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Power Converters: Modeling, Control, and Applications II
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Power Converters: Modeling, Control, and Applications II

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Energy Science and Technology".

Deadline for manuscript submissions: closed (30 January 2023) | Viewed by 11263

Special Issue Editors

Prof. Dr. Zbigniew Rymarski

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Guest Editor
Department of Electronics, Electrical Engineering and Microelectronics, Faculty of Automatic Control, Electronics and Computer Science, Silesian University of Technology, Akademicka 16, 44-100 Gliwice, Poland
Interests: power electronics; power supply; inverters; control theory in power electronics; uninterruptible power supply
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Pooya Davari

E-Mail Website
Guest Editor
Department of Energy Technology, Aalborg University, Pontoppidanstraede 111, 9220 Aalborg, Denmark
Interests: active front-end rectifiers; harmonic mitigation in adjustable-speed drives; electromagnetic interference in power electronics; high-power-density power electronic systems; pulsed power application
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Zbigniew Kaczmarczyk

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Guest Editor
Faculty of Electrical Engeenering, Department of Power Electronics, Electrical Drives and Robotics, Silesian University of Technology, 44-100 Gliwice, Poland
Interests: power electronics; numerical analysis; resonant power conversion; resonant high-frequency Class E; EF; DE inverters; power MOSFET transistors and their drivers; magnetically coupled circuits; wireless power transfer; induction heating
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The continuous expansion of power electronic system applications are transforming the legacy power system into a pure-power, electronic-based power system. Thus, it is extremely important to use all energy sources in an efficient and environmentally friendly manner. As the generated electrical energy is usually only a semi-finished product, its appropriate adaptation and conversion is required. The conversion, often with several stages, is carried out by power electronic converters, which should have the highest possible efficiency. At the same time, as a consequence of the use of power converters and the nature of certain loads, additional filtering and compensation techniques are applied to ensure the required quality of electrical energy. Progress in the field of technology, available materials and components, new topologies, and advanced methods of analysis, modeling, control, and design have a positive impact on the obtained properties of power converters. This Special Issue aims to provide a platform for researchers to share the latest advances and developments in power converters from modeling, control, and application perspectives. Topics of interest include, but are not limited to:

  • Converters for uninterruptible power supplies;
  • Converters for motor drives;
  • Bidirectional power converters;
  • High-power density converters;
  • High-efficiency converter topologies;
  • Power harmonic filters and power quality;
  • Advanced control and reliability of converters;
  • Modeling and simulation of converters;
  • Electromagnetic compatibility in power converters;
  • Interactions, stability analysis and enhancement of power converters;
  • Modern components (e.g., magnetic materials, wide band-gap power semiconductor devices) in power converters;
  • Renewable energy systems.

Prof. Dr. Zbigniew Rymarski
Prof. Dr. Pooya Davari
Prof. Dr. Zbigniew Kaczmarczyk
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.

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Published Papers (6 papers)

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Editorial

Jump to: Research

3 pages, 195 KiB  
Editorial
Special Issue on Power Converters: Modelling, Control, and Applications
by Zbigniew Rymarski, Pooya Davari and Zbigniew Kaczmarczyk
Appl. Sci. 2023, 13(11), 6565; https://doi.org/10.3390/app13116565 - 28 May 2023
Viewed by 1372
Abstract
It is very important to utilize the available sources of energy efficiently using power electronics devices and to increase the share of renewable energy sources [...] Full article
(This article belongs to the Special Issue Power Converters: Modeling, Control, and Applications II)

