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

Jing Yuan, Yongheng Yang*, Ping Liu, Yanfeng Shen, Frede Blaabjerg

*Corresponding author

Research output: Contribution to journalJournal articleResearchpeer-review

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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.
Original languageEnglish
Article number3408
JournalEnergies
Volume13
Issue number13
Pages (from-to)1-16
Number of pages16
ISSN1996-1073
DOIs
Publication statusPublished - Jul 2020

Keywords

  • Impedance source converter
  • Z-Source inverter
  • Switched-inductor (SL)
  • Fault tolerance
  • Continuous input current

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