摘要
为了定性定量分析电动汽车大规模、高密度接入引起的电网谐波问题,提出了一种电动汽车快充充电站谐波分析模型。在综合考虑充电模式、电池特性、用户驾驶行为习惯的基础上,建立了快充充电站功率时序概率密度函数;然后,结合考虑充电机拓扑结构的谐波解析表达式,建立了计及时序特性的电动汽车充电站快充谐波分析模型;最后,以湖北某地区电动汽车充电站相关数据为依据,研究了电动汽车充电站各次谐波及总谐波畸变的时序变化规律。结果表明,电动汽车充电机拓扑结构及数量对充电站谐波特性影响显著,谐波总畸变率(total harmonic distortion rate,THD)呈现明显的时序特性。在规划接入阶段应有意识的选取合适的时段分析,并合理搭配电动汽车充电站内的充电机种类以降低谐波影响。
Focusing on the qualitative and quantitative analyses of harmonic issue caused by high integration of electrical vehicles,we proposed a quick-charging harmonic analysis model on account of time series pattern of electrical vehicles station.Taking the charging mode,car type,battery characteristics and driving habits into account,we put forward the charge-discharge probability density function of an electrical vehicle charging station on account of sequence behavior.Subsequently,combining the main topology of electric vehicles charger,we utilized an analytic expression of the electrical vehicles along with the time-series behaviors of load to establish the harmonic analysis model of electrical vehicle station.Finally,we studied the influences of electric vehicles charger on the power harmonic.The results show that the topology and number of electric vehicles charger have significant influences on harmonic current,and the total harmonic distortion rate(THD)is consistent with the sequence behavior of load.The typical period and the combination of electric vehicles chargers should be considered at the planning stage to analyze and reduce the harmonic impact of electrical vehicles station.
作者
胡畔
吴斌
陈红坤
康逸群
钱一民
HU Pan;WU Bin;CHEN Hongkun;KANG Yiqun;QIAN Yimin(Electric Power Research Institute,State Grid Hubei Electric Power Company,Wuhan 430077,China;Hubei Institute of Measurement and Testing Technology,Wuhan 430223,China;School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2019年第11期3645-3655,共11页
High Voltage Engineering
基金
国家电网公司总部科技项目(521532180009)
国家自然科学基金(51877154)~~
关键词
电动汽车充电站
拓扑结构
用户习惯
谐波分析
时序模型
快充
electrical vehicle charging station
topological structure
customer habbit
harmonic analysis
sequence model
fast-charging
