The unstable output of such distributed generation（DG）of renewable energy as vehicle to grid（V2G）of electric vehicle（EV）and wind as well as solar energy brings uncertainty of the network. First

the strategy of charging and discharging V2G with the peak-load shifting and the user charging cost as objective is proposed on the basis of considering the randomness of EV driving characteristic and probabilistic model of EV charge and discharge power is set up. Then

a multi-objective GD optimal allocation model with the total cost of distribution network

environmental benefits and the power supply quality as the objective function is set up on the basis of considering the randomness and relevance of wind velocity

illumination intensity

load and EV charging and discharging power. After that

the globally optimal allocation planning is solved by using firefly algorithm（FA）. Finally

the simulation is performed by the use of actual calculation example and the feasibility of the proposed model is proved through analysis of the simulation result.