Research On Layout Planning Of Automobile Charging Piles With Wind-solar Hybrid Power Generation System

With the national "green mountains and green water" development policy put forward.Clean energy has been vigorously promoted in social development,electric vehicle penetration rate is also growing rapidly with policy support.As a new type of large-scale electrical equipment,the impact of the massive influx of charging loads on the power grid of electric vehicles cannot be ignored.Therefore,research on new energy charging equipment is imperative.Research and planning of new charging facilities for electric vehicles is a hot issue to alleviate the impact of a large number of charging loads on distribution network.This paper firstly explores the travel and charging behavior of various types of electric vehicles,and predict the charging load of electric vehicles.Next,based on the prediction of electric vehicle charging load and the analysis of the impact of charging load on the distribution network,the impact on the distribution network after the application of hybrid vehicle charging piles with wind and solar is studied.The working principle and energy-saving operation mode of the new electric vehicle charging pile are simulated and analyzed in combination with the characteristics of wind-solar complementarity.Finally,according to the characteristics of this type of charging pile,the layout planning is carried out,and the planning effect is predicted and evaluated.First,the types of electric vehicles on the market and their different charging modes were analyzed separately.A charging load prediction model based on Monte Carlo method is proposed.Taking Yiwu City as an example,the impact on the power grid and the sensitivity of the power load when the typical load day is connected to the charging load in summer and winter is simulated and analyzed.The analysis shows that the power grid load is significantly affected by the charging load and has a high sensitivity.Then,based on the IEEE33 power-saving system model,a theoretical study on the charging load of electric vehicles is carried out using the forward-backward method.The Monte Carlo charging load forecasting model is used to analyze the influence of the electric vehicle charging load on the grid load,network loss,grid voltage and other aspects when the electric vehicle charging load is connected to the grid under different penetration rates in winter and summer.It is concluded that the higher the penetration rate,the more serious the impact.And the simulation prediction shows that the use of some wind-solar hybrid charging piles can significantly alleviate the peak load of the power grid,and at the same time reduce the impact of the peak charge on the power grid.The simulation prediction shows that the use of some wind-solar hybrid charging piles can significantly alleviate the peak load of the power grid,and at the same time reduce the impact of the peak charge on the power grid.Next,the system structure of the wind-solar hybrid charging pile is introduced,and its overall control strategy is simulated and analyzed.The composition and operation mode of this type of charging pile power supply system are analyzed.After mathematical modeling and simulation analysis of the whole system,Three operating control modes of wind-solar hybrid power generation system tracking its maximum power point in different environments are obtained when this new charging pile is used.The simulation results show that the overall system of the charging pile is correct and feasible,and the control strategy is feasible and effective.And based on the operation strategy and simulation verification,the influence of the charging pile operation mode with wind and solar hybrid power generation system on the actual layout planning is analyzed.Then,a mathematical model of charging station planning with minimum construction cost,charging cost and network loss is established.The immune genetic algorithm and the shortest path algorithm are used to solve the planning mathematical model,and the feasibility of the planning method is verified by example simulation.The results of site selection and capacity determination of charging stations in Yiwu City are obtained,and based on the preliminary analysis of the results,the deployment strategy of wind-solar hybrid charging piles is formulated.Finally,the demand for electric vehicle charging facilities is analyzed,and the demand for wind-solar hybrid charging facilities is predicted.Taking Yiwu City as an example,the common access schemes of charging facilities and wind-solar hybrid charging facilities are introduced.Based on the charging facility layout planning model based on the regional charging demand coefficient,the layout planning results of charging facilities are obtained.Combined with the city’s basic charging load distribution,the location of the wind-solar complementary charging piles is reasonably planned,and after the planning,an evaluation index is established and analyzed for the reduction of the power grid load amplitude and the regional substation load rate.It can be seen from the specific planning that wind-solar hybrid charging piles should generally be installed in areas with dense charging loads to maximize their benefits,and have a significant effect on optimizing the load rate of substations.