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Energies
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Impedance Source Converters: Topologies, Control, and Applications
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Impedance Source Converters: Topologies, Control, and Applications

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "F3: Power Electronics".

Deadline for manuscript submissions: closed (10 December 2021) | Viewed by 9528

Special Issue Editor

Prof. Dr. Dmitri Vinnikov

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Guest Editor
Department of Electrical Power Engineering and Mechatronics, School of Engineering, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia
Interests: power electronics; renewable energy; photovoltaics; electrical engineering; impedance-source converters
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Research in the field of impedance source converters was initiated in 2002 following the invention of the Z-Source inverter. Z-Source inverters are able to provide buck–boost functionality by the single switching stage and improved reliability due to the inherent short-circuit immunity. These advantages urge active research in the field of impedance source inverters. The impedance source technology was applied to all four basic converter types: DC–AC, DC–DC, AC–AC, and AC–DC. Impedance source converters are applied in a very broad area: from modern energy generation systems (renewable and alternative) to DC circuit breakers and electronic loads. To promote further research and development of impedance source converters and to provide a common environment for presentation and discussion on their emerging research, development, and applications, we propose a special session on the impedance source converter topologies and their applications.

Topics of interest include but are not limited to the following:

- New topologies of impedance source networks;
- Multilevel and multiphase impedance source converters;
- Impedance source DC–DC converters;
- Impedance source DC–AC and AC–DC converters;
- Impedance source matrix converters;
- Control strategies of impedance source converters;
- Design considerations for power and control stages;
- Loss analysis and losses minimization methods;
- Reliability issues;
- Review and challenges on impedance source converters;
- Applications of impedance source converters in electric drives;
- Applications of impedance source converters in renewable energy and grid connected systems, such as in:

  1. Photovoltaic systems
  2. Fuel cell systems
  3. Wind turbine systems
  4. Energy storage systems
  5. Hybrid systems

Prof. Dr. Dmitri Vinnikov
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Z-source converters
  • topologies, modulation, control strategies and their applications

Published Papers (4 papers)

