Reaserch On Effective Load Carrying Capacity Of Wind System For Electric Vehicles

With the continuous advance of national planning in 13th Five-Year,China's economy is developing rapidly,society is progressing and science and technology become more and more increasingly prosperous.In such a situation,the people's production and life style has also changed with each passing day,therefore,People's production activities and the demand for resources and energy are increasing.Furthermore our living environment and ecological environment are facing great pressure.At the same time,the global energy crisis and environmental problems have become increasingly prominent.It highlights the importance of China's sustainable development strategy.Wind power and other new energy sources began to be put into use and popularization,electric vehicles and other new means of transport into the tens of thousands of households.Compared with traditional energy sources,the randomness and intermittent increase of renewable energy output bring new challenges to the stability and reliability of distribution network,meanwhile,the load of the electric vehicle also makes the reliability of the network bear a greater burden.In conclusion,it is necessary not only to evaluate the reliability of traditional power grid connected with electric vehicles.Effective load carrying capacity of wind system for electric vehicles should be researched.Above all,in this paper,the load model of electric vehicle is established.In consideration of several factors affecting electric vehicle charging and statistical principles,the probability density curve of electric vehicle charging start time and the probability density curve of travel distance are fitted.According to the charging characteristics of EV battery,the electric vehicle charging power curve was calculated and draw by the Monte Carlo simulation method.We can understand the basic characteristics of charging load and the impact on the system.Taking IEEE-RTS79 test system as platform,the model of power system with wind farm and electric vehicle load was rebuilt.Monte Carlo simulation method based on sequential sampling principle,the reliability level of electric power system is analyzed.The influence of electric vehicle,wind power generation and two on the reliability of power system was observed.This paper defined the effective load carrying capacity of wind system for EV load in order to study the relationship between the wind power and EV load.In order to give full play to the role of wind power and ensure the reliability of power system,effective load carrying capacity of wind system for EVs should be strengthen.The introduction of V2G(vehicle-to-grid)Technology was introduced.The basic principles of V2G technology are summarized and expounded.On the basis of the V2G model,the possibility of controlling the charging behavior of electric vehicles is expounded.The load curve of electric vehicle considering wind power output is proposed and tested.The purpose is to make the electric vehicle charging power to ensure the actual needs of the case,and wind power,improve the utilization rate of wind power and coordinate development of electric vehicles and new energy generation.