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Energies
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Design and Application of DC-DC Converters in Power Systems
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Design and Application of DC-DC Converters in Power Systems

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

Deadline for manuscript submissions: closed (10 October 2023) | Viewed by 7181

Special Issue Editors

Prof. Dr. Salvador Pérez Litrán

E-Mail Website
Guest Editor
Department of Electrical and Thermal Engineering, Design and Project, University of Huelva, 21007 Huelva, Spain
Interests: DC–DC converters; DC microgrid; power quality; renewable energy
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Eladio Durán Aranda

E-Mail Website
Guest Editor
Department of Electronic Engineering, University of Huelva, 21007 Huelva, Spain
Interests: electronic embedded systems; DC–DC converters
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Jorge Filipe Leal Costa Semião

E-Mail Website
Guest Editor
Institute Superior of Engineering (ISE), Universidade do Algarve, 8005-139 Faro, Portugal
Interests: power and performance efficiency in SoC (systems on-a-chip); dynamic voltage and frequency scaling; IoT electronics and applications
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The Guess Editors invite you to submit your work to a Special Issue of Energies on “Design and Application of DC–DC Converters in Power Systems”. DC–DC converters are present in most applications of high, medium, and low power, as well as high, medium, and low voltage/current. These power converter types have acquired important relevance in power systems due to the high penetration of renewable energies and storage systems in the electrical grid. They are present in most grid connection circuits of distributed generation systems since they allow controlling the energy flow between source and grid on the DC side.

This Special Issue deals with the study of new DC–DC converter topologies, control techniques, and their use in power systems.

Topics of interest for publication include but are not limited to:

  • Distributed electrical systems;
  • Management and control of electrical systems;
  • DC microgrids;
  • New DC–DC converter control techniques, multi-objective scheduling, artificial intelligence, and optimization techniques;
  • Quality of electric power systems;
  • New DC–DC converter topologies;
  • Grid connection of energy storage;
  • Bidirectional DC–DC converters;
  • Energy management;
  • DC–DC converters in protection systems;
  • DC–DC converters in plug-in electric vehicle charging stations;
  • Smart grid.

Prof. Dr. Salvador Pérez Litrán
Prof. Dr. Eladio Durán Aranda
Prof. Dr. Jorge Filipe Leal Costa Semião
Guest Editors

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

  • power electronics
  • power systems
  • dc–dc converters
  • control techniques
  • distributed generation
  • renewable energy
  • energy storage systems

Published Papers (4 papers)

