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On the Equivalence of the Switched Inductor and the Tapped Inductor Converters and its Application to Small Signal Modelling
Open AccessFeature PaperArticle

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

1
Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark
2
College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
3
Department of Engineering-Electrical Engineering Division, University of Cambridge, Cambridge CB3 0FA, UK
*
Author to whom correspondence should be addressed.
Energies 2020, 13(13), 3408; https://doi.org/10.3390/en13133408
Received: 28 May 2020 / Revised: 18 June 2020 / Accepted: 26 June 2020 / Published: 2 July 2020
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. View Full-Text
Keywords: impedance source converter; Z-source inverter; switched-inductor; fault-tolerant; continuous input current impedance source converter; Z-source inverter; switched-inductor; fault-tolerant; continuous input current
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MDPI and ACS Style

Yuan, J.; Yang, Y.; Liu, P.; Shen, Y.; Blaabjerg, F. Modified Impedance-Source Inverter with Continuous Input Currents and Fault-Tolerant Operations. Energies 2020, 13, 3408.

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