Research

Jump to: Editorial

13 pages, 1991 KiB  
Article
Simplified Double-Integral Sliding-Mode Control of PWM DC-AC Converter with Constant Switching Frequency
by Humam Al-Baidhani and Marian K. Kazimierczuk
Appl. Sci. 2022, 12(20), 10312; https://doi.org/10.3390/app122010312 - 13 Oct 2022
Cited by 8 | Viewed by 2274
Abstract
In this paper, a simplified double-integral sliding-mode control method for pulse-width-modulated dc-ac buck conversion is introduced. The control equation is derived based on the equivalent control method, in which the control-oriented model is developed using the averaged dynamics of the power converter in [...] Read more.
In this paper, a simplified double-integral sliding-mode control method for pulse-width-modulated dc-ac buck conversion is introduced. The control equation is derived based on the equivalent control method, in which the control-oriented model is developed using the averaged dynamics of the power converter in continuous conduction mode. In contrast with the conventional sliding-mode control schemes, the complexity of adding a capacitor current sensor, variable ramp voltage, and other relevant components is avoided. Furthermore, the control equation is translated into a simple electronic circuit with minimal added components, which reduces the practical implementation cost. The proposed control method rejects large disturbances, tracks the reference signal, and maintains a constant switching frequency. Systematic design procedure, control parameters selection, and stability conditions are presented. The design methodology is verified via simulating the proposed control circuit using Simscape Electrical in MATLAB. The control method is also compared with the conventional double-integral sliding-mode control scheme under load disturbances. The results show that the simplified control approach provides a fast transient response and robust tracking performance. Full article
(This article belongs to the Special Issue Power Converters: Modeling, Control, and Applications II)
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30 pages, 7506 KiB  
Article
Accurate Efficiency and Power Densities Optimization of Output Inductor of Buck Derived Converters
by Hugot Pichon, Yves Lembeye and Jean-Christophe Crebier
Appl. Sci. 2022, 12(18), 9330; https://doi.org/10.3390/app12189330 - 17 Sep 2022
Cited by 1 | Viewed by 1595
Abstract
In this article, inductor loss models are developed based on the experimental characterization of off-the-shelf components. The modelling steps and techniques are described and validated. It is shown that the model exhibits fairly good accuracy over a large range of ripple current frequency [...] Read more.
In this article, inductor loss models are developed based on the experimental characterization of off-the-shelf components. The modelling steps and techniques are described and validated. It is shown that the model exhibits fairly good accuracy over a large range of ripple current frequency and magnitude. Then, these models are used, as an illustration, in order to present the possible optimization process of the tradeoff between switching frequency-current ripple magnitude and output inductors value in the case of a Buck-derived converter. This optimization has shown that a large current ripple may lead to minimized losses in some cases. The developed modelling technique aims to represent Joules and iron losses, as well as DC and AC losses of inductors. It is not based on physical behaviour description but on mathematical equations based on a set of experimental characterizations. The modelling technique is not suitable for designing the component itself but is useful for selecting the best component value in the manufacturer’s series of components. Since it remains difficult with the manufacturer datasheet to estimate AC losses accurately with respect to frequency and ripple current magnitude, a specific characterization is carried out to complement the available data. Full article
(This article belongs to the Special Issue Power Converters: Modeling, Control, and Applications II)
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15 pages, 3973 KiB  
Article
Fast Method of Computations of Ripples in the Junction Temperature of Discrete Power SiC-MOSFETs at the Steady State
by Krzysztof Górecki and Paweł Górecki
Appl. Sci. 2022, 12(17), 8887; https://doi.org/10.3390/app12178887 - 5 Sep 2022
Cited by 3 | Viewed by 1544
Abstract
This paper presents a method of fast computations of waveforms of the junction temperature of power SiC-MOSFETs (silicon carbide metal–oxide–semiconductor field-effect transistor) operating in switched-mode circuits at the steady state. This method makes it possible to use SPICE (Simulation Program with Integrated Circuits [...] Read more.
This paper presents a method of fast computations of waveforms of the junction temperature of power SiC-MOSFETs (silicon carbide metal–oxide–semiconductor field-effect transistor) operating in switched-mode circuits at the steady state. This method makes it possible to use SPICE (Simulation Program with Integrated Circuits Emphasis) models of the considered transistors given by the manufacturers. The method of the analysis is described. Using the presented methods and a compact thermal model, some computations of switch-mode circuits were performed. Typical switches and DC–DC (direct current to direct current) boost converters, including such transistors operating at different cooling conditions in a wide range of frequencies of a control signal, are analyzed. In particular, the influence of the cooling system, load resistance and switching frequency on the waveforms of the dissipated power and the junction temperature are considered. The obtained results of computations are compared with the results found using other methods of analysis given in the literature. The times required to perform computations with the considered methods are compared. On the basis of the results of the performed analyses, the operating conditions of the investigated networks, at which ripples of the junction temperature are important, are pointed out. A short discussion on the limitation of the lifetime of the power MOSFET is also given. Full article
