基于V2G技术的电动汽车充放电系统拓扑结构及控制策略研究  

Research on Topology and Control Strategy of Electric Vehicle Charging and Discharging System Based on V2G Technology

作　　者：周静雯 黄勇 来春庆 刘泽纬 曾晓龙 ZHOU Jingwen;HUANG Yong;LAI Chunqing;LIU Zewei;ZENG Xiaolong(College of Intelligent Systems Science and Engineering,Hubei Minzu University,Enshi 445000,China)

机构地区：[1]湖北民族大学智能科学与工程学院,湖北恩施445000

出　　处：《湖北民族大学学报（自然科学版）》2023年第2期232-239,共8页Journal of Hubei Minzu University:Natural Science Edition

基　　金：教育部产学合作协同育人项目(201802149044);教育部供需对接就业育人项目(20230110341)。

摘　　要：车辆到电网(vehicle to grid, V2G)技术可实现电动汽车与电网能量双向互动,可减轻对电力系统的潜在负荷影响并且对电网起到“削峰填谷”的作用,以此提高供电可靠性。目前,V2G系统网侧电流谐波的抑制效果并不显著,为了降低谐波畸变率,设计了一种基于脉宽调制(pulse-width modulation, PWM)型整流器和双向DC-DC变换器的拓扑结构,用以控制网侧与蓄电池的能量流动;提出了一种充电和放电时分别采用电压电流双闭环控制以及有限集模型预测电流控制(finite-control-set model predictive current control, FCS-MPCC)的策略,更好地抑制网侧电流谐波,降低谐波畸变率。在Matlab/Simulink中搭建了V2G系统模型进行仿真验证,仿真结果表明设计的V2G系统可实现网侧与蓄电池的互动,充电状态下网侧电流总谐波畸变率降为0.33%,放电状态下网侧电流总谐波畸变率降为0.48%,有效解决了电动汽车并网导致的电流谐波畸变。The vehicle to grid(V2G)technology can realize two-way interaction between electric vehicles and power grid energy,reduce the potential load impact on the power system and play a″peak load shifting″role in the power grid,thereby improving power supply reliability.At present,the suppression effect of current harmonics on the grid side of V2G system is not significant.In order to reduce the harmonic distortion rate,we designed a topology based on pulse-width modulation(PWM)rectifier and bidirectional DC-DC converter to control the energy flow between the grid side and the battery.A strategy of voltage and current double closed-loop control and finite-control-set model predictive current control(FCS-MPCC)is proposed to better suppress the grid-side current harmonics and reduce the harmonic distortion rate.The V2G system model is built in Matlab/Simulink for simulation verification.The simulation results show that the designed V2G system can realize the interaction between the grid side and the battery.The total harmonic distortion rate of the grid side current is reduced to 0.33%in the charging state,and the total harmonic distortion rate of the grid side current is reduced to 0.48%in the discharging state.This system effectively solves the problem of current harmonic distortion caused by the grid connection of electric vehicles.

关 键 词：V2G 电动汽车充电桩 PWM型整流器 FCS-MPCC 空间矢量控制 

分 类 号：TM46[电气工程—电器]