Research On Optimal Operation Of Centralized Charging Station For Power Battery Based On Distributed Energy

In recent years,due to the problem of energy shortage and environmental pollution,distributed energy generation,such as wind and light,has been vigorously developed,and at the same time,electric cars have also started to spread.Due to the uncertain characteristics of distributed generation,"wind and light abandoning" situation exists in some regions.In addition,at the present stage,electric vehicle has problems such as long charging time and random charging burden on the power grid.Therefore,the combination of distributed energy generation and centralized charging stations of power batteries in the form of micro grid can promote the consumption of distributed energy and the adjustment of load curve of power grid.In the mode of power changing,this paper proposes a centralized charging station for power batteries based on wind,light and other distributed energies,and builds an optimization model,which is optimized by particle swarm optimization algorithm to maximize the utilization of distributed energies and load peak-to-trough cutting.of the abstract.Firstly,this paper describes the development prospects of distributed energy and electric vehicles,and puts forward the significance of optimal operation of centralized charging station for power batteries based on distributed energy under the mode of power exchange.Based on the analysis and comparison of the research status of distributed energy,electric vehicle switching mode and centralized charging station operation at home and abroad,the research direction of this paper is obtained,that is,to optimize the charging and discharging control strategy of power battery centralized charging station at different times.Secondly,the related technologies of wind,light and other distributed energy sources are analyzed in this paper.Through the analysis of control mode and operation mode of microgrid,it is concluded that distributed energy generation and centralized charging station of power battery can be combined by microgrid.The principle of wind power generation and the structure of permanent magnet direct drive wind power generation system are studied,and the simulation model is obtained by modeling.The equivalent mathematical model of photovoltaic power generation is analyzed,and Simulink is used to model and simulate photovoltaic power generation.Thirdly,the system structure model of centralized charging station of power battery is established,and the charging and discharging modes of electric vehicle are compared.The results show that the B2 G mode of electric vehicle has a promoting effect on the development of electric network and electric vehicle.The charging and discharging state of central charging station is modeled and analyzed,and the control strategy of battery energy storage converter system is studied.Finally,the optimization model of centralized charging station of power battery based on wind and light is built.The objective function is to suppress the peak-valley difference and load fluctuation of load and maximize the utilization of distributed energy such as wind and light.The constraints are system power balance,charging and discharging power in centralized charging station and battery power in the station.The particle swarm optimization algorithm is compared with other algorithms,and the algorithm is improved.Taking the daily load curve data of a certain area as an example,the optimization model is solved.The example shows that the optimized centralized charging station of power battery plays the role of peak shaving,Valley filling,load fluctuation restraining and maximum utilization of distributed energy.