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CUI Sen,CHEN Min,JU Xin,KUANG Zhiyun.Analysis of Intermittent Phenomenon of High-frequency Z Source DC/DC Converter[J].JOURNAL OF POWER SUPPLY,2019,17(2):72-78
Analysis of Intermittent Phenomenon of High-frequency Z Source DC/DC Converter
Received:March 22, 2017  Revised:October 22, 2018
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DOI:10.13234/j.issn.2095-2805.2019.2.72
Keywords:high-frequency Z source converter  coupling interference  intermittent phenomenon  time bifurcation
Fund Project:National Natural Science Foundation of China
           
AuthorInstitutionEmail
CUI Sen School of Electrical and Electronic Engineering, Chongqing University of Technology, Chongqing , China;Chongqing Energy Internet Engineering Technology Research Center, Chongqing , China 15025393060@163.com
CHEN Min School of Electrical and Electronic Engineering, Chongqing University of Technology, Chongqing , China;Chongqing Energy Internet Engineering Technology Research Center, Chongqing , China
JU Xin School of Electrical and Electronic Engineering, Chongqing University of Technology, Chongqing , China;Chongqing Energy Internet Engineering Technology Research Center, Chongqing , China
KUANG Zhiyun School of Mechanical Engineering, Chongqing University of Technology, Chongqing , China
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Abstract:
      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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