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Research

16 pages, 4929 KiB  
Article
A High Conversion Ratio DC–DC Boost Converter with Continuous Output Current Using Dual-Current Flows
by Hwa-Soo Kim and Se-Un Shin
Energies 2023, 16(8), 3603; https://0-doi-org.brum.beds.ac.uk/10.3390/en16083603 - 21 Apr 2023
Viewed by 1742
Abstract
Recently, the demand for small, low-cost electronics has increased the use of cost-effective tiny inductors in power-management ICs (PMICs). However, the conduction loss caused by the parasitic DC resistance (RDCR) of a small inductor leads to low efficiency, which reduces [...] Read more.
Recently, the demand for small, low-cost electronics has increased the use of cost-effective tiny inductors in power-management ICs (PMICs). However, the conduction loss caused by the parasitic DC resistance (RDCR) of a small inductor leads to low efficiency, which reduces the battery usage time and may also cause thermal problems in mobile devices. In particular, these issues become critical when a conventional boost converter (CBC) is used to achieve high-output voltage due to the large inductor current. In addition, as the output voltage increases, a number of issues become more serious, such as large output voltage ripple, conversion-ratio limit, and overlap loss. To solve these issues, this paper proposed a high-voltage boost converter with dual-current flows (HVDF). The proposed HVDF can achieve a higher efficiency than a CBC by reducing the total conduction loss in heavy load current conditions with a small inductor. Moreover, because in the HVDF, the current delivered to the output becomes continuous, unlike in the CBC with its discontinuous output delivery current, the output voltage ripple can be significantly reduced. Also, the conversion gain of the HVDF is less sensitive to RDCR than that of the CBC. To further increase the conversion gain, a time-interleaved charge pump can be connected in series with the HVDF (HVDFCP) to achieve higher output voltage beyond the limit of the conversion gain in the HVDF while maintaining the advantages of a low inductor current and small output voltage ripple. Simulations using PSIM were performed along with a detailed numerical analysis of the conduction losses in the proposed structures. The simulation results were discussed and compared with those of the conventional structures. Full article
(This article belongs to the Special Issue Design and Application of DC-DC Converters in Power Systems)
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30 pages, 7934 KiB  
Article
A Modular Circuit Synthesis Oriented Modelling Approach for Non-Isolated DC-DC Converters in CCM
by Lebogang Masike and Michael Njoroge Gitau
Energies 2023, 16(3), 1047; https://0-doi-org.brum.beds.ac.uk/10.3390/en16031047 - 17 Jan 2023
Cited by 4 | Viewed by 1360
Abstract
The continued commissioning of DC microgrids in an effort to achieve net-zero carbon levels in the atmosphere demands the large-scale deployment of converters to make the power from renewable energy sources, such as solar PV, usable. To control these inherently non-linear converters using [...] Read more.
The continued commissioning of DC microgrids in an effort to achieve net-zero carbon levels in the atmosphere demands the large-scale deployment of converters to make the power from renewable energy sources, such as solar PV, usable. To control these inherently non-linear converters using classical linear control methods, averaged modelling techniques are employed. These methods are laborious and easily become intractable when applied to converters with increased energy storage elements. A modular modelling approach is proposed. This approach is based on the synthesis of converters using refined basic building blocks. The refined basic building blocks are independently modelled as two-port networks and used in a circuit synthesis-oriented manner to derive power stage models of commonly used DC-DC converters. It is found that most of the converters considered in the study can be described as a cascade combination of these basic building blocks. As such, transmission parameters are mainly used to model the two-port networks. Moreover, it is also found that using this modelling technique enables the computation of generalized expressions for all power stage models of interest. The use of two-port networks curtails the size of the matrices describing the basic building blocks to 2 × 2, and thus simplifies the entire modelling procedure. Additionally, two-port network analysis makes this modelling technique modular, thus making it more suited to be employed in DC microgrids. The independence of the two-port models on the circuit topology and functionality makes it possible to even model new converters containing the described basic building blocks solely based on circuit connection. Full article
(This article belongs to the Special Issue Design and Application of DC-DC Converters in Power Systems)
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22 pages, 9213 KiB  
Article
High Step-Up Three-Level Soft Switching DC-DC Converter for Photovoltaic Generation Systems
by Seyed Shahriyar Taghavi, Mahdi Rezvanyvardom, Amin Mirzaei and Saman A. Gorji
Energies 2023, 16(1), 41; https://0-doi-org.brum.beds.ac.uk/10.3390/en16010041 - 21 Dec 2022
Cited by 5 | Viewed by 1714
Abstract
In this paper, a high step-up three-level DC–DC converter with a symmetric structure for PV application is proposed. The converter has high voltage gain. This is achieved due to the use of two high step-up cells and two resonant paths in its structure. [...] Read more.
In this paper, a high step-up three-level DC–DC converter with a symmetric structure for PV application is proposed. The converter has high voltage gain. This is achieved due to the use of two high step-up cells and two resonant paths in its structure. The converter has low input current ripples and the voltage stress across all switches is equal to half of the output voltage. The proposed converter uses simple pulse–width modulation (PWM) to trigger the switches. Hence, the proposed converter benefits from a simple structure and control circuit. All semiconductor devices are turned on/off under ZCS conditions. Thus, the switching losses are decreased, and the total efficiency is increased. The converter is implemented and tested through a laboratory prototype. The experimental results verify the theoretical analysis. Full article
(This article belongs to the Special Issue Design and Application of DC-DC Converters in Power Systems)
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18 pages, 5611 KiB  
Article
A Novel Horse Racing Algorithm Based MPPT Control for Standalone PV Power Systems
by Sy Ngo, Chian-Song Chiu and Thanh-Dong Ngo
Energies 2022, 15(20), 7498; https://0-doi-org.brum.beds.ac.uk/10.3390/en15207498 - 12 Oct 2022
Cited by 4 | Viewed by 1436
Abstract
This paper proposes a novel maximum power point tracking (MPPT) method inspired by the horse racing game for standalone photovoltaic (PV) power systems, such that the highest PV power conversion efficiency is obtained. From the horse racing game rules, we develop the horse [...] Read more.
This paper proposes a novel maximum power point tracking (MPPT) method inspired by the horse racing game for standalone photovoltaic (PV) power systems, such that the highest PV power conversion efficiency is obtained. From the horse racing game rules, we develop the horse racing algorithm (HRA) with the qualifying stage and final ranking stage. The MPP can be searched even if there exist multiple local MPPs for the PV power system. Moreover, from the proposed horse racing algorithm, the calculation is reduced, so that the transient searching points are less than traditional methods, i.e., the transient oscillation is less during the MPPT control. Therefore, the HRA based MPPT method avoids local maximum power traps and achieves the MPP quickly even if considering partial shading influence and varying environment for PV panels. Evidence of the accuracy and effectiveness of the proposed HRA method is exhibited by simulation results. These results are also compared with typical particle swarm optimization (PSO) and grey wolf optimization (GWO) methods and shown better convergence time as well as transient oscillation. Within the range from 0.34 to 0.58 s, the proposed method has effectively tracked the global maximum power point, which is from 0.42 to 0.48 s faster than the conventional PSO technique and from 0.36 to 0.74 s faster than the GWO method. Finally, the obtained findings proved the effectiveness and superiority of the proposed HRA technique through experimental results. The fast response in terms of good transient oscillation and global power tracking time of the proposed method are from 0.40 to 1.0 s, while the PSO and GWO methods are from 1.56 to 1.6 s and from 1.9 to 2.2 s, respectively. Full article
(This article belongs to the Special Issue Design and Application of DC-DC Converters in Power Systems)
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