Impacts Assessment of Ultra-Fast EVs Charging Stations Integrated with Distribution Energy System and Mitigations Measures Using Online Controller

Abstract

The concern about climate change and greenhouse gas emissions has resulted in a steady shift in the transportation sector from conventional fossil fuel-based combustion vehicles to electric vehicles. In the last decade only, the growth of electric vehicles (EVs) on the road has increased exponentially. The main drawback for widespread adoption, however, is range anxiety. Charging from an ultra-fast charging station (UFCS) solves this problem and makes EVs a worthwhile investment for manufacturers and customers. But UFCS comes with many technological constraints such as the requirement of high-capacity batteries, high-power charging converters and the grid impacts. In this paper, the negative grid impacts of UFCS, and power quality (PQ) problems of UFCS are summarized. The mitigation techniques are discussed and an online controller that works with open interfaces according to the international charging standards is proposed. A framework for optimized UFSC integrated with grid and distributed energy system is presented.