Study On Low-carbon Economic Scheduling Of Electric Vehicle Charging/Changing Station And Virtual Power Plant With Carbon Capture Technology

With the goal of "carbon peaking and carbon neutrality" in our country,large-scale wind power grid connection is the general trend,but its own peak regulation characteristics and the randomness and volatility brought by the connection to the grid will increase the peak regulation pressure of the system,resulting in wind power curtailment problems.At the same time,the high carbon emission characteristics of traditional thermal power plants can no longer meet the requirements of current low carbon development.The high carbon emission characteristics of traditional thermal power plants can not meet the requirements of low carbon development.It is considered to add a carbon capture system to the traditional thermal power unit to form a carbon capture power plant.By utilizing its good low-carbon performance,the carbon emissions of the system can be reduced.However,there is still some improvement in the aspects of low-carbon performance and rotary reserve.Virtual power plant that realizes remote resource aggregation can optimize and coordinate each component,while wind power plant and carbon capture power plant have good compatibility,which can form wind power and carbon capture virtual power plant through energy supply relationship,so as to realize the complementarity of resources on the source side and promote the low-carbon development of the system.Under the strong support of national policies,EV charging/changing stations develop rapidly,but the randomness of EV users’ participation in grid scheduling and the energy exchange between battery and grid in the station cannot be ignored,and EV participation in grid scheduling is helpful to promote the green and low-carbon transformation of electric power system.To sum up,in this paper,wind farms and carbon capture power plants are integrated into virtual power plants at the source side,and relevant strategies for charging/changing power stations are formulated at the load side.Through coordination and complementarity of source and load,low-carbon economic scheduling of the system is realized.Firstly,in order to solve the problem of low utilization rate of power changing service,this paper develops a pricing strategy and dynamic control method of power changing service considering user participation.According to the consumer psychology principle of electric vehicle users,the service price difference-user engagement curve is constructed.The group decision-AHP method considering the objective weight of experts is used to develop the pricing strategy of power changing service,and the dynamic control method is proposed.In order to optimize the system load and promote the low-carbon economic dispatching of the power system,the charging and discharging strategy of the changing station is formulated in this paper.On this basis,the low carbon complementarity between the wind power-carbon capture virtual power plant at the source side and the charging and discharging power changing station at the load side is explored,which lays a theoretical foundation for the subsequent research on low carbon economic scheduling.Secondly,based on the pricing strategy and dynamic control method,a two-layer optimal economic dispatching model of micro-grid combined system including charging and changing stations is established.By taking user satisfaction as the feedback index,the electricity price of changing service can be adjusted in real time.The results of the example show that the pricing strategy and dynamic control method can effectively solve the problem of low utilization rate of power changing service.In order to test the low-carbon performance of the proposed strategy and method,a combined micro-grid system including wind power-carbon capture virtual power plant and charging/changing power station was established.The simulation results show that the low-carbon performance of the wind-carbon capture virtual power plant,the load optimization of the proposed pricing strategy and dynamic regulation method can effectively improve the low-carbon economy of the system.Finally,in order to explore the low-carbon complementary characteristics between the power-carbon capture virtual power plant at the source side and the charge-discharge strategy considering changing power station at the load side,the low-carbon economic scheduling model of the power-wind power and carbon capture virtual power plant considering charge-discharge strategy is constructed.The results of the example show that the charging and discharging strategy can optimize the system load on the premise of meeting the need of sustainable operation of the changing station.The proposed scheduling model not only realizes the absorption of the whole system wind power network,but also effectively improves the low-carbon performance and economic benefits of the system,providing a reference for the realization of green low-carbon transformation of the power system.