考虑电动汽车充电负荷空间分布的系统特性分析

电动汽车充电的便捷、安全是电动汽车产业化的必要保障。电动汽车充电负荷具有一定的随机性和集聚性,充电负荷接入电网的位置和容量不同,势必给电网带来不同的影响。如何适应电动汽车充电负荷的接入成为电网建设规划中面临的重点问题之一。基于现有的电动汽车充电方式的讨论,考虑电动汽车充电负荷随机分布和局部集中分布两种方式,通过仿真计算,详细研究了接入电网的电压和损耗特性,并对关键因素进行了分析。结果显示,接入电网的电压和损耗特性与充电负荷的分布密切相关。最后提出电动汽车充电站点设计和选址依据。

Influence of electric vehicle charging load distribution on power grid

Convenience and safety of electric vehicle is essential for electric vehicle industrialization. Since electric vehicle charging load is of random and aggregation, different charging position and power affect power system in different way. Integration of EV charging load will become one of the important problems for grid plan. Based on current charging modes, this paper investigates the voltage distribution and power loss of power system with random distribution and local concentration of charging load taken into account. The simulation indicates that the voltage and power loss are both closely related with the distribution of charging load. The EV charging station design and site selection principle are proposed.