摘要
汽车充电桩应用电路中通常会使用双向DC-DC变换器,该双向变换器存在因负载扰动而导致系统动态响应慢、输出电压稳定性差等问题。因此,以电容-电感-电感-电容CLLC(capacitor-inductor-inductor-capacitor)谐振DC-DC变换器为研究对象,提出1种基于滑模自抗扰的CLLC谐振变换器控制方法。采用基于模型辅助的线性状态观测器提高扰动的估计精度,控制系统稳定运行。采用滑模控制设计线性状态误差反馈控制律,提升系统的动态性能和快速性。仿真及实验验证表明,所提控制策略能有效改善双向DC-DC变换器的动态响应能力,增强输出电压稳定性。
Bi-directional DC-DC convertersare usually used in vehicle charging pile application circuits,which have problems such as slow system dynamic response and poor output voltage stability due to load perturbations.On the basis,acapacitor-inductor-inductor-capacitor(CLLC)resonant DC-DC converter is taken as a research object,and a control method for the CLLC resonant converter based on sliding mode active disturbance rejectionis proposed.A model-assisted linear state observer is used to improve the estimation accuracy of perturbation,so as to control the stable operation of the system.Sliding mode control is used to design a linear state error feedback control law to improve the dynamic performance and rapidity of the system.Simulations and experimental verification show that the proposed control strategy can effectively improve the dynamic response of the bi-directional DC-DC converter and enhance the output voltage stability.
作者
祝龙记
杨静
ZHU Longji;YANG Jing(School of Electrical and Information Engineering,Anhui University of Science and Technology,Huainan 232001,China)
出处
《电源学报》
北大核心
2025年第8期1-11,共11页
Journal of Power Supply
基金
国家自然科学基金资助项目(U1610120)
安徽理工大学研究生创新基金资助项目(2023CX2088)。
关键词
谐振变换器
自抗扰控制
滑模控制
动态响应
Resonant converter
active disturbance rejection control
sliding mode control
dynamic response
