低压配电网对电动汽车充电的承载能力

Supportability of Low Voltage Distribution Network for Electric Vehicles Charging

规模化电动汽车的接入将会对配电网的运行与规划产生不可忽视的影响,合理评估配电网对电动汽车充电负荷的承载能力有利于消除电动汽车充电负荷对于配电网的不利影响。基于最常见的辐射型配电网模型,采用数学解析的方法建立了低压配电网对电动汽车充电负荷承载能力的分析模型。全面揭示了低压配电网对电动汽车充电负荷承载能力的各影响因素及其变化规律。最后结合实际算例,为将来电动汽车接入配电网后的有序利用、充电设施的规划配置以及配电网改造提供基本建议,进而为规模化电动汽车应用的各种研究提供支撑。

The integration of large-scale electric vehicles(EV)will have significant impacts on the operation of the distribution network.Accurate evaluation of the supportability of EV charging load on distribution network is beneficial to eliminate the adverse impact of EV charging load on distribution network.In this paper,the analysis model of distribution network supportability for EV load is established by using the analytical method based on the most common radiation low voltage distribution network model.The influencing factors of distribution network supportability are comprehensively revealed.Finally,based on a practical example,some proposals are provided for the orderly use of EV integrated into grid as well as the configuration of the charging facilities and distribution network in the future.