Development of a DC Fast Charging Station Model and Optimization of Station Design and Operation
This project, funded by National Renewable Energy Laboratory, develops an analysis through modeling of DC fast charging (DCFC) power consumption based on data provided by Electric Vehicle Infrastructure Projection Tool (EVI-Pro). DCFC increases customer convenience by lowering charging time, enables long-distance EV travel, and could allow the electrification of high-mileage fleets. There is a need to better understand DCFC stations’ loading, utilization, and customer service quality (i.e. queuing time, charging duration, and queue length). This project aims to analyze these aspects using one million vehicle-days of travel data within Columbus, OH region. Monte Carlo analysis is carried out in three types of areas - urban, suburban, and rural (as shown in the figure below)- to quantify the effect of uncertain parameters on DCFC station loading and service quality.
Furthermore, this study investigates a new method to design and operate a multi-port DCFC station with a power cap policy in order to mitigate high operation costs while providing sufficient service quality to the customers. Different policies which distribute available power capacity between multiple charging ports in a fair manner are simulated and compared. It is shown that operation costs can be reduced while the quality of service is preserved. The impact of the station design on the optimal power cap is simulated and analyzed. By adjusting the power cap with the increasing charging demand over the lifetime of the station, and by optimizing the station design, a total profit of up to $950k and unit costs as low as $0.2/kWh can be achieved.
- R. Buckreus, "Optimization of Multi-Port DC Fast Charging Stations and Operating with Power Cap Policy," M.S. thesis, Dept. of Electrical Computer Eng., The University of Alabama, Dec. 2020.
- R. Buckreus, R. Aksu, M. Kisacikoglu, M. Yavuz, B. Balasubramanian, "Optimization of multi-port DC fast charging stations operating with power cap policy," IEEE Trans. Transport. Electrific., under review.
- E. Y. Ucer, I. Koyuncu, M. Kisacikoglu, M. Yavuz, A. Meintz, C. Rames, ”Analysis for design and operation of a multi-port DC fast charging station,” IEEE Trans. Transport. Electrific., vol. 5, no. 1, pp. 215-225, March 2019
- R. Buckreus, M. Kisacikoglu, M. Yavuz, B. Balasubramanian, R. Aksu, "Analyzing quality of service and operation costs of a multi-port DC fast charging station," presented at IEEE Innovative Smart Grid Technol., 2021.
- E. Ucer, M. Kisacikoglu, F. Erden, A. Meintz, C. Rames. “Development of a DC Fast Charging Station Model for Use with EV Infrastructure Projection Tool,” IEEE Transport. Electrific. Conf. (ITEC), Long Beach, CA, June 2018.