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Research

21 pages, 7137 KiB  
Article
An Embedded Half-Bridge Γ-Z-Source Inverter with Reduced Voltage Stress on Capacitors
by Hamed Mashinchi Maheri, Dmitri Vinnikov, Mohsen Hasan Babayi Nozadian, Elias Shokati Asl, Ebrahim Babaei and Andrii Chub
Energies 2021, 14(19), 6433; https://0-doi-org.brum.beds.ac.uk/10.3390/en14196433 - 08 Oct 2021
Cited by 5 | Viewed by 1664
Abstract
In this paper, an embedded half-bridge Z-source inverter based on gamma structure is proposed. In contrast with the classical half-bridge inverter, the proposed inverter can generate zero voltage levels in output. High voltage gain and low voltage stress on capacitors are the main [...] Read more.
In this paper, an embedded half-bridge Z-source inverter based on gamma structure is proposed. In contrast with the classical half-bridge inverter, the proposed inverter can generate zero voltage levels in output. High voltage gain and low voltage stress on capacitors are the main advantages of the proposed converter. The value of the boost factor in the proposed structure is increased by changing both the shoot-through (ST) duty cycle and turns ratio of the transformer. The operating principle of the proposed converter in four operating modes is presented. We also calculate the critical inductance and compare the proposed converter with conventional topologies. In addition, power loss and THD analysis are presented. Finally, PSCAD/EMTDC software is used to verify the correct operation of the proposed inverter and the experimental results. Full article
(This article belongs to the Special Issue Impedance Source Converters: Topologies, Control, and Applications)
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20 pages, 5180 KiB  
Article
Lyapunov-Function-Based Controller for Single-Phase NPC Quasi-Z-Source Inverter with 2ω Frequency Ripple Suppression
by Sertac Bayhan and Hasan Komurcugil
Energies 2021, 14(1), 140; https://0-doi-org.brum.beds.ac.uk/10.3390/en14010140 - 29 Dec 2020
Cited by 1 | Viewed by 1946
Abstract
This paper proposes a high-performance control technique based on Lyapunov’s stability theory for a single-phase grid-connected neutral-point-clamped quasi-impedance source inverter with LCL filter. The Lyapunov function based control is employed to regulate the inverter output current, whereas the proportional resonant controller is used [...] Read more.
This paper proposes a high-performance control technique based on Lyapunov’s stability theory for a single-phase grid-connected neutral-point-clamped quasi-impedance source inverter with LCL filter. The Lyapunov function based control is employed to regulate the inverter output current, whereas the proportional resonant controller is used to produce the reference of the inverter output current that is needed in the Lyapunov function based control. Use of proportional resonant controller ensures the zero steady-state error in the grid current. An important feature of the proposed Lyapunov function based control is the achievement of resonance damping without using a dedicated damping method. Furthermore, the modified simple boost control technique is proposed to eliminate the double-line frequency ripples in the quasi-impedance source inductor currents and minimize the double-line frequency ripples in the quasi-impedance source capacitor voltages. The proposed control technique considerably reduces the inverter size, weight, and cost as well as increases overall system efficiency since the required inductances and capacitances sizes are lower. Experimental results obtained from a 2.5 kW neutral-point-clamped quasi-impedance source inverter prototype are presented to validate the performance of the Lyapunov function based control technique. Full article
(This article belongs to the Special Issue Impedance Source Converters: Topologies, Control, and Applications)
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21 pages, 5837 KiB  
Article
Impact of Transformer Turns Ratio on the Power Losses and Efficiency of the Wide Range Isolated Buck–Boost Converter for Photovoltaic Applications
by Hamed Mashinchi Maheri, Dmitri Vinnikov, Andrii Chub, Vadim Sidorov and Elizaveta Liivik
Energies 2020, 13(21), 5645; https://0-doi-org.brum.beds.ac.uk/10.3390/en13215645 - 28 Oct 2020
Cited by 7 | Viewed by 2302
Abstract
In this paper, the impact of transformer turns ratio on the performance of the quasi-Z-source galvanically isolated DC-DC converters is studied. Embedded buck–boost functionality enables these converters to regulate the input voltage and load in a wide range, which makes them suitable for [...] Read more.
In this paper, the impact of transformer turns ratio on the performance of the quasi-Z-source galvanically isolated DC-DC converters is studied. Embedded buck–boost functionality enables these converters to regulate the input voltage and load in a wide range, which makes them suitable for such demanding application as photovoltaic microconverters. The isolation transformer here plays a central role as its turns ratio defines the point of transition between the boost and buck modes and overall capability of the converter to regulate the input voltage in a wide range at high efficiency. The studied quasi-Z-source galvanically isolated DC-DC converter is benchmarked in terms of power loss of components and weighted power conversion efficiency for three different turns ratios of isolation transformer to achieve the best and optimized turns ratio lead to the efficient operation. Operation in a wide range of input voltage at high efficiency is the main criterion for assessing the effect of turns ratio on the efficiency of the converter. The proposed loss model and theoretical predictions of the efficiency were validated with the help of a 300 W experimental prototype of the photovoltaic microconverter based on the quasi-Z-source galvanically isolated DC-DC converter topology. Full article
(This article belongs to the Special Issue Impedance Source Converters: Topologies, Control, and Applications)
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20 pages, 4180 KiB  
Article
A Three-Level DC-Link Quasi-Switch Boost T-Type Inverter with Voltage Stress Reduction
by Vinh-Thanh Tran, Duc-Tri Do, Van-Dung Do and Minh-Khai Nguyen
Energies 2020, 13(14), 3727; https://0-doi-org.brum.beds.ac.uk/10.3390/en13143727 - 20 Jul 2020
Cited by 4 | Viewed by 2557
Abstract
In recent years, the three-level T-Type inverter has been considered the best choice for many low and medium power applications. Nevertheless, this topology is known as a buck converter. Therefore, in this paper, a new topology incorporating the dc-link type quasi-switched boost network [...] Read more.
In recent years, the three-level T-Type inverter has been considered the best choice for many low and medium power applications. Nevertheless, this topology is known as a buck converter. Therefore, in this paper, a new topology incorporating the dc-link type quasi-switched boost network with the traditional three-level T-type inverter is proposed to overcome the limit of traditional three-level T-Type inverter. The space vector pulse width modulation scheme is considered to control this topology, which provides some benefits such as enhancing modulation index and reducing the magnitude of common-mode voltage. For this scheme, the zero, medium, and large vectors are utilized to generate the output voltage. The shoot-through state which is adopted by turning on all power switches of inverter leg is inserted into zero vector to boost the dc-link voltage. As a result, there is no distortion at the output waveform. The control signal of intermediate network power switches is also detailed to improve the boost factor and voltage gain. As a result, the voltage stress on power devices like capacitors, diodes, and switches is decreased significantly. To demonstrate the outstanding of proposed structure and its control strategy, some comparisons between the proposed method and other ones are performed. Simulation and experimental prototype results are conducted to verify the accuracy of the theory and effectiveness of the inverter. Full article
(This article belongs to the Special Issue Impedance Source Converters: Topologies, Control, and Applications)
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