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Energies
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Dynamic Modelling and Control in Multilevel Converters
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Dynamic Modelling and Control in Multilevel Converters

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

Deadline for manuscript submissions: closed (20 October 2022) | Viewed by 11234

Special Issue Editors

Prof. Dr. Francisco Gordillo

E-Mail Website
Guest Editor
Departamento de Ingeniería de Sistemas y Automática, University of Seville, Sevilla, Spain
Interests: control system synthesis; voltage control; machine control; power control; power convertors; power grids; rectifying circuits; switching convertors; AC–DC power convertors; DC–AC power convertors; DC–DC power convertors; Lyapunov methods; asymptotic stability; bridge circuits; capacitors; cascade networks; discrete-time systems; electric current control; linear quadratic control; maximum power point trackers; photovoltaic power systems; power capacitors; power generation control; power system control; rectifiers
Prof. Dr. Francisco Salas Gómez

E-Mail Website
Guest Editor
Escuela Técnica Superior de Ingenierí, Universidad de Sevilla, Seville, Spain
Interests: control system synthesis; nonlinear control systems; PI control; adaptive control; closed-loop systems; differential algebraic equations; electric current control; integer programming; linear programming; machine control; manipulator dynamics; observers; position control; power control; rectifiers; rectifying circuits; robust control; stability; state feedback; switching convertors; table lookup; tracking; voltage control; voltage-source convertors; bifurcation

Special Issue Information

Dear Colleagues,

We are inviting submissions to a Special Issue of Energies on the subject area of "Dynamic Modelling and Control in Multilevel Converters".

Multilevel converters are used in various industrial, commercial, and domestic applications, such as grid-connected systems, HVDC transmission lines, active power filters, UPS, electrical drives, renewable power systems, etc. The efforts of researchers and industry has led to rapid and continual development in this field, which resulting in a wide variety of multilevel converter topologies, modulation techniques, and control strategies that enhance power quality, improve efficiency, and gains versatility. Despite this, there is still plenty of room for new improvements and proposals, as the control of such converters can be tackled from different perspectives aimed at different applications.

This Special Issue covers different aspects related to the design of control systems for multilevel converters, such as: modelling approaches, controller design, modulation techniques, fault-tolerant control, and performance analysis. The topics of interest include, but are not limited to:

  • Modelling and control issues for new topologies of multilevel converters;
  • New modulation strategies for multilevel converters;
  • Stability analysis of multilevel converters;
  • Fault-tolerant capability of multilevel converters and associated control methods;
  • Control design and implementation issues for high-efficiency multilevel converters;
  • Control techniques for grid-connected multilevel converters: issues and performance when connected to microgrids, weak grids, or working in islanded mode;
  • Control approaches for medium- and high-voltage applications;
  • Control, dynamics, and performance of multilevel converters in selected applications: aircraft, marine, space, electric vehicles, transmission lines, etc.
Prof. Dr. Francisco Gordillo
Prof. Dr. Francisco Salas Gómez
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

  • multilevel converters
  • modulation techniques
  • control methods
  • medium- and high-power systems
  • renewable energy sources
  • dynamic analysis and control

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Published Papers (4 papers)

