| 引用本文: | 刘月贤,王天钰,杨亚宇,等.电动汽车充放电系统建模与仿真[J].电力系统保护与控制,2014,42(13):70-76. |
| LIU Yue-xian,WANG Tian-yu,YANG Ya-yu,et al.Modeling and simulation of electric vehicles’ charge and discharge system[J].Power System Protection and Control,2014,42(13):70-76 |
|
| 摘要: |
| 并网电动汽车既是随机的负荷又是移动的储能元件，其充放电行为对电网的运行有较大影响，而充放电系统的建模是研究电动汽车并网的基础。建立了由电压型PWM整流器和双向DC/DC变换器构成的电动汽车充放电模型；针对电动汽车充电，提出了一种新的控制策略，在恒流阶段采用电流单环控制，达到设定电压值后系统自动切换为电压电流双闭环控制，实现恒流恒压充电。最后，在Matlab/Simulink中仿真实现了电动汽车充放电控制策略，并与单纯采用双闭环控制的恒流恒压充电策略进行了比较。仿真结果验证了充放电控制策略的正确性，并证明了所提出的自动切换的充电控制策略的优越性。 |
| 关键词: 电动汽车 PWM整流器 buck-boost变换器 充放电控制策略 恒流恒压充电控制 恒流放电控制 |
| DOI： |
| 分类号: |
| 基金项目: |
|
| Modeling and simulation of electric vehicles’ charge and discharge system |
|
LIU Yue-xian1, WANG Tian-yu1, YANG Ya-yu1,2, WANG Xiao-ru1
|
|
1.School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China;2.School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
|
| Abstract: |
| Grid-connected electric vehicles are not only the random loads but also the mobile storage components and their charge and discharge behaviors have big effects on the grid operation. Moreover, modeling of electric vehicles is the foundation for studying grid integration. Electric vehicles’ charge and discharge model which consists of a voltage-source rectifier PWM and bi-directional DC-DC converter is established. A novel charge control strategy for electric vechicles is introduced which uses current loop control in the current constant stage and switches automatically to voltage and current double closed loop controls when the system reaches to the set voltage values to achieve constant current and constant voltage charge. Finally, the control strategy is simulated by using MATALB/SIMULINK and compared with the charge strategy by adopting voltage and current closed loop controls merely, which demonstrates the effectiveness of charge and discharge strategy and proves the superiority of the proposed automatic-switchover charge control strategy. |
| Key words: electric vehicles PWM rectifier buck-boost converter charge and discharge strategy charge control of constant current and constant voltage discharge control of constant current |
