Low-carbon Economic Dispatch Of Power System With Wind Power Considering Electric Vehicle Cluster And Carbon Capture Power Plant

Low-carbon electricity is the prospect of future electric power system,improving the utilization rate of renewable energy and low-carbon transformation of thermal power units are an important means to promote carbon peaking and achieve the goal of carbon neutrality.Wind power has the characteristics of randomness and anti-peak regulation.Large-scale wind power integration will aggravate the peak regulation pressure and valley-to-peak difference.Therefore,it is required to abandon the wind to ensure the stable operation of the power system.At present,energy power generation is mainly based on thermal power generation,and the dominant position of thermal power generation will not be replaced in the short term,but thermal power generation will generate a large amount of carbon dioxide,which is not conducive to the realization of low-carbon power.To resolve above two problems,this thesis considers the coordinated operation of large-scale electric vehicles and wind power to improve the phenomenon of wind power curtailment,and introduces carbon capture technology to reduce the carbon emission of thermal power plants.This thesis propose a low carbon economic dispatch of electric vehicle cluster and carbon capture power plant and research around this model,the main work is as follows:（1）Predict the charging load of electric vehicles.The factors that affect the charging load of electric vehicles include electric vehicle charging mode,electric vehicle battery characteristics and electric vehicle driving characteristics.The charging mode and battery parameters of electric vehicles are determined through data collection and analysis.According to the travel data of private cars in Beijing on weekdays and weekends,the trip characteristics of electric vehicles are analyzed and the probability density function is fitted.According to the probability density function and mainstream electric vehicle parameters,the Latin hypercube sampling is used to simulate and calculate the off-grid time,on-grid time and daily mileage data of electric vehicles.（2）Cluster processing of large-scale electric vehicles.According to the charging time margin,large-scale electric vehicles are divided into conventional clusters that can be charged immediately after grid connection and schedulable cluster of grid dispatching.The schedulable cluster is further divided to the off-grid and on-grid time cluster according to the off-grid time and the grid connection time of electric vehicles.Considering the charging time,charging energy demand,upper and lower limits of charging power and charging and discharging process constraints of electric vehicle cluster,the model of electric vehicle cluster is established.The fuzzy theory is introduced considering the uncertainty of wind power and electric vehicles.The fuzzy parameters are used to describe the predicted values of wind power and electric vehicles,and the fuzzy chance constrained economic dispatch model with electric vehicle clusters and wind power is established.Through the example analysis,it is concluded that the coordinated operation of electric vehicles and wind power can effectively realize peak shaving and valley filling,improve wind power consumption capacity.（3）The basic structure of carbon capture system is analyzed,the working principle and energy consumption source of carbon capture power plant are studied,and the relationship between energy flow and carbon dioxide is clarified.On this basis,combining carbon capture power plants and electric vehicle clusters,and taking the lowest comprehensive operating cost of the system as the objective function,a low-carbon economic dispatch model of power system with wind power considering comprehensive flexible operation mode of carbon capture power plant and electric vehicle cluster is constructed.The results show that the coordinated operation of electric vehicle cluster and carbon capture power plant can play a role in peak shaving and valley filling,effectively improve wind power curtailment,reduce system carbon emissions and comprehensive operation cost,and realize low-carbon power and economic development.