A new compensation method to improve the dynamic characteristics of DC-link voltage in multi-function rapid charger for electric vehicle

摘要

A multi-function rapid charger (MFRC) performs the operation either active power filter (APF) mode or battery charging mode. The MFRC operates on APF mode for improving the power quality of the grid. When electric vehicle (EV) comes to charging station, the MFRC is operated on battery charging mode and it causes DC-link voltage to fluctuate because the electric energy is transferred abruptly from DC-link to the batteries on EVs. In this paper, a new compensation control method is proposed to improve the dynamic characteristics of MFRC. Simulations have been carried out to verify the effectiveness of the proposed scheme.