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Energies
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Power Converters for Energy Conversion: Design, Control and Applications
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Power Converters for Energy Conversion: Design, 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 (30 November 2024) | Viewed by 7762

Special Issue Editors

Dr. Fabio Corti

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Guest Editor
Dipartimento di Ingegneria, Università di Perugia, Via G. Duranti 67, 06125 Perugia, Italy
Interests: power electronics; DC–DC converter; DC–AC inverter; renewable energy; solar energy and photovoltaic systems; wireless power transfer; smart grids; power quality
Special Issues, Collections and Topics in MDPI journals
Dr. Luigi Solimene

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Guest Editor
Dipartimento Energia “Galileo Ferraris”, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, TO, Italy
Interests: magnetic materials; DC–DC converters,; finite element simulations; wireless power transfer; power electronics

Special Issue Information

Dear Colleagues,

Power systems and power electronics have traditionally occupied two distinct worlds, with different dynamic characteristics and issues, dedicated analysis tools, modeling approaches, and scopes of interest. The increasing integration of renewable energy sources is currently causing these two worlds to merge, and the need to fill the gaps between them has triggered the intense involvement of both academia and industry. This Special Issue is dedicated to the aspects related to the integration of power electronics in power systems through studies, analyses, simulations, projects, experiments, and all other possible paths that can be followed to disclose the key points for the assessment of future power systems with power electronics. This Special Issue is the ideal place for works focusing on the dynamics of power systems and power electronics.

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

  • DC–DC, AC–DC, and DC–AC converter design procedures (innovative topologies, steady-state analysis, etc.)
  • Control strategies for power converters
  • Conventional grid-following and emerging grid-forming control structures
  • Investigation of system stability with time-domain methods (phasors, EMT) and other analytical methods (modal analysis, state-space models, transfer functions, impedance-based methods)
  • Numerical methods for circuit and electromagnetic field simulations
  • Characterization and modeling of power switches
  • Characterization and modeling of passive components (inductors, transformers, capacitors)

These topics can be addressed from different angles and perspectives, from more element-focused studies to more system-focused analyses, from large-scale power systems to microgrids and small isolated electrical networks. All papers addressing the integration of power electronics in power systems are welcome for consideration.

Dr. Fabio Corti
Dr. Luigi Solimene
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 systems
  • power electronics
  • renewable energy sources
  • hvdc
  • power systems dynamics
  • power systems stability
  • power systems control
  • power converters
  • grid-following
  • grid-forming
  • wireless power transfer
  • numerical methods
  • circuit simulation
  • electromagnetic field simulation
  • design optimization

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Published Papers (6 papers)

