Four-quadrant bidirectional operation of charging station upgraded with flywheel energy storage system

摘要

With penetration of plug-in electrical vehicles (PEV), fast charging stations (FCS) are expected to constitute be a considerable portion of total energy consumptions. This paper proposes a hybrid power coordinating control strategy implemented in a fast charging station equipped with flywheel energy storage system, in order to provide a comfortable charging circumstance for PEV as well as some ancillary services (active power and reactive power support) for grid by four-quadrate bidirectional operation. The distributed bus signaling (DBS) method is employed for coordinating the control between grid converter and flywheel converter to avoid the highly dependent on communication. Finally, the experimental results based on dSPACE1006 are presented to show the effectiveness of the proposed control structure.