NDLI: Investigation on pulse-width amplitude modulation-based single-phase quasi-Z-source photovoltaic inverter

Content Provider	IET Digital Library
Author	Liang, Weihua Liu, Yushan Ge, Baoming Rub, Haitham Abu
Abstract	The pulse-width amplitude modulation (PWAM) method was proposed for the single-phase quasi-Z-source inverter (qZSI)-based photovoltaic (PV) power system to reduce quasi-Z-source (qZS) impedance values while improving efficiency. The method modified sinusoidal pulse-width modulation (SPWM) of the qZSI by combining pulse-amplitude modulation (PAM) and a varied dc-link voltage envelope was produced. The SPWM worked at low dc-link voltage, lowering voltage stress and avoiding shoot-through switching. The PAM worked at the varied dc-link voltage, reducing the number of switching events. As a result, the power dissipation decreased compared to working at the constant dc-link voltage. This study further investigates the PWAM-based single-phase qZS PV inverter system. An improved topology with control strategy is proposed for its grid-connected and standalone operation. Design method of impedance parameters is detailed. The performance in boost and buck operation is discussed when the single-phase qZSI using SPWM and PWAM. Simulation and experimental results verify outstanding features of the PWAM for single-phase qZSI, and the proposed approach for dual-mode operation of the PWAM-based single-phase qZS PV power system.
Starting Page	1810
Ending Page	1818
Page Count	9
ISSN	17554535
Volume Number	10
e-ISSN	17554543
Issue Number	Issue 14, Nov (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/10/14
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2016.0593
Journal	IET Power Electronics
Publisher Date	2017-07-17
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Boost Buck Operation Constant Dc-link Voltage Operation Photovoltaic Power System Power Dissipation Pulse-width Amplitude Modulation Photovoltaic Inverter PV Power System PWAM Method PWM Invertors Quasi-Z-source Impedance Value QZS Impedance Value QZSI-based Photovoltaic Power System Single-phase Quasi-Z-source Photovoltaic Inverter Sinusoidal Pulse-width Modulation Solar Power Stations
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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