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Research

27 pages, 12423 KiB  
Article
Voltage Control Nonlinearity in QZSDMC Fed PMSM Drive System with Grid Filtering
by Przemysław Siwek and Konrad Urbanski
Energies 2025, 18(6), 1334; https://doi.org/10.3390/en18061334 - 8 Mar 2025
Viewed by 417
Abstract
This publication investigates the control of output voltage-boosting in a Quasi-Z-Source direct matrix converter operating as part of a PMSM drive system with an RLC grid filter. The structure and control algorithms enabling regulation of the converter’s output voltage in both step-down and [...] Read more.
This publication investigates the control of output voltage-boosting in a Quasi-Z-Source direct matrix converter operating as part of a PMSM drive system with an RLC grid filter. The structure and control algorithms enabling regulation of the converter’s output voltage in both step-down and step-up modes are presented. These methods are based on the dq transformation, which provides a measurement signal for a linear PI-type controller. The article includes simulation results obtained using Matlab Simulink 2019a, which facilitated the preliminary verification of the applied structures and methods. The obtained model revealed the presence of nonlinearities in the Quasi-Z-Source voltage control system, which were subsequently confirmed through experimental verification. The system is stable but exhibits oscillatory behavior, with its parameters dependent on the amplitude of the step of the voltage gain coefficient. The voltage control system regulates the output voltage at least 10 times faster than a single period of the grid voltage sine wave. To enhance voltage control, a tunable controller with optimized parameters was proposed. The conducted studies demonstrated a 16.5% improvement in the IAE index and faster settling time for Quasi-Z-Source voltage control using the proposed controller compared to the reference controller. Full article
(This article belongs to the Special Issue Power Converters for Energy Conversion: Design, Control and Applications)
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18 pages, 10854 KiB  
Article
Analysis and Research on the Influence of a Magnetic Field Concentrator on the Gear Heating Process Using a High-Frequency Resonant Inverter
by Piotr Legutko
Energies 2025, 18(5), 1096; https://doi.org/10.3390/en18051096 - 24 Feb 2025
Viewed by 470
Abstract
The article presents basic information about the induction heating of gears, which are widely used in various industries. This article presents the methodology and results of a coupled FEM simulation of a circuit model for a power electronics converter connected to an inductor-charged [...] Read more.
The article presents basic information about the induction heating of gears, which are widely used in various industries. This article presents the methodology and results of a coupled FEM simulation of a circuit model for a power electronics converter connected to an inductor-charged heating system. The induction heating of gears was performed using a high-frequency inverter with SiC MOSFET transistors. A prototype inverter was built using a full-bridge structure with a series-parallel resonant circuit. The operating frequency was 350 kHz, the output power of the inverter was 3.5 kW, and the drain efficiency was equal to 96%. Coupled simulation was performed for a charge in the form of a gear made of 42CrMo4 steel (material parameters are provided in the article) for two types of heating: with and without a magnetic field concentrator. In addition, the article presents the results of co-simulation studies in the following form: a distribution of magnetic induction in the gear, energy density in the gear, the characteristics of energy density in a single tooth on the 8 mm length and the temperature of the tooth tip for two types of induction heating. Full article
(This article belongs to the Special Issue Power Converters for Energy Conversion: Design, Control and Applications)
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30 pages, 5973 KiB  
Article
Versatile LCL Inverter Model for Controlled Inverter Operation in Transient Grid Calculation Using the Extended Node Method
by Daniela Vorwerk and Detlef Schulz
Energies 2025, 18(2), 344; https://doi.org/10.3390/en18020344 - 14 Jan 2025
Viewed by 696
Abstract
Due to increasing decentralized power applications, power electronics are gaining importance, also in distribution grids. Since their scope of investigation is diverse, their versatile models and their use in grid calculations are important. In this work, a three-phase grid-synchronous inverter with an LCL [...] Read more.
Due to increasing decentralized power applications, power electronics are gaining importance, also in distribution grids. Since their scope of investigation is diverse, their versatile models and their use in grid calculations are important. In this work, a three-phase grid-synchronous inverter with an LCL filter is considered. It is defined as a component of the “Extended Node Method” to make it applicable in this node-based transient grid calculation method. Because the component stucture always looks the same and the construction of the grid system of equations always follows the same, straightforward process, the model can be applied easily and several times to large network calculations. Furthermore, an approach is developed for how inverter control algorithms are interconnected with the method’s results in the time domain. This allows for the fast analysis of converter control schemes in different grid topologies. To evaluate its accuracy, the developed approach is compared to equivalent calculations with Simulink and shows very good agreement, also for steep transients. In the long term, this model is intended to bridge the gap to other DC systems like electrochemical components and to gas and heating networks with the Extended Node Method. Full article
