Increasing electric vehicle hosting capacity and equality for fast charging stations using residential photovoltaics in medium‐ and low‐voltage distribution networks
Increasing electric vehicle hosting capacity and equality for fast charging stations using residential photovoltaics in medium‐ and low‐voltage distribution networks
复制标题
提高中低压配电网中使用户用光伏发电的电动汽车承载能力和快速充电站的平等性
DOI：
10.1002/tee.23064
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发表时间：
2019
影响因子：
1
通讯作者：
T. Funaki
中科院分区：
文献类型：
--
作者：
H. Sugihara;T. Funaki
为了实现电动汽车（EV）的广泛安装，重要的是在许多点部署快速EV充电站，而无需配电网加固。本研究开发了一种方法，用于评估在具有总线电压和线路电流约束的中低压（MV和LV）配电网下快速EV充电负载的承载能力;因此，分析了配电网中快速EV充电和屋顶光伏（PV）发电的有前途的组合。特别是在阳光明媚的日子里，屋顶光伏提供的有功功率输出可用于缓解终端住宅客户的电压降问题。在阴天，即使有功功率输出较小，屋顶PV的剩余逆变器容量也可用于从这些系统产生无功功率。此外，为了评估在快速充电站的EV承载能力的空间均衡，提出了一个均衡因子的空间分布，这是作为一个百分比的EV承载能力在同样最大化的情况下，在简单的最大化的情况下。使用住宅屋顶PV的有功和无功功率输出，可以将均衡因子从大约33%提高到70%。2019年日本电气工程师协会出版社：John Wiley & Sons，Inc.
To achieve broad installation of electric vehicles (EVs), it is important to deploy fast EV charging stations at many points without distribution network reinforcement. This study develops a methodology for evaluating the hosting capacity for fast EV charging loads under medium‐ and low‐voltage (MV and LV) distribution networks with bus‐voltage and line‐current constraints; hence, the promising combination of fast EV charging and rooftop photovoltaic (PV) generation in distribution networks is analyzed. In particular, on a sunny day, the active power output supplied by rooftop PVs can be used to mitigate the voltage drop problem for end‐use residential customers. On a cloudy day, even though the active power output is smaller, the residual inverter capacities of rooftop PVs can be used to generate reactive power from those systems. In addition, in order to evaluate the spatial equalization of the EV hosting capacity at fast charging stations, an equalization factor of the spatial distribution is proposed, which is obtained as a percentage of the EV hosting capacity in the equally maximized case over that in the simply maximized case. The equalization factor can be improved from approximately 33 to 70% using the active and reactive power outputs from residential rooftop PVs. © 2019 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.