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崔森,陈敏,居鑫,况智允.超高频Z源DC/DC变换器的呼吸现象分析[J].电源学报,2019,17(2):72-78
超高频Z源DC/DC变换器的呼吸现象分析
Analysis of Intermittent Phenomenon of High-frequency Z Source DC/DC Converter
投稿时间:2017-03-22  修订日期:2018-10-22
DOI:10.13234/j.issn.2095-2805.2019.2.72
中文关键词:  超高频Z源变换器  耦合干扰  呼吸现象  时间分岔
英文关键词:high-frequency Z source converter  coupling interference  intermittent phenomenon  time bifurcation
基金项目:重庆理工大学研究生创新基金重点资助项目(YCX2016104)
作者单位E-mail
崔森 重庆理工大学电气与电子工程学院, 重庆 400054
重庆市能源互联网工程技术研究中心, 重庆 400054 
15025393060@163.com 
陈敏 重庆理工大学电气与电子工程学院, 重庆 400054
重庆市能源互联网工程技术研究中心, 重庆 400054 
 
居鑫 重庆理工大学电气与电子工程学院, 重庆 400054
重庆市能源互联网工程技术研究中心, 重庆 400054 
 
况智允 重庆理工大学机械工程学院, 重庆 400054  
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中文摘要:
      Z源变换器因在超高频条件下具有体积小、效率高等特点而备受关注,但该变换器在光伏并网等实际工作过程中更易产生一种规则的噪声,即耦合电路引起的传导和电磁辐射的干扰使得变换器产生呼吸现象,严重影响电网系统稳定。故建立了具有耦合干扰信号的超高频Z源变换器模型,通过电路仿真及实验观察到了间歇现象,从理论上将时间分岔映射为参数分岔,利用雅克比矩阵特征值运动变化判定系统的稳定性,从而验证了超高频Z源变换器呼吸现象的存在。最后根据对该变换器的分岔控制行为进行分析,确定该系统处于干扰信号下的电路参数稳定域。结论能够为超高频Z源变换器的稳定运行提供参考,对实际电路的设计提供理论依据。
英文摘要:
      Under the high frequency condition, owing to the characteristics of small volume, high efficiency, etc, Z source converter has been paid to much attention. However, in the practical operation processes, such as PV access to grid, it is more likely to generate some regular noise, i.e., the conduction and radiation interference caused by a coupling circuit make the converter show an intermittent phenomenon, which will seriously affect the stability of power system. Accordingly, a high-frequency Z source converter model with coupling interference signals is established in this paper. Through the circuit simulation and experiments, the intermittent phenomenon can be observed. Theoretically, the time bifurcation is mapped to the parameter bifurcation, and the system stability is determined by using the loci of eigenvalues of Jacobian matrix, thus verifying the existence of the intermittent phenomenon of the high-frequency Z source converter. Finally, the behavior of bifurcation control of this converter is analyzed, and the stable range of circuit parameters of the system with interference signals is determined. The conclusion of this paper can provide reference for the stable operation of the high-frequency Z source converter and a theoretical basis for the design of the actual circuit.
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