TZ-Source Inverters

Nguyen, Minh-Khai; Lim, Young‐Cheol; Kim, Yi-Gon

doi:10.1109/tie.2012.2229678

Cited by 186 publications

(108 citation statements)

References 22 publications

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“…The input inductor current ripple and the flux density swing are smaller than QZSI, for the similar input values the inductor current is very low, the flux density and no. of turns or core size of inductor L 1 is smaller in the Switched-Coupled Inductor Quasi Z-Source Inverter [37]- [38].…”

Section: Two Switched-inductor Quasi-z-source Invertermentioning

confidence: 99%

Quasi-Z-Source Inverter Topologies with Reduced Device Rating: a Review

Rajan¹,

Premalatha²

2017

IJPEDS

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Quasi-Z-Source Inverter (QZSI) has introduced a new wave of interest in engineering industry and research. Reduction in device rating has been the main objective in introducing QZSI topologies. The introduced topologies in QZSI have proven to be feasible in a wide range for high power with medium voltage applications. This paper mainly focuses on QZSI topologies with continuous input current conduction and also power conditioning in the renewable energy system. Based on a detailed comparison of these topologies suitable QZSI can be arrived for a given application. Keyword:Continuous input current Quasi Z-Source inverter Reduced device rating Copyright © 2017 Institute of Advanced Engineering and Science.All rights reserved. Corresponding Author:Premalatha L., School of Electrical Engineering, VIT University, Chennai -600 027, India. Email: premalatha.l@vit.ac.in INTRODUCTIONQuasi-Z-Source Inverter (QZSI) is derived from the original Z-Source Inverter (ZSI) where it can be utilized to all power converters i.e., DC-AC, DC-DC, AC-DC, AC-AC. ZSI can operate in boost inverter or buck inverter but not as buck-boost inverter [1]- [3].By introducing QZSI some of the disadvantages in traditional ZSI can be overcome. The QZSI has the wide range of applicability in the renewable energy system, where it gives a single stage power conversion with buck-boost characteristics and improve the reliability of the inverter [4]- [8]. In shoot through states, both power switches in a leg are turned on at the same time and it is used to step up the voltage and the output voltage in QZSI can be boost to designed value. Research based on these QZSI has concentrated on modelling and control, photovoltaic and other electrical applications. The QZSI can buck and boost the input voltage in single stage with two control variables; shoot through and modulation index. New topologies of QZSI which has been derived from original ZSI can be proposed for PV applications, because of continuous input current and reduced capacitor rating. QZSI has a prescribed application to combine with renewable energy system for a wide voltage range to distribute for power grid [9]- [12].Moreover, the voltage stress on capacitors and current stress on inductors and diodes in QZSI are lower than traditional ZSI for same input and output voltage. QZSI avoids inrush current at starting, where destroy of the devices can be avoided and also these topologies are more viable for solar cell and fuel cell applications it may acquire high voltage gain to match the source voltage difference [13], where for the same input and output voltages, it can use lower duty cycle and higher modulation index, which results in less switching stresses, better output power and lower input current ripple. The advantage of including inductors in the QZSI network will limit the current ripple through the devices during boost conversion mode.

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Section: Two Switched-inductor Quasi-z-source Invertermentioning

confidence: 99%

Quasi-Z-Source Inverter Topologies with Reduced Device Rating: a Review

Rajan¹,

Premalatha²

2017

IJPEDS

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“…Thus, the control strategies are not efficient to improve the boost ability. Another solution is to change the structure of Zsource network, which has been studied extensively [9][10][11][12][13][14][15][16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

“…Trans-Z-source inverter, TZ-source inverter and Γ-Zsource inverter derived from original ZSI / qZSI are presented in [15][16][17], where coupled inductors are used to replace the separated ones. Thus the dc link voltage is boosted according to the changes of turn ratios or shootthrough duty ratio.…”

Section: Introductionmentioning

confidence: 99%

An Extended Switched-inductor Quasi-Z-source Inverter

Deng¹,

Mei²,

Mashino³

et al. 2014

Journal of Electrical Engineering and Technology

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-In this paper, an extended switched-inductor quasi-Z-source inverter (ESL-qZSI) with high boost voltage inversion ability is presented, which combines the SL-qZSI with the traditional boost converter, as well as improves the switched-inductor cell. Compared with the classic qZSI topologies, the proposed topology reduces the voltage stresses of capacitors, power devices and diodes for the same input and output voltage. Furthermore, the conversion efficiency is improved. The operation principle of the proposed topology is analyzed in details, which is followed by the comparison between the three topologies. In addition, the performance of the proposed topology is verified by simulations and experiments.

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“…The TZ-source inverter [18] can achieve higher voltage boost capability than single transformer ZSI topologies, thereby reducing the turn ratio requirements for the transformers. However, the turn ratio must be increased to raise the voltage gain.…”

Section: Introductionmentioning

confidence: 99%

A dual transformer based Z-source inverter with enhanced voltage boost capability

Soon

Low

2014

2014 9th IEEE Conference on Industrial Electronics and Applications

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Transformer based Z-source inverters have attracted more attention recently due to the advantages of reduced component count and its maximized use of the modulation index. In this paper, a new type of dual transformer based Z-source inverter is proposed. It uses two -source networks mirroring each other to form the sigma network. The proposed topology has the advantage of increasing the input to output voltage gain by reducing the turn ratio resulting in a smaller transformer for high voltage gain applications. The operating principle, simulation results and experimental work are presented.

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TZ-Source Inverters

Cited by 186 publications

References 22 publications

Quasi-Z-Source Inverter Topologies with Reduced Device Rating: a Review

Quasi-Z-Source Inverter Topologies with Reduced Device Rating: a Review

An Extended Switched-inductor Quasi-Z-source Inverter

A dual transformer based Z-source inverter with enhanced voltage boost capability

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