曾祥胜 陶丽芬 刘淑琼
摘 要:由国内外的研究现状可看,对充换电一体换电站配置的研究成果较少,且很少涉及到换电站动力电池及充电机的容量配置问题。如何尽可能降低换电站的投资、维护成本,提出更可靠的优化方案,是目前尚未解决的问题。因此文章将以现有的电动汽车换电站充电方式为根据,对电动汽车接入配网系统后的相关问题进行分析讨论,其结论对现代新能源汽车的接入对配网影响有一定参考意义。
关键词:电动汽车;配电网;充电池
中图分类号:TU852 文献标志码:A 文章编号:2095-2945(2018)23-0042-02
Abstract: From the research status at home and abroad, it can be seen that there are few research results on the configuration of rechargeable and commutated integrated power stations, and it rarely involves the capacity allocation of power batteries and chargers in the power stations. How to reduce the cost of investment and maintenance as much as possible and put forward a more reliable optimization scheme are unsolved problems at present. Therefore, based on the existing charging mode of electric vehicle for power station, this paper will analyze and discuss the related problems after the electric vehicle is connected to the distribution network system, and the conclusion has certain reference significance to the influence of modern new energy vehicle access on distribution network.
Keywords: electric vehicle; distribution network; rechargeable battery
引言
在現有充电模式下,电动汽车充电也存在着许多问题。比如,如果电动汽车的普及度更加广泛之时,例如出租车与公交车,由于其数量庞大,且不允许长时间等候,因此如何提高服务率,降低排队的时间便成为其中之一的问题。再者,也是最重要的,如果没有一个有序的充电次序,将会对电力系统造成巨大的伤害。例如在夏季或者每天的用电高峰时涌入大量的充电负荷,其中的无功设备会消耗大量的无功功率,进而可能会造成系统的无功功率急剧上升,从而使得用户电压降低,进而可能会使电网产生崩溃的危险。而如果进行有序的充电,不仅可以有效利用资源,在低电价时进行充电,减小运营成本,同时也可以起到削峰填谷的作用。
1 换电站类型及结构
电动汽车换电站主要由配电变压器、充电机、动力电池组及其更换装置等部分组成。……