中文摘要：

合理的峰谷时段划分是通过分时电价实现电动汽车有序充电的基础。为了研究不同时段划分下，电动汽车充电负荷分布改变后对负荷曲线的影响，根据驾驶习惯的统计数据构建了充电负荷对分时电价的响应模型。按照不同的时段划分设立了多个场景，运用蒙特卡洛模拟的方法从谷时段开始时刻负荷大小，系统最大负荷及出现时间，系统峰谷差等4方面得到了不同时段划分对配电系统负荷曲线的影响。算例结果表明，谷时段开始时刻越晚，充电负荷对负荷曲线的影响越小。

英文摘要：

Reasonable peak and valley period partition serves as the basis of electric vehicles coordinated charging by time of use （ TOU） .To analyze the impact of electric vehicles charging load on load curve under differ -ent period partition , the charging load response model to TOU based on the statistics of the driving habits is built . Some scenarios are set according to different period partitions and the load of start time of valley period , numerical value and moment of peak load and peak-valley differences with the Monte Carlo simulation method are analyzed under those scenarios .The simulation results show that the closer start time of valley period to midnight , the less impact it has on load curve of distribution system .