Suzhou Electric Appliance Research Institute
期刊號: CN32-1800/TM| ISSN1007-3175

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改進(jìn)無源延時反饋控制下Buck變換器分岔抑制研究

來源:電工電氣發(fā)布時間:2022-10-25 13:25 瀏覽次數(shù):406

改進(jìn)無源延時反饋控制下Buck變換器分岔抑制研究

馬闖,高志強(qiáng),郭帥朝,張超
(天津理工大學(xué) 電氣工程與自動化學(xué)院,天津 300384)
 
    摘 要:針對斷續(xù)導(dǎo)通模式下的 Buck 變換器因負(fù)載參數(shù)敏感而引發(fā)的無預(yù)測性分岔現(xiàn)象,設(shè)計了一種以無源延時反饋控制為核心的改進(jìn)無源控制方法。建立了 Buck 變換器在脈寬調(diào)制策略下的離散迭代映射數(shù)學(xué)模型,分析了非線性分岔行為的產(chǎn)生機(jī)理;以抑制強(qiáng)隨機(jī)性分岔現(xiàn)象為目標(biāo),引入無源延時反饋控制策略,并替代傳統(tǒng)比例積分矢量控制;為優(yōu)化系統(tǒng)動態(tài)響應(yīng),提升系統(tǒng)波形質(zhì)量,引入指數(shù)優(yōu)化通道,形成改進(jìn)無源反饋控制。通過 MATLAB/Simulink 仿真平臺,搭建了 Buck 降壓變換器物理拓?fù)浞抡婺P?,驗證分岔抑制情況,并設(shè)計不同工況進(jìn)行多條件下的系統(tǒng)特性驗證。仿真結(jié)果表明:改進(jìn)無源反饋控制下的變換器系統(tǒng)既具備抑制分岔行為的抗擾能力,又可使系統(tǒng)輸出波形質(zhì)量佳的優(yōu)質(zhì)電能。
    關(guān)鍵詞: Buck 變換器;斷續(xù)導(dǎo)通模式;分岔現(xiàn)象;改進(jìn)無源反饋控制
    中圖分類號:TM46 ;TN624     文獻(xiàn)標(biāo)識碼:A     文章編號:1007-3175(2022)10-0001-09
 
Research on the Situation of Bifurcation Suppression of Buck Converters
Under the Improved Passive Delay Feedback Control Method
 
MA Chuang, GAO Zhi-qiang, GUO Shuai-chao, ZHANG Chao
(College of Electrical Engineering and Automation, Tianjin University of Technology, Tianjin 300384, China)
 
    Abstract: This research proposed an improved passive control method based on passive delay feedback control to solve the unpredictability bifurcation phenomenon of Buck converter in intermittent conduction mode due to the sensitivity of load parameters. It constructed the discrete iterative mapping mathematical model of Buck converter under pulse width modulation strategy to analyze the generation mechanism of nonlinear bifurcation behavior. In addition, this paper introduced a passive delay feedback control strategy to replace the traditional proportional integral vector control for suppressing the strong stochastic bifurcation. Besides, it introduced an exponential optimization channel to form an improved passive feedback control for optimizing the dynamic response and improving the waveform quality of the system. Furthermore, this study built the physical topology simulation model of the Buck converter based on the MATLAB/Simulink simulation platform to verify the bifurcation suppression. It also designed different working conditions to check the system characteristics under multiple situations.The simulation result shows that the converter system under the improved passive feedback control not only has the anti-interference ability to suppress the bifurcation behavior, but also could make the system output high-quality electric energy with good waveform quality.
    Key words: Buck converter; intermittent conduction mode; bifurcation phenomenon; improve passive delay feedback control
 
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