(This article belongs to the Special Issue Power Converters: Modeling, Control, and Applications II)
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21 pages, 6033 KiB  
Article
A Probabilistic Framework for the Robust Stability and Performance Analysis of Grid-Tied Voltage Source Converters
by Hosein Gholami-Khesht, Pooya Davari, Mateja Novak and Frede Blaabjerg
Appl. Sci. 2022, 12(15), 7375; https://doi.org/10.3390/app12157375 - 22 Jul 2022
Cited by 4 | Viewed by 1511
Abstract
This paper proposed a probabilistic framework that could be used for the sensitivity assessment of grid-connected voltage source converters (VSCs), where uncertainties in the grid short circuit ratio (SCR) and operating point conditions, as well as control-loop interactions, were considered. The proposed method [...] Read more.
This paper proposed a probabilistic framework that could be used for the sensitivity assessment of grid-connected voltage source converters (VSCs), where uncertainties in the grid short circuit ratio (SCR) and operating point conditions, as well as control-loop interactions, were considered. The proposed method tried to broaden the available knowledge on the small-signal stability analysis of VSCs and provide a probabilistic point of view of this subject. It considered the probability of different operational conditions in order to obtain less conservatism and more accurate results. Based on uncertain inputs and the employed stability model, the proposed model produced statistical distributions of the critical mode and its damping factor and ratio, which were not accessible by existing deterministic methods. Crucial statistical information measures how much system stability and performance are maintained or changed over the system uncertainties and disturbances, as well as provides a clear insight into the system stability problem. For instance, as concluded in this paper, for the conventional control system design, fast dynamic parts of a VSC, such as the current controller and control delay, significantly impact the minimum damping ratio. Furthermore, slow dynamic parts, such as outer voltage control loops and the synchronization block, influence the maximum damping factor. For strong grids, the AC voltage magnitude controller (AVC) significantly impacts the maximum damping factor due to its lower bandwidth among all control loops. For weak grids, the damping factor of the critical mode is highly affected by interactions between the VSC, the power grid, and different control loops due to the synchronization mechanism. The other contributions of this paper were the introduction of robust stability and performance definitions and indices; explanations of the pros and cons of probabilistic assessment methods and their applicability; interpretation of the obtained results; and, finally, a link was provided between system stability and reliability, which will be crucial for future power system design. Full article
(This article belongs to the Special Issue Power Converters: Modeling, Control, and Applications II)
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17 pages, 8113 KiB  
Article
Influence of Random Modulated Power Converter on G3 Power Line Communication
by Abduselam Hamid Beshir, Waseem El Sayed, Lu Wan, Flavia Grassi, Paolo Stefano Crovetti, Xiaokang Liu, Xinglong Wu, Amr Madi, Robert Smolenski and Sergio Amedeo Pignari
Appl. Sci. 2022, 12(11), 5550; https://doi.org/10.3390/app12115550 - 30 May 2022
Cited by 4 | Viewed by 1951
Abstract
Power Line Communication (PLC) technologies are being used in many applications and offer the advantage of utilizing existing power cables for both power and data transmission, thus minimizing cost and complexity. Nevertheless, PLC technology requires further investigation to solve possible co-existence issues. Indeed, [...] Read more.
Power Line Communication (PLC) technologies are being used in many applications and offer the advantage of utilizing existing power cables for both power and data transmission, thus minimizing cost and complexity. Nevertheless, PLC technology requires further investigation to solve possible co-existence issues. Indeed, recent studies confirmed that alternative modulation schemes such as Random Pulse Width Modulation (RPWM), applied to switching-mode power converters to minimize conducted emissions, detrimentally interfere with the PLC system. This paper presents an experimental test campaign aimed at investigating the effects of RPWM on the G3-PLC system, with the final goal of understanding the conditions under which RPWM schemes can be considered as an effective alternative to conventional Pulse Width Modulation (PWM) in applications involving PLC systems. In details, the effects of different RPWM parameters such as switching frequency, modulation index, and Random Number Update Rate (RNUR) on the G3-PLC is investigated. In addition, different RPWM schemes such as Random Frequency Modulation (RFM) and Random Pulse Position Modulation (RPPM) are compared in terms of performance so as to highlight which RPWM is best suited to assure coexistence with PLC systems. The impact of RPWM on the communication channel is evaluated in terms of Frame Error Rate (FER), Channel Capacity, and Channel Capacity Loss metrics. Experimental results confirmed that randomly modulated converters with switching frequencies near the G3-PLC bandwidth cause more significant disturbance and possible coexistence issues than the switching frequencies out of this range. Results also show that the modulation index and the RNUR of RPWM have a direct effect on the communication channel. Moreover, a trade-off between Electromagnetic Interference (EMI) reduction and coexistence issues is observed: RFM, which is very effective for EMI reduction, is found to be very disruptive for G3-PLC, compared to alternative random modulation techniques such as RPPM. Full article
(This article belongs to the Special Issue Power Converters: Modeling, Control, and Applications II)
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