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Modified Impedance-Source Inverter with Continuous Input Currents and Fault-Tolerant Operations

Author

Listed:
  • Jing Yuan

    (Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark)

  • Yongheng Yang

    (Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark)

  • Ping Liu

    (College of Electrical and Information Engineering, Hunan University, Changsha 410082, China)

  • Yanfeng Shen

    (Department of Engineering-Electrical Engineering Division, University of Cambridge, Cambridge CB3 0FA, UK)

  • Frede Blaabjerg

    (Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark)

Abstract

Impedance-source (Z-source) inverters are increasingly adopted in practice, where a high voltage gain is required. However, issues like drawing a non-continuous current from the DC source and ceasing the energy supply under DC source faults are also observed. In this paper, an embedded enhanced-boost Z-source inverter (EEB-ZSI) is thus proposed to tackle the issues. The proposed EEB-ZSI employs two DC sources, which enable the continuous input current and fault-tolerant operations (e.g., open-circuit and short-circuit faults in the DC sources). The operational principles are presented in detail with an in-depth circuit analysis. Moreover, the proposed EEB-ZSI is benchmarked with prior-art Z-source inverters. Experimental tests further demonstrate the effectiveness of EEB-ZSI regarding the continuous input current and flexible fault tolerance.

Suggested Citation

  • Jing Yuan & Yongheng Yang & Ping Liu & Yanfeng Shen & Frede Blaabjerg, 2020. "Modified Impedance-Source Inverter with Continuous Input Currents and Fault-Tolerant Operations," Energies, MDPI, vol. 13(13), pages 1-16, July.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:13:p:3408-:d:379512
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    References listed on IDEAS

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    1. Jing Yuan & Yongheng Yang & Frede Blaabjerg, 2020. "A Switched Quasi-Z-Source Inverter with Continuous Input Currents," Energies, MDPI, vol. 13(6), pages 1-12, March.
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