eng Science and Education Publishing Journal of Automation and Control 2372-3041 2017-07-04 5 1 16 19 10.12691/automation-5-1-3 AUTOMATION2017513 article Lu Mengtian lmt666@icloud.com 1 School of Electrical Engineering and Automation, Nanjing Normal University With the influence of electric vehicle technology development and environmental factors, more and more electric cars come into our life, we can expect large electric vehicles will connect to the grid in the future so it is necessary to study the influence of electric vehicle charging on distribution network system. This paper chooses New England 10 machine 39 bus system as an example to study the effect of electric vehicle charging on power grid loss in different permeability. The paper choose charging time and charging demand as constraint conditions, minimizing circuit loss rate as the objective function. The paper select the artificial fish swarm algorithm to optimize the simulation, through the Newton Raphson to calculate the power flow in MATLAB to get the contrasting curves of line loss rate before and after optimization, verify the effectiveness of the optimization model proposed in this paper. http://pubs.sciepub.com/automation/5/1/3/automation-5-1-3.pdf electric vehicle power flow calculation artificial fish swarm algorithm line loss rate