摘要
在无序充电模式下,电动汽车大规模接入电网不仅会增加电网的用电负荷而且会产生大量谐波影响电网电能质量。为了研究电动汽车充电时谐波电流在时间上的分布规律,减少电动汽车在无序充电模式下对电网造成的谐波污染,该文在Simulink平台搭建住宅区充电站模型,根据无序充电模式下电动汽车的负荷分布情况和电动汽车车载机模型研究不同时刻下各次谐波电流的分布情况。仿真结果表明,当电动汽车充电负荷达到最大时其对单相电源产生的电流总谐波畸变率也最大;充电期间3次谐波的含量高于其它各次谐波,且随着充电负荷的增加3次谐波的含量也会随之缓慢增加;APFC技术能有效地抑制谐波电流,降低电动汽车充电时带来的谐波污染。
Under the disordered charging mode,the large-scale access of electric vehicles to the grid not only increase the power load but also generates a lot of harmonics that affect the power quality.In order to study the time distribution of harmonic current of electric vehicles in charge and reduce the harmonic pollution resulted by the disordered charging, this paper constructs a residential charging station model on the Simulink platform.Then,the harmonic current distribution of different times is studied in terms of the load distribution for electric vehicles under disordered charging mode and the on-board charger model of electric vehicles.Finally,a simulation is included for example.It is shown that the total harmonic distortion rate of current generated by the single-phase power supply is the largest when the charging load of electric vehicle reaches the maximum.The third harmonic content is obviously higher than other harmonics during the whole charging period.With the increasing of load,the third harmonic content will increase slowly.The APFC technology proposed in the paper can effectively restrain harmonic currents and reduce harmonic pollution caused by electric vehicle charging under disordered charging mode.
作者
徐佳夫
王旭红
李浩
李丹
XU Jia-fu;WANG Xu-hong;LI Hao;LI Dan(School of Electrical Information Engineering. Changsha University of Science and Technology, Changsha 410114, China;Zhaoqing Power Supply Bureau of Guangdong Power Grid Liability Co.Ltd., Zhaoqing 526060, China;State grid Puyang electric power supply company, Puyang 457000, China)
出处
《电力科学与技术学报》
CAS
北大核心
2019年第2期61-67,共7页
Journal of Electric Power Science And Technology
基金
国家自然科学基金(61473049)
关键词
电动汽车
无序充电
蒙特卡洛
车载充电机
谐波
electric vehicle
disorder charging
Monte Carlo simulation
on-board charger
harmonic
