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

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

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Abstrakt

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.
OriginalsprogEngelsk
Artikelnummer3408
TidsskriftEnergies
Vol/bind13
Udgave nummer13
Sider (fra-til)1-16
Antal sider16
ISSN1996-1073
DOI
StatusUdgivet - jul. 2020

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