Abstract: With the increasing power demand of electric vehicles,large-scale electric vehicles charging may cause the operation of the distribution network to exceed the limit.At the same time,it may also cause problems such as system peak load growth,which may put pressure on the system transmission and power generation capabilities.In view of the above problems,combining the characteristics of distributed energy,the advantages and disadvantages of different micro-network systems was analyzed,the principles and methods of project allocation were given,and the project revenue was analyzed.This paper realizes the use of light-raised piles,the peak shaving and valley filling,smoothing the fluctuation of charging load,reducing the grid capacity pressure,improving the reliability of power supply,which has a good prospect of promotion.

Key words: electric vehicles, distributed energy, micro-network system, peak shaving and valley filling