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Article

A Switched Quasi-Z-Source Inverter with Continuous Input Currents

Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark
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Author to whom correspondence should be addressed.
Energies 2020, 13(6), 1390; https://doi.org/10.3390/en13061390
Received: 17 February 2020 / Revised: 11 March 2020 / Accepted: 12 March 2020 / Published: 17 March 2020
(This article belongs to the Section Electrical Power and Energy System)
Impedance source converters as single-stage power conversion alternatives can boost and regulate the output voltages of renewable energy sources. Nevertheless, they, also known as Z-source inverters (ZSIs), still suffer from limited voltage gains and higher stresses across the components. To tackle such issues, extra diodes, passive components, and active switches can be utilized in the basic ZSIs. In this paper, a modified switched-quasi-Z-source inverter (S-qZSI) is proposed, which features continuous input currents and high boosting capability to boost output voltage by minor modifications of a prior-art topology. Furthermore, the voltage stress of the active switches is reduced, which contributes to a lower cost. The operation principles are discussed comprehensively. The performance of the proposed ZSI in terms of conversion ratio, voltage gain, and stresses on the power switches and capacitors is benchmarked with selected ZSIs. Finally, simulations and experimental tests substantiate the theoretical analysis and superior performance. View Full-Text
Keywords: Z-source inverter; impedance source inverter; quasi Z-source inverter; switched boost inverter; continuous input current; DC–AC inverter Z-source inverter; impedance source inverter; quasi Z-source inverter; switched boost inverter; continuous input current; DC–AC inverter
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MDPI and ACS Style

Yuan, J.; Yang, Y.; Blaabjerg, F. A Switched Quasi-Z-Source Inverter with Continuous Input Currents. Energies 2020, 13, 1390. https://doi.org/10.3390/en13061390

AMA Style

Yuan J, Yang Y, Blaabjerg F. A Switched Quasi-Z-Source Inverter with Continuous Input Currents. Energies. 2020; 13(6):1390. https://doi.org/10.3390/en13061390

Chicago/Turabian Style

Yuan, Jing; Yang, Yongheng; Blaabjerg, Frede. 2020. "A Switched Quasi-Z-Source Inverter with Continuous Input Currents" Energies 13, no. 6: 1390. https://doi.org/10.3390/en13061390

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