PDF(Pubmed)
Abstract：
The demand for renewable energy-based Electric Vehicle (EV) charging infrastructure is increasing in recent years. Solar PV based EV charging method is preferred as it has simple energy harvesting technique. The PV system is an uncertain power source, where the power generation is varied with respect to the availability of sunlight. So, that the charging station requires a backup power supply for the uninterrupted charging. For the integrated power sources, the charging station requires a simple and efficient conversion unit for the DC/AC/DC conversion. In this work, a modified Z-source inverter (MZSI) is developed for the multiport EV charger using PV and grid. The proposed MZSI is connected between the input and output sides to boost the voltage as per the demand at the battery side. In order to connect many battery units with the charger, the capacitors used in the MZSI are split as per the required number of charging ports. This developed converter topology operates the systems in four different modes like PV-Grid, PV-battery, grid-battery, and battery-grid. The performance of this proposed work has been validated in MATLAB/Simulink® and in the experimental setup. The experimental setup has been developed with two charging ports for obtaining 250W at each charger end which cumulatively produces 500W output across both chargers with an efficiency of 90.18%.
摘要：
近年来，对基于可再生能源的电动汽车（EV）充电基础设施的需求正在增加。基于太阳能光伏的EV充电方法是优选的，因为它具有简单的能量收集技术。光伏系统是一个不确定的电源，其中发电量根据阳光的可用性而变化。所以,充电站需要备用电源进行不间断充电。对于综合电源，例如,充电站需要用于DC/AC/DC转换的简单且高效的转换单元。在这项工作中,为使用光伏和电网的多端口EV充电器开发了一种改进的Z源逆变器（MZSI）。所提出的MZSI连接在输入侧和输出侧之间,以根据电池侧的需求升高电压。为了将许多电池单元与充电器连接，MZSI中使用的电容器根据所需的充电端口数量进行拆分。这种开发的转换器拓扑以四种不同的模式操作系统，如光伏电网，PV电池，电网电池，和电池网格。这项工作的性能已在MATLAB/Simulink®和实验装置中得到验证。已经开发了具有两个充电端口的实验装置,用于在每个充电器端获得250W,其在两个充电器上以90.18%的效率累积地产生500W的输出。