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Research

17 pages, 6612 KiB  
Article
Design of a Repetitive Control for a Three-Phase Grid-Tied Converter under Distorted Grid Voltage Conditions
by Andrzej Straś, Bartłomiej Ufnalski and Arkadiusz Kaszewski
Energies 2023, 16(2), 754; https://doi.org/10.3390/en16020754 - 9 Jan 2023
Cited by 1 | Viewed by 1955
Abstract
The paper presents a design of repetitive control (RC) in the current control system of a three-phase grid-tied converter. The goal of the control system is to provide sinusoidal input filter currents under the conditions of distorted and asymmetrical grid voltage. A novel [...] Read more.
The paper presents a design of repetitive control (RC) in the current control system of a three-phase grid-tied converter. The goal of the control system is to provide sinusoidal input filter currents under the conditions of distorted and asymmetrical grid voltage. A novel design of the RC is presented, in which the repetitive part is not excited by sharp and non-periodic changes of the reference signal, but it enables high-quality performance under periodic disturbance conditions. In the proposed system. RC cooperates with a discrete state feedback controller. An innovative approach to tuning is proposed in which parameters of the repetitive, as well as the state feedback controller, are selected as a result of the optimization process with the use of a particle swarm algorithm. The proposed control system is verified experimentally on a laboratory test bench. The achieved results confirm the high-quality system performance. Full article
(This article belongs to the Special Issue Dynamic Modelling and Control in Multilevel Converters)
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14 pages, 4363 KiB  
Article
Sequential Capacitor-Based Closed-Loop Precharge Control during the Single-Phase MMC Start-Up Process
by Walid Ahmed Maher Ghoneim and Ahmed Alaa Aziz
Energies 2021, 14(16), 4840; https://doi.org/10.3390/en14164840 - 9 Aug 2021
Viewed by 2632
Abstract
Modularity, flexible scalability, and high efficiency are some of the aspects that have paved the way toward the modular multilevel converter (MMC) being regarded as one of the most encouraging converter technologies for medium-/high-power applications; however, the precharging process of all the distributed [...] Read more.
Modularity, flexible scalability, and high efficiency are some of the aspects that have paved the way toward the modular multilevel converter (MMC) being regarded as one of the most encouraging converter technologies for medium-/high-power applications; however, the precharging process of all the distributed submodules’ capacitors during the MMC’s start-up is considered to be a very challenging technical problem, which has been the center of attention since the emergence of the MMC back in 2002. In this paper, a new start-up method based on the sequential capacitors’ charging method is introduced for precharging the single-phase MMC from the DC grid while drastically reducing the charging (start-up) time. A detailed design algorithm for the proposed start-up method is presented. The findings of the simulation of the proposed method are provided to illustrate the capability of the suggested method. Full article
(This article belongs to the Special Issue Dynamic Modelling and Control in Multilevel Converters)
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17 pages, 11864 KiB  
Article
A Novel Control Approach to Hybrid Multilevel Inverter for High-Power Applications
by Muhammad Ali, Ghulam Hafeez, Ajmal Farooq, Zeeshan Shafiq, Faheem Ali, Muhammad Usman and Lucian Mihet-Popa
Energies 2021, 14(15), 4563; https://doi.org/10.3390/en14154563 - 28 Jul 2021
Cited by 6 | Viewed by 2469
Abstract
This paper proposes a hybrid control scheme for a newly devised hybrid multilevel inverter (HMLI) topology. The circuit configuration of HMLI is comprised of a cascaded converter module (CCM), connected in series with an H-bridge converter. Initially, a finite set model predictive control [...] Read more.
This paper proposes a hybrid control scheme for a newly devised hybrid multilevel inverter (HMLI) topology. The circuit configuration of HMLI is comprised of a cascaded converter module (CCM), connected in series with an H-bridge converter. Initially, a finite set model predictive control (FS-MPC) is adopted as a control scheme, and theoretical analysis is carried out in MATLAB/Simulink. Later, in the real-time implementation of the HMLI topology, a hybrid control scheme which is a variant of the FS-MPC method has been proposed. The proposed control method is computationally efficient and therefore has been employed to the HMLI topology to mitigate the high-frequency switching limitation of the conventional MPC. Moreover, a comparative analysis is carried to illustrate the advantages of the proposed work that includes low switching losses, higher efficiency, and improved total harmonic distortion (THD) in output current. The inverter topology and stability of the proposed control method have been validated through simulation results in MATLAB/Simulink environment. Experimental results via low-voltage laboratory prototype have been added and compared to realize the study in practice. Full article
(This article belongs to the Special Issue Dynamic Modelling and Control in Multilevel Converters)
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25 pages, 10447 KiB  
Article
A Novel Cascaded Multilevel Converter Topology Based on Three-Phase Cells—CHB-SDC
by Renner Sartório Camargo, Daniel Santamargarita Mayor, Alvar Mayor Miguel, Emilio José Bueno and Lucas Frizera Encarnação
Energies 2020, 13(18), 4789; https://doi.org/10.3390/en13184789 - 14 Sep 2020
Cited by 9 | Viewed by 2879
Abstract
This paper proposes a new cascaded multilevel converter topology based on three-phase H bridge cells with a common DC-link structure. The proposed multilevel converter topology main advantages, compared with literature renowned multilevel converters topologies, are discussed in the paper, such as modularity, construction, [...] Read more.
This paper proposes a new cascaded multilevel converter topology based on three-phase H bridge cells with a common DC-link structure. The proposed multilevel converter topology main advantages, compared with literature renowned multilevel converters topologies, are discussed in the paper, such as modularity, construction, implementation cost, and DC voltage ripple mitigation. Despite presenting an elementary structure and easy implementation, the use of classic PWM switching strategies is not feasible for this topology, causing the appearance of several short-circuit states between its capacitors. Thus, a graph theory algorithm combined with a model predictive control is also proposed in this work to identify and avoid the new cascaded multilevel converter short-circuit switching states and, concomitantly, guaranteeing the converter output power quality. In order to validate the presented topology applicability, a low voltage synchronous static compensators (STATCOM) with an optimal switching vector model predictive control (OSV-MPC) is implemented in a hardware-in-the-loop platform. The real-time experimental results prove the proposed multilevel topology and the OSV-MPC control strategy effectiveness. Full article
(This article belongs to the Special Issue Dynamic Modelling and Control in Multilevel Converters)
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