Abstract
This work presents a novel grid incorporating distributed energy resources (DER) for electric vehicle (EV) charging infrastructure with a fractional order PI controller. A combination of photovoltaic (PV)-solar, fuel cell and battery energy sources are utilized to form a DERs. The integration of DERs not only decreases the impact of environmental issues and enhances power quality and reliability of the grid. The developed grid tied DERs facilitates bidirectional power flow capability, seamless smooth EV charging and significant impact for grid support during peak load demand or grid off conditions. Besides, the proposed common DC bus architecture enables high-power, medium or fast charging at multiple voltage levels, significantly slowing down the EV charging time span. To incorporate DER into EV charger to obtain fast charging application static transfer switches (STS) are employed. The STS switches provide redundancy when power sources affect with intermittent nature for reliable power operation of the load it can provide power from other available power sources. Furthermore, optimize the operation of the DER-based EV fast charging system these STS switches are controlled by an advanced fractional-order PI (FOPI) controller. To analyze the controller performance of proposed work the simulation case study carried out on DER based EV system in both grid integration and grid off conditions. In both the conditions the proposed FOPI control approach provides satisfactory simulation responses.