cluster to connect to the power grid.The above energy coordinated dispatch strategy can reduce the fluctuation of grid load after large-scale electric vehicles are connected to the grid,realize the internal power flow of the mobile energy storage system of electric vehicles,and effectively reduce the configuration of conventional energy storage capacity.(2)To stabilize the grid load fluctuations caused by large-scale electric vehicles entering the grid,and realize the low-carbon operation of the energy network,the energy grid dispatching based on the electric vehicle cluster under demand response is proposed.P2G(Power to Gas P2G)technology is combined to couple the energy between the power system and the natural gas system.First,introduce demand response strategies to establish load-side time-of-use electricity prices,and guide large-scale electric vehicle aggregated to change energy consumption periods;secondly,use gas turbines and P2 G devices for electrical-gas energy coupling,which increases the diversity of energy supply sides and effectively improves energy usage efficiency.Finally,taking the optimal economy as the objective function and considering the environmental factors of carbon emissions,a low-carbon energy network model is established,which proves that the participation of electric vehicle aggregated in the energy network can effectively reduce system operating costs and user energy costs,and increase the rate of wind power consumption.(3)To improve the clean energy consumption rate and solve the problem of insufficient energy dispatch on the load side,an optimized dispatch for the load level and the multi-energy co-supply dispatching layer is proposed.First,the load layer fully considers variable loads such as distributed electric vehicle aggregated for classification and modeling,and then transfers or reduces the load through the source-load coordination model,matching wind power output timing to increase clean energy consumption;secondly,multi-energy co-supply The dispatching layer selects the type of system energy supply according to the market electricity price,and coordinates and optimizes the power curve of each operating equipment.Finally,the tabu-cell membrane hybrid algorithm is used to solve the scheduling model,and the final results show that the dual optimization scheme of load level and scheduling level can optimally reduce system operating costs and increase wind power consumption rate,and coordinate and optimize the output configuration of gas turbines,wind power and power grids.