基于Buck变换器的模糊自抗扰Hopf分岔扰动抑制策略  

Fuzzy ADRC Hopf bifurcation disturbance suppression strategy based on a Buck converter

作　　者：张建功 周雪松[1] 马幼捷[1] 徐晓宁[1] 王鸿斌 赵家欣 ZHANG Jiangong;ZHOU Xuesong;MA Youjie;XU Xiaoning;WANG Hongbin;ZHAO Jiaxin(Tianjin Key Laboratory of New Energy Power Conversion,Transmission and Intelligent Control,Tianjin University of Technology,Tianjin 300384,China;Tianjin Anjie IoT Technology Co.,Ltd.,Tianjin 300392,China;Tianjin Ruiyuan Electric Co.,Ltd.,Tianjin 300308,China)

机构地区：[1]天津市新能源电力变换传输与智能控制重点实验室(天津理工大学),天津300384 [2]天津安捷物联科技股份有限公司,天津300392 [3]天津瑞源电气有限公司,天津300308

出　　处：《电力系统保护与控制》2023年第15期12-21,共10页Power System Protection and Control

基　　金：国家自然科学基金面上项目资助(51877152);天津自然科学基金项目资助(18JCZD97300)。

摘　　要：针对Buck变换器输出端口电压易受系统参数变化影响而降低能量传输质量的问题,提出了一种结合模糊推理机制的线性自抗扰控制策略。首先,建立离散数学模型分析出Hopf分岔扰动是引起输出电压低频振荡的原因,利用频域法分析其稳定的充要条件,给出Hopf分岔扰动存在性证明,并仿真验证了Hopf分岔扰动的存在。其次,基于理论分析设计模糊推理规则将其与误差反馈控制率结合来提升对Hopf分岔扰动抑制效果。并且,运用频域法理论分析了在Hopf分岔扰动下该控制策略的稳定性及各状态观测误差对干扰的界限。最后,通过仿真分析对比不同工况下此控制策略与传统PI控制策略对Hopf分岔扰动的抑制情况。结果表明,所提出的模糊线性自抗扰控制策略有效地抑制了Hopf分岔扰动,保障了Buck变换器的工作性能。Buck converter output port voltage is easily affected by system parameter change and thus reduces energy transmission quality.To deal with this,this paper puts forward a linear active disturbance rejection control strategy combined with a fuzzy reasoning mechanism.First,a discrete mathematical model is established to establish that the Hopf bifurcation disturbance is the cause of the low-frequency oscillation of the output voltage,and the necessary and sufficient conditions for its stability are analyzed by the frequency domain method.The existence of Hopf bifurcation disturbance is proved and verified by simulation.Second,based on theoretical analysis,fuzzy reasoning rules are designed,and then the rules are combined with error feedback control to improve the Hopf bifurcation disturbance rejection effect.The stability of the control strategy under the Hopf bifurcation disturbance and the limit of the observation error of each state to the disturbance are analyzed using the frequency domain method.Finally,through simulation analysis under different working conditions,Hopf bifurcation disturbance suppression is compared by using the control strategy and the traditional PI control strategy respectively.The results show that the proposed fuzzy linear ADRC strategy can effectively suppress the Hopf bifurcation disturbance and ensure the working performance of a Buck converter.

关 键 词：BUCK变换器 HOPF分岔 模糊推理 线性自抗扰控制器 稳定性 抗扰性 

分 类 号：TM46[电气工程—电器]