The impact of electric vehicles to power grid whencharging is analyzed

the main research is about the influence to the balance of power grid load. Then

the electric vehicle chargingload is modeled

and time probability distribution of users’trip isanalyzed

The demand for electric vehicle charging load is calculated by Monte Carlo simulation method

in order to study throughout the time distribution of 3 000 electric vehicles’charging demand

The optimization model of regional power supply system including photovoltaic power generation system is established. Meanwhile

dynamic electricity price is used as incentive to guide electric vehi-cles to carry out orderly charging

so as to participate in power gridancillary services. With the minimum power fluctuation product and the lowest charging cost

the weighted function is taken as the objective function

combined with the four constraints

the geneticalgorithm is used to solve the model

and the optimal chargingscheme is obtained. Finally

an example is given to verify that the model can realize the function of shifting load

cutting peak and filling valley.