CJEE

Chinese Journal of Electrical Engineering ›› 2019, Vol. 5 ›› Issue (2): 63-71.

• Orginal Article • Previous Articles     Next Articles

扫码分享

Stability-improvement Method of Cascaded DC-DC Converters with Additional Voltage-error Mutual Feedback Control*

Zhongya Guo, Hong Li*, Chen Liu, Yangyang Zhao, Wenzhe Su   

  1. School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China
  • Online:2019-06-20 Published:1900-01-01
  • About author:Zhongya Guo was born in Hebei, China, in 1995. She received the B.S. degree from the Hebei University of Technology, Tianjin, China, in 2016. She is currently working toward the M.S. degree in electrical engineering at the School of Electrical Engineering, Beijing Jiaotong University, Beijing, China.
    Her current research interest includes nonlinear modeling and analysis of power electronic systems.
    Hong Li (S’07–M’09–SM’18) received the B.Sc., M.Sc., and Ph.D. degrees from the Taiyuan University of Technology, China, South China University of Technology, China, and FernUniversität in Hagen, Germany, in 2002, 2005, and 2009, respectively.
    She is currently a Professor with the School of Electrical Engineering, Beijing Jiaotong University, Beijing, China. Her research interests include nonlinear modeling, analysis and its applications, EMI suppression methods for power electronic systems, and wide-band-gap power devices and their applications.
    Dr. Li is an Associate Editor of the IEEE Transactions on Industrial Electronics, Associate Editor of the Chinese Journal of Electrical Engineering, and Vice Chairman of the Electromagnetic Compatibility Specialized Committee in China Power Supply Society. She has published 1 book, 30 journal papers, and 39 conference papers. She has also applied for 20 patents.
    Chen Liu was born in Tianjin, China, in 1994. He received the B.S. degree from Wuhan University of Technology, Wuhan, Hubei, China, in 2017. He is currently working toward the M.S. degree in electrical engineering at the School of Electrical Engineering, Beijing Jiaotong University, Beijing, China.
    His current research interests include nonlinear modeling and analysis of power electronic systems.
    Yangyang Zhao was born in Henan, China, in 1995. She received the B.S. degree from Beijing Forestry University, Beijing, China, in 2017. She is currently working toward the M.S. degree in electrical engineering at the School of Electrical Engineering, Beijing Jiaotong University, Beijing, China.
    Her current research interest includes nonlinear modeling and analysis of power electronic systems.
    Wenzhe Su was born in Shanxi, China, in 1993. He received the B.Sc. degree in electrical engineering from Shanxi University, Shanxi, China, in 2016. He is currently working toward the Ph.D. degree in electrical engineering at the School of Electrical Engineering, Beijing Jiaotong University, Beijing, China.
    His research interest includes applications of power electronics in power systems and renewable energy.
  • Supported by:
    hli@bjtu.edu.cn

PDF

234

Abstract: The interaction between the source and load converters in cascaded DC-DC converters may cause instability. Thus, improving the stability of cascaded DC-DC converters is important. To solve the above-mentioned problem, a flowchart to improve the control method is established by calculating the eigenvalue sensitivity of a time-domain model of cascaded DC-DC converters. Further, an additional voltage-error mutual feedback control method is firstly proposed based on the flowchart provided in this study to improve the stability of cascaded DC-DC converters. Subsequently, the influence of the proposed mutual feedback control on the stability of cascaded DC-DC converters is analyzed. Finally, the effectiveness of the proposed control method is verified by simulation and experiment.

Key words: Cascaded DC-DC converters, stability improvement, time-domain model, eigenvalue sensitivity