Research On Microgrid Optimization Scheduling Of Electric Vehicle Charging And Replacing Station

At present,mankind is under the dual pressures of environmental pollution and energy shortage,and it is inseparable from realizing the sustainable development of society and energy supply.Distributed renewable energy generation is gaining more and more attention because it can directly supply energy near the user side and facilitates the complementation of various energy forms.Microgrids can effectively integrate distributed power,regulate and control the fluctuations of distributed power on the power grid,and can significantly improve the flexibility and safety of the power system.All this is inseparable from the research on the micro-grid energy optimization management system,which is of great significance to the reliability and operational economy of the micro-grid power supply.In this paper,the issue of energy management in micro-grid is studied,and the optimal scheduling model of micro-grid is established.The main contents of this paper are as follows:Firstly,aiming at the micro-grid system with wind and solar energy,this paper establishes a multi-time scale optimal scheduling strategy that combines the short-term and the short-term.Recently,the optimal operation has the lowest operating cost and the highest load satisfaction as the objective function.Short-Plan to minimize and prioritize the use of renewable energy as the objective function.The constraints of distributed power system and micro-grid distributed power system are constructed.In addition,considering the efficiency characteristics of diesel engine,the operating efficiency of diesel engine can be reduced and its operating cost can be reduced.And taking advantage of the general load translatability,it not only reduces the economic compensation due to the interruption load,but also increases the utilization of renewable energy.The mixed integer linear optimization method of MATLAB is used to solve the scheduling model,and the output of each distributed power source and energy storage is obtained.Secondly,for the micro-grid system with electric vehicle,this paper analyzes the influence of electric vehicle charging on the load,operation and planning of microgrid.This paper builds the load model of electric vehicle from the aspects of charging characteristics,charging capacity and charging time of the power battery,The use of Monte Carlo simulation of electric vehicle charging behavior;the use of electric vehicle charging behavior of the statistical data to a residential microgrid power supply as an example,the disordered charging of electric vehicles simulation,the simulation results show that chaotic charging will result The peak of the grid peaks,aggravating the load curve fluctuations,reducing the economic power grid.