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A kilowatt-level flyback converter based on multiple input-terminal voltage multiplier for photovoltaic power generation systems

Author

Listed:
  • Zhu, BinXin
  • Luo, Huasheng
  • Li, Yang
  • She, Xiaoli
  • Yang, Yujin
  • Hashemzadeh, Seyed Majid

Abstract

This paper proposes a kilowatt-level high power flyback converter consists of basic flyback and multiple input-terminal voltage multiplier (MIVM) circuits for photovoltaic power generation systems. The proposed converter improves the transformer utilization ratio and enhances the output power level of the converter. Additionally, the proposed converter features high voltage conversion gain, which can effectively reduce the number of turns in the transformer's secondary winding in high step-up applications. An active clamp circuit is implemented to recover leakage energy, effectively suppressing the switch voltage spike during turn off and enabling zero voltage switching (ZVS), thereby further improving the efficiency of the converter. This paper provides a detailed analysis of the working principles and performance characteristics of the proposed converter. A 1 kW prototype of the proposed converter has been constructed and achieving a maximum efficiency of 97.5 %. Theoretical analysis is validated through experimental results.

Suggested Citation

  • Zhu, BinXin & Luo, Huasheng & Li, Yang & She, Xiaoli & Yang, Yujin & Hashemzadeh, Seyed Majid, 2025. "A kilowatt-level flyback converter based on multiple input-terminal voltage multiplier for photovoltaic power generation systems," Energy, Elsevier, vol. 340(C).
    • Handle: RePEc:eee:energy:v:340:y:2025:i:c:s0360544225047954
    DOI: 10.1016/j.energy.2025.139153
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