Evaluating EV Charging Stations Operation with Medium Voltage Solid-State Transformer: Grid Performance and Value Analysis

With the rapid increase in Electric Vehicle (EV) fast charging technology and the growing adoption of EVs, there is a pressing need to accommodate the rising demand for charging infrastructure. The EV fast charging stations bring opportunities as well as challenges to the power grid. EV charging stations integrated to the existing distribution grid are likely to encounter grid issues such as voltage fluctuations, under-voltage, congestion, and increased losses. To mitigate such issues and ensure reliable grid operation, robust solutions need to be employed by the charging stations. Medium Voltage Solid-State Transformers (MV SSTs) with their capabilities to manage and enhance the grid operation emerge as a promising technology. This paper delves into the application of MV SSTs in EV charging stations and assesses their impact on the overall feeder performance, comparing it with the traditional transformer scenario. The results show improved voltage regulation and long-term value benefits of MV SST. grid operation emerge as a promising technology. This paper delves into the application of MV SSTs in EV charging stations and assesses their impact on the overall feeder performance, comparing it with the traditional transformer scenario. The results show improved voltage regulation and long-term value benefits of MV SST.