提出网格选取法，在保证变压器不过载运行的同时，灵活规划电动汽车的充电时段。进而基于峰谷分时电价构建了充电电费支出最小的目标函数，并基于遗传算法设计了求取最优网格选取结果的方法与步骤(A grid selection method is proposed to flexibly plan the charging time of electric vehicles while ensuring that the transformers are not in operation. Then, based on the peak and valley TOU price, the objective function of the minimum charge and electricity cost is constructed, and the method and steps to obtain the optimal grid selection result are designed based on the genetic algorithm)