An energy management approach for electric vehicle fast charging station

Abstract

The Quebec government is boosting transportation electrification in their fight against climate change. An extensive network of fast charging stations is indispensable for the proliferation of electric vehicle (EV), as it provides a way to charge an EV in a short time. This paper focuses on operational planning and energy management in a fast charging station. First the statistical characteristics of charging demand and the forecast error of embedded station photovoltaic generation are modelled. An energy scheduling strategy of fast charging station is then developed based on the concept of flexibility envelope. In the proposed strategy, the parameters of flexibility requirements are adjusted according to the state of charge of station battery. The performance of the strategy is then evaluated in terms of the stations daily financial performance and customers' waiting time. Using these performance metrics, a set of case studies are conducted to verify the effectiveness of the proposed strategy.