How electric vehicle charging stations operate

Ev charging stations not only provide important energy guarantee for the large-scale promotion of ev, but also improve the flexibility of power system operation and scheduling. For power systems, smart charging stations can be viewed as a kind of charging load. Due to the strong randomness of electric vehicle operation, how to establish a probabilistic load model of electric vehicle charging station that can accurately reflect this randomness and be effective and practical is the focus of attention.

To establish a universal probabilistic load model of ev charging station, it is necessary to study the influencing factors in the modeling process in a comprehensive and detailed way and to select the importance of the influencing factors. The influence factors involved in the modeling of ev charging station are discussed comprehensively. These influencing factors involve the whole process of power system operation, control and management, including the energy supply mode, operation rule, battery characteristics, charging control mode, charging facility type and layout, etc.

Electric vehicle charging mode can be divided into battery replacement and direct charging. Direct charging mode can be divided into conventional charging and quick charging according to different charging power. The charging load of ev charging station is not only related to the charging mode of charging station. Moreover, influenced by the geographical location and travel characteristics of charging station users, ev charging stations are divided into three types of typical charging stations according to charging mode, geographical location and travel habits: battery replacement stations, charging stations in residential areas and charging stations in public places.