Operation and V2G Realization of EV Charging Station Micro-grid with PV/Storage Power
The study on micro-grid operation mode of EV charging station with PV/storage power is of great significance to the realization of grid stable operation and low carbon economy.In this paper,a micro-grid structure of EV charging station with PV/storage power is proposed,and its structure and function realization are introduced.Within the micro-grid,a limited current closed-loop control strategy is used to control the bi-directional DC/DC converter.Then bi-directional AC/DC converter is controlled referring to micro-grid control strategies:the voltage outside and inductance current inside double closed-loop is used for grid-connected rectifier and PQ inverter control modes; the voltage outside and capacitive current inside double closed-loop for the off-grid V/f and Droop inverter control modes.Accordingly simulation platform was built on Simulink,and the results show that the system can realize the V2G technology fast and stably in the grid-connected mode,and can also operate stably and supply power reliably in the island mode.It has practical reference value to the designing and engineering implementation of new style electric vehicle charging station.
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