基于时变权重模型预测的双向DC-DC优化控制方法
Bidirectional DC-DC optimal control method based on time-varying weight model prediction
马彬 1石永乐 2柴浩男 3姜文龙 4陈勇1
作者信息
- 1. 北京信息科技大学 机电学院,北京 100192;新能源汽车北京实验室,北京 100192;北京电动车辆协同创新中心,北京 100192
- 2. 北京信息科技大学 机电学院,北京 100192
- 3. 北京核力同创科技有限公司,北京 100192
- 4. 中国人民公安大学 治安与交通管理学院,北京 100038
- 折叠
摘要
双向DC-DC变换器是电动汽车的关键电压变换部件,提高其动态负载下的响应速度与鲁棒性对电动汽车低压供电系统有重要意义.提出一种基于模糊时变权重的MPC(model predictive control)控制方法.基于状态空间平均法建立变换器动态模型.基于MPC原理搭建变换器MPC模型,实现对电压的跟踪控制;在分析权重对动态负载下电压跟踪性能的影响的基础上,设计权重模糊调节器,实现权重的在线调节.基于HM-cSPACE搭建实验平台验证所提方法的准确性.在Matlab/Simulink环境下与PI控制和传统MPC控制进行对比,结果表明:在负载变化时采用时变权重MPC控制的变换器有更好的动态性能和鲁棒性,超调量降低26.1%.该方法对提高双向DC-DC变换器动态负载下的优化控制具有重要意义.
Abstract
The bidirectional DC-DC converter is a vital voltage conversion component in electric vehicles,and improving its response speed and robustness under dynamic load conditions holds is crucial for the low-voltage power supply system of electric vehicles.To overcome the challenge,this paper proposes a model predictive control(MPC)method based on fuzzy time-varying weights.First,a dynamic model of the converter is built by the state-space averaging method.Second,a converter(MPC)model is built based on the MPC principle to achieve voltage tracking.Based on our analysis of the impact of weight factors on voltage tracking performance under dynamic load conditions,a weight fuzzy regulator is designed to facilitate online weight adjustment.Finally,an experimental platform is developed by HM-cSPACE to validate the precision of the proposed method.Comparative assessments are made against traditional PI control and conventional MPC control within the Matlab/Simulink environment.Our results indicate the converter employing time-varying weight MPC exhibits superior dynamic performance and robustness when subjected to load variations,reducing the overshooting by 26.1%.The proposed method is of great significance in enhancing the optimal control of bidirectional DC-DC converters under dynamic load conditions.
关键词
双向DC-DC变换器/MPC控制/时变权重/模糊控制/动态负载Key words
bidirectional DC-DC converter/MPC control/time-varying weighting/fuzzy control/dynamic loads引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据