Research On The Impact And Countermeasure O F Large-scale Electric Vehicle Charging Demand On Power Grid

Nowadays,environmental pollution and energy shortage problem which closely related to the hearts of people are getting worse more and more. Energy conservation and development of new energy is imminent.Conventional cars which was called oil "tiger" as the key object, has been hit by new energy vehicles which are getting prosperous day by day, especially with the continuous development of electric vehicles of various technology mature, plus the vigorously support of national policy, the electric car industry has been renewed life.However, while addressing the issue of environmental pollution and energy shortage the scale of the charging demand will also have a profound impact on power grid as a new load of grid.This paper firstly describes the research status of the electric cars industry, and then mainly from the scale charging demand for grid load characteristic and the influence of the charger(station) harmonic pollution which are the two most intuitive impact, to study the principle that affect the process and the strategy of how to deal with them.The specific content are as follows:The electric car charging load model of different power supply modes is established by Monte Carlo simulation method after a detailed analysis of electric vehicle charging load factors.Through the simulation results of the model,we obtain the inpact for grid load characteristic by charging behavior of different power supply modes.Starting from the power demand side management and on the basis of price and demand relationship model, TOU pricing strategy is proposed to solve this unordered charging behavior. And its feasibility is confirmed by example;Proposed V2G(Vehicle to Grid) technology in the power system of electric vehicles and advanced nature of the interaction, and introduce to the wind turbine generator output regulation, to achieve the electric car output back to the Grid.About the harmonic pollution of charger(station),the author uses MATLAB/SIMULINK to establish a charger(station) model to simulate the harmonic of them at their working time and analyzes the results,then puts forward several specific charger(station) harmonic control measures on the basis of the research of harmonic characteristics.