Virtual Synchronous Motor Based-Control of a Three-Phase Electric Vehicle Off-Board Charger for Providing Fast-Charging Service

Applied Sciences

Zhipeng Lv¹  Hui Zeng²  Zhonghao Jia³  Xiangwu Yan³  Yang Tian³  Jiajia Li³  Bo Zhang³ 

[1] China Electric Power Research Institute (CEPRI), Beijing 100192, China;Electric Power Research Institute of State Grid Liaoning Electric Power Co. Ltd., Shenyang 110006, China;Key Laboratory of Distributed Energy Storage and Micro-Grid of Hebei Province, North China Electric Power University, Baoding 071003, China;

关键词: electric vehicle;    virtual synchronous motor;    frequency and voltage regulation;    off-board charger;    fast charging;    equivalent synchronous grid;   

DOI  :  10.3390/app8060856

来源: DOAJ

【 摘 要 】

This study introduces a three-phase virtual synchronous motor (VSM) control and its possible application for providing fast-charging service from off-board chargers of electric vehicles (EVs). The main circuit of the off-board charger consists of a three-phase voltage source PWM rectifier (VSR) and a resonant LLC zero-voltage-switching converter. In the proposed control approach, VSM-controlled pre-stage VSR emulates the external characteristics of a synchronous motor (SM), simultaneously, droop control based on charging mode in the VSM can satisfy the demand of the EVs constant-current fast-charging; The post-stage DC–DC converter is responsible for stabilizing the DC bus voltage. The feature of this control strategy is that VSM and fast charging control are implemented by the pre-stage converter, which has better coordination. In the MATLAB, the equivalent synchronous grid of the distribution network supplies to the power battery through the off-board charger, and the effectiveness of the presented control is demonstrated by typical working conditions.

【 授权许可】

Unknown