Ripple Vector Cancellation Modulation Strategy for Single-Phase Quasi-Z-Source Inverter

Yufeng Tang, Zhiyong Li, Yougen Chen and Renyong Wei
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Yufeng Tang: School of Automation, Central South University, Changsha 410083, China
Zhiyong Li: School of Automation, Central South University, Changsha 410083, China
Yougen Chen: School of Automation, Central South University, Changsha 410083, China
Renyong Wei: School of Automation, Central South University, Changsha 410083, China

Energies, 2019, vol. 12, issue 17, 1-12

Abstract: The double-frequency (2ω) power flows through the DC side of the single-phase quasi-Z-source inverter (QZSI) leads to the 2ω voltage ripple of capacitors and 2ω current ripple of inductors. This paper proposes a ripple vector cancellation modulation strategy (RVCMS) based on the thought of ripple vector cancellation. By analyzing the mechanism of ripple generation and transmission, we can obtain a variation of a shoot-through duty cycle to generate a compensated 2ω ripple used to cancel the 2ω current ripple of inductors caused by the 2ω ripple of DC link current, and the 2ω compensated variation of a shoot-through duty cycle with a specific amplitude and phase is added to the constant shoot-through duty cycle. Finally, simulation and experimental results demonstrate the correctness and effectiveness of the proposed modulation strategy for the single-phase QZSI.

Keywords: quasi-Z-source inverter; double-frequency ripple; ripple vector cancellation; shoot-through duty cycle; modulation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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