(This article belongs to the Special Issue Power Converters for Energy Conversion: Design, Control and Applications)
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17 pages, 643 KiB  
Article
A Comparator-Less Buck Converter with Fast Transient Response Using a Reactive Ramp Generator
by Young-Kyu Kim, Chung-Hee Jang, Dong-Hyun Shin and Kwang-Hyun Baek
Energies 2025, 18(2), 307; https://doi.org/10.3390/en18020307 - 12 Jan 2025
Viewed by 822
Abstract
This paper introduces a voltage-mode DC-DC buck converter designed to address the challenges of high-frequency operation. The proposed comparator-less Reactive Ramp Generator (RRG) topology mitigates the issues associated with comparator delays, achieving a fast load transient response. By eliminating all comparators from the [...] Read more.
This paper introduces a voltage-mode DC-DC buck converter designed to address the challenges of high-frequency operation. The proposed comparator-less Reactive Ramp Generator (RRG) topology mitigates the issues associated with comparator delays, achieving a fast load transient response. By eliminating all comparators from the buck converter’s control circuit, we prevent potential delay-induced malfunctions, thereby enhancing overall operational reliability. The rapid response of the RRG, enabled by a short feedback loop, allows for swift output voltage regulation during load transients. Replacing comparators in the PWM controller with inverters effectively removes delay issues without adding complexity. Since the proposed design retains the conventional voltage-mode transfer function, standard type-3 compensation is readily applicable. Operating with a 3.3 V input, the buck converter provides an output range from 0.65 V to 3.0 V, achieving a settling time of 0.802 µs for load changes from 200 mA to 1 A, and 1.27 µs for load changes from 1 A to 200 mA. The proposed architecture achieves a peak efficiency of 92.78% at 2.4 V and 600 mA. Full article
(This article belongs to the Special Issue Power Converters for Energy Conversion: Design, Control and Applications)
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19 pages, 6990 KiB  
Article
A Reconfigurable Phase-Shifted Full-Bridge DC–DC Converter with Wide Range Output Voltage
by Jhon Brajhan Benites Quispe, Marcello Mezaroba, Alessandro Luiz Batschauer and Jean Marcos de Souza Ribeiro
Energies 2024, 17(14), 3483; https://doi.org/10.3390/en17143483 - 15 Jul 2024
Cited by 4 | Viewed by 1837
Abstract
This paper analyzes, designs and implements a reconfigurable phase-shifted full-bridge (PSFB) converter. It adopts the topology of the traditional PSFB converter and incorporates clamping circuits to solve some fundamental problems of conventional topology. In addition, auxiliary switches are employed for output reconfiguration, which [...] Read more.
This paper analyzes, designs and implements a reconfigurable phase-shifted full-bridge (PSFB) converter. It adopts the topology of the traditional PSFB converter and incorporates clamping circuits to solve some fundamental problems of conventional topology. In addition, auxiliary switches are employed for output reconfiguration, which allows expanding the output voltage range without compromising the system efficiency. Single pole double throw (SPDT) mechanical switches are used to realize series and parallel connections. In this paper, the characterization of the PSFB converter with clamping circuit and its design considerations are discussed. A 10 kW prototype with a power density of 0.485 W/cm3, 900 V input voltage and 400/800 V nominal output voltage was manufactured. The experimental results validated the analysis and confirmed the high conversion efficiency for a wide load range; an efficiency of 96.69% was obtained for the full load condition. Full article
(This article belongs to the Special Issue Power Converters for Energy Conversion: Design, Control and Applications)
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18 pages, 8837 KiB  
Article
Minimizing Leakage Magnetic Field of Wireless Power Transfer Systems Using Phase Difference Control
by Seongho Woo, Yujun Shin, Changmin Lee, Jaewon Rhee, Jangyong Ahn, Jungick Moon, Seokhyeon Son, Sanguk Lee, Hongseok Kim and Seungyoung Ahn
Energies 2022, 15(21), 8202; https://doi.org/10.3390/en15218202 - 3 Nov 2022
Cited by 8 | Viewed by 2482
Abstract
In this paper, we propose a method to reduce the leakage magnetic field from wireless power transfer (WPT) systems with series–series compensation topology by adjusting the phase difference between the transmitter (TX) coil current and the receiver (RX) coil current without additional shielding [...] Read more.
In this paper, we propose a method to reduce the leakage magnetic field from wireless power transfer (WPT) systems with series–series compensation topology by adjusting the phase difference between the transmitter (TX) coil current and the receiver (RX) coil current without additional shielding coils or materials. A WPT system employing the proposed method adjusts the phase difference between the TX coil current and RX coil current by tuning a resonant capacitor of the RX coil. The conditions for minimizing the leakage magnetic field are derived, and the range of the resonant capacitor of RX, considering power transfer efficiency and the leakage magnetic field, is proposed. Through simulations and experiments, it is verified that the proposed method can reduce the leakage magnetic field level without any additional materials. For that reason, the proposed method can be suitable for size-limited, weight-limited or cost-limited WPT systems. Full article
(This article belongs to the Special Issue Power Converters for Energy Conversion: Design, Control and Applications)
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