Optimal Scheduling Of A Virtual Power Plant With Electric Vehicles

After into the 21 st century,due to the increasing environmental pollution and the gradual exhaustion of fossil energy,many countries have begun to vigorously promote the use of new energy.Therefore,the utilization rate of new energy generation is rapidly increasing.However,the volatility problem became prominent after the grid connection,which led to a decline in power quality.Smart grids ensure the flexibility of the load side by introducing controllable loads such as electric vehicles(EV),but as the scale of electric vehicles continues to increase,it will have an impact on the safety and stability of the load demand side.For the general trend of the development of electric vehicles,its development still has more advantages than disadvantages.Therefore,how to solve the problem of grid connection of new energy and the impact of electric vehicles into the grid has become a top priority,experts and scholars put forward the concept of virtual power plant(VPP).The particularity of virtual power plant ensures that geographically dispersed clean energy and energy storage systems and loads can be aggregated into a special power plant,the virtual power plant has opened a new path for grid-connected mode.In this context,this paper has conducted preliminary research on related topics,and the paper mainly completed the following research work:Firstly,the paper analyzes the overall operating characteristics of the virtual power plant in terms of the concept,characteristics,and control methods of the virtual power plant.And by introducing the difference between virtual power plant and micro grid,it further demonstrates the advantages of virtual power plant on grid connection.The characteristics and models of the uncontrollable power supply inside the virtual power plant are described.Secondly,In view of the randomness and intermittentness of the new energy power generation gathered in the virtual power plant,this chapter constructs a virtual power plant operating structure with the participation of electric vehicles.Based on the time-of-use electricity price mechanism and considering the operating characteristics of each unit within the virtual power plant,this chapter proposes the corresponding virtual power plant operating strategy and process.In the simulation process,the fmincon function and particle swarm optimization algorithm are used to optimize the output of the unit at each time,and the influence of the controllable unit on the economic benefits of the virtual power plant is analyzed.The simulation results show that the reserved spinning reserve can basically smooth the output deviation of wind power and photovoltaic power under the combined output of electric vehicles and gas turbines,which ensures the reliability of the power supply of the virtual power plant and the economy of the virtual power plant.Finally,In order to respond to the national slogan of "low-carbon power" and "green development" and reduce environmental pollution.On the basis of the economic dispatch model established in the previous article,the carbon trading mechanism and environmental pollution issues are integrated into the optimal dispatch of virtual power plants,This chapter constructs a virtual power plant economy and environment dispatch model taking into account the carbon trading mechanism and the cost of emissions.This chapter explains the interaction between the virtual power plant and the power system when participating in carbon trading,and proposes the corresponding operation process.In the simulation process,the chaotic particle swarm optimization algorithm based on the improved inertia weight is used to optimize the actual output of the gas turbine,electric vehicle and energy storage battery inside the virtual power plant at each time,and analyze the impact of internal units on the economic and environmental benefits of the model.The simulation results show that the introduction of carbon trading promotes the consumption of new energy,reduces carbon emissions,and the overall benefits of virtual power plants are better,which has certain practical significance.