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Electronics
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Multi-level Power Converters Systems
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Multi-level Power Converters Systems

A special issue of Electronics (ISSN 2079-9292). This special issue belongs to the section "Power Electronics".

Deadline for manuscript submissions: closed (15 November 2024) | Viewed by 6296

Special Issue Editor

Dr. Luis Vaccaro

E-Mail Website
Guest Editor
Department of Electrical, Electronic, Telecommunication Engineering, and Naval Architecture, University of Genoa, 16126 Genova, Italy
Interests: HVDC; STATCOM; multilevel converters; predictive control; hybrid electric vehicles; renewable energies
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Multilevel converters have been developed since the 80s, with the neutral point clamped inverter by A. Nabae, I. Takahashi, and H. Akagi, the flying capacitor inverter by T.Meynard and H.Foch and the cascade H-bridge inverter by M. Marchesoni. These converters are well suited for medium-voltage applications, but it is not possible to use them in high-voltage (HV) settings.

The modular multilevel converter was developed in 2002 by Rainer Marquardt, allowing the use of voltage source converters for first time in HV applications, e.g., for HVDC converters.

Recently, a new family of multiplexed multilevel converters was introduced by T.Meynard, demonstrating how it is still possible to find new topologies in this field.

This Special Issue aims to report the latest progress in the development of multi-level power converter systems. Topics of interest include, but are not limited to:

  • New multi-level power converters topologies;
  • Advanced modulating techniques;
  • Advanced voltage capacitor balancing strategies;
  • New applications of multi-level power converters;
  • Renewable energy applications;
  • Battery applications;
  • High-power applications.

Dr. Luis Vaccaro
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. Electronics 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 2400 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

  • renewables
  • multilevel converter
  • hybrid converter

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Published Papers (4 papers)

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Research

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21 pages, 7986 KiB  
Article
DC-Link Voltage Fluctuation Suppression Method for Modular Multilevel Converter Based on Common-Mode Voltage and Circulating Current Coupling Injection under Unbalanced Grid Voltage
by Xiaobing Niu, Runze Qiu, Shenglin Liu and Xin Chow
Electronics 2024, 13(17), 3379; https://doi.org/10.3390/electronics13173379 - 26 Aug 2024
Cited by 2 | Viewed by 988
Abstract
Grid voltage imbalance conditions often occur. Modular multilevel rectifiers (MMCs) have high DC-link voltage fluctuation under an unbalanced grid, which affects the normal operation of DC-side equipment. To suppress voltage fluctuation under an unbalanced grid, a coupling injection strategy composed of third zero-sequence [...] Read more.
Grid voltage imbalance conditions often occur. Modular multilevel rectifiers (MMCs) have high DC-link voltage fluctuation under an unbalanced grid, which affects the normal operation of DC-side equipment. To suppress voltage fluctuation under an unbalanced grid, a coupling injection strategy composed of third zero-sequence common-mode voltage (TZCV) and secondary circulating current (SCC) was designed in this paper. In this paper, we calculated the coupling time-domain expression of the TZCV and SCC under an unbalanced grid voltage. Then, the influence of an SCC and TZCV coupling injection on DC-link voltage fluctuation was analyzed. The converter power flow of different system control objectives under an unbalanced grid was calculated, and the overall control method of the converter based on the arm current was proposed. The advantage of the method proposed in this paper is that it can realize online control under different grid voltages and input power conditions in real time and effectively suppress DC-link voltage fluctuation. The simulation was carried out on the MATLAB/Simulink platform, and a hardware-in-the-loop experimental platform was built; the results verify the effectiveness of the proposed strategy. Full article
(This article belongs to the Special Issue Multi-level Power Converters Systems)
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20 pages, 8688 KiB  
Article
Continuous Time Simulation and System-Level Model of a MVDC Distribution Grid Including SST and MMC-Based AFE
by Daniel Siemaszko and Mauro Carpita
Electronics 2024, 13(11), 2193; https://doi.org/10.3390/electronics13112193 - 4 Jun 2024
Cited by 2 | Viewed by 1215
Abstract
Medium-voltage DC (MVDC) technology has gained increasing attention in recent years. Power electronics devices dominate these grids. Accurate simulation of such a grid, with detailed models of switching semiconductors, can quickly became very time-consuming, according to the number of connected devices to be [...] Read more.
Medium-voltage DC (MVDC) technology has gained increasing attention in recent years. Power electronics devices dominate these grids. Accurate simulation of such a grid, with detailed models of switching semiconductors, can quickly became very time-consuming, according to the number of connected devices to be simulated. A simulation approach based on interactions on a continuous time model can be very interesting, especially for developing a system-level control model of such a modern MVDC distribution grid. The aim of this paper is to present all the steps required for obtaining a continuous time modelling of a +/−10 kV MVDC grid case study, including a solid-state transformer (SST)- and modular multilevel converter (MMC)-based active front end (AFE). An additional aim of this paper is to supply educational content about the use of the continuous time simulation approach, thanks to a detailed description of the various devices modelled into the presented MVDC grid. The results of a certain number of simulation scenarios are eventually presented. Full article
(This article belongs to the Special Issue Multi-level Power Converters Systems)
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Review

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21 pages, 4859 KiB  
Review
Advances and Perspectives in Multilevel Converters: A Comprehensive Review
by Alessandro Benevieri, Simone Cosso, Andrea Formentini, Mario Marchesoni, Massimiliano Passalacqua and Luis Vaccaro
Electronics 2024, 13(23), 4736; https://doi.org/10.3390/electronics13234736 - 29 Nov 2024
Viewed by 1841
Abstract
In contemporary power electronics, multilevel converters stand at the forefront of high-power, high-voltage applications, offering superior performance in terms of efficiency, reduced harmonics, and improved voltage waveform quality compared to traditional two-level converters. Their capability to synthesize waveforms with multiple voltage levels has [...] Read more.
In contemporary power electronics, multilevel converters stand at the forefront of high-power, high-voltage applications, offering superior performance in terms of efficiency, reduced harmonics, and improved voltage waveform quality compared to traditional two-level converters. Their capability to synthesize waveforms with multiple voltage levels has garnered significant attention across various industrial sectors, including renewable energy systems, electric vehicles, and high-voltage power transmissions. This paper provides a comprehensive overview of multilevel converter technology, encompassing their classification, main topologies, recent advancements, and emerging trends. By exploring the evolution of multilevel converter technology and identifying future research directions, researchers and engineers can gain valuable insights into the design, optimization, and application of these advanced power electronic systems. Full article
(This article belongs to the Special Issue Multi-level Power Converters Systems)
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Other

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12 pages, 15242 KiB  
Technical Note
Inherently Decoupled Dc-Link Capacitor Voltage Control of Multilevel Neutral-Point-Clamped Converters
by Gabriel Garcia-Rojas, Sergio Busquets-Monge, Robert Griñó and José M. Campos-Salazar
Electronics 2024, 13(13), 2671; https://doi.org/10.3390/electronics13132671 - 7 Jul 2024
Viewed by 1419
Abstract
This letter derives and discusses the superiority of a simple dc-link capacitor voltage control configuration for multilevel neutral-point-clamped converters with any number of levels. The control involves n − 2 control loops regulating the difference between the voltage of neighbor capacitors. These control [...] Read more.
This letter derives and discusses the superiority of a simple dc-link capacitor voltage control configuration for multilevel neutral-point-clamped converters with any number of levels. The control involves n − 2 control loops regulating the difference between the voltage of neighbor capacitors. These control loops are inherently decoupled, i.e., they are independent and the control action of one loop does not affect the others. This method is proven to be equivalent to previously published approaches, with the added advantages of increased simplicity and scalability to a higher number of levels, all while imposing a lower computational burden. The good performance of such control is confirmed through simulations and experiments. Full article
(This article belongs to the Special Issue Multi-level Power Converters Systems)
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