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Energies
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Middle Voltage Converters and Smartgrids Applications
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Middle Voltage Converters and Smartgrids Applications

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A1: Smart Grids and Microgrids".

Deadline for manuscript submissions: closed (31 December 2020) | Viewed by 8210

Special Issue Editors

Prof. Dr. Mauro Carpita

E-Mail Website
Guest Editor
Département des Technologies Industrielles (TIN), Haute école Spécialisée de Suisse Occidentale (HES-SO), University of Applied Sciences of Western Switzerland, Route de Cheseaux 1, 1401 Yverdon-les-Bains, Switzerland
Interests: power electronics and smartgrids
Prof. Dr. Seddik Bacha

E-Mail Website
Guest Editor
CNRS, University of Grenoble Alpes, Grenoble INP, G2Elab, F-38000, Grenoble, France
Interests: FACTS; microgrid; renewable energies; HVDCV; ehicle to Grid

Special Issue Information

Dear Colleagues,

Usually, when discussing Smartgrids, the first thought that comes to mind is related to low voltage, AC applications. However, the use of DC power connection electricity grids is now becoming an increasingly popular option in modern smart grids for both high voltage and medium voltage, due to its increased flexibility and easiness of control. Other issues often discussed are the use of Power Electronics transformers, or the use of DC/DC converters as building blocks for medium/high-voltage AC applications. The application of Static Compensators is also becoming more and more important in Smartgrid applications.

For all these kinds of applications, suitable power converter structures must be developed, able to sustain the high voltages required. The modeling, control, and protection issues arising from this are also of great importance.

The topics that must be addressed in this call for papers are the following:

  • Power converter structures for Multiterminal HVDC operations;
  • Multilevel converters’ topologies, modeling, and control;
  • Multilevel converters’ protection issues;
  • Medium-voltage power electronics transformers;
  • High-power DC/DC converters for high-voltage applications;
  • Innovative power converters for medium-voltage Statcom applications;
  • Applications of new power electronics semiconductor switches for medium- and high-voltage utility applications.

Prof. Dr. Mauro Carpita
Prof. Dr. Seddik Bacha
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 converter structures for Multiterminal HVDC operations
  • multilevel converters’ topologies, modeling, and control
  • multilevel converters’ protection issues
  • medium-voltage power electronics transformers
  • high-power DC/DC converters for high-voltage applications
  • innovative power converters for medium-voltage Statcom applications
  • applications of new power electronics semiconductor switches for medium- and high-voltage utility applications.

Published Papers (3 papers)

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Research

18 pages, 3853 KiB  
Article
A Simple Method to Validate Power Loss in Medium Voltage SiC MOSFETs and Schottky Diodes Operating in a Three-Phase Inverter
by Jacek Rąbkowski, Hubert Skoneczny, Rafał Kopacz, Przemysław Trochimiuk and Grzegorz Wrona
Energies 2020, 13(18), 4773; https://doi.org/10.3390/en13184773 - 12 Sep 2020
Cited by 4 | Viewed by 2812
Abstract
This paper presents an original method of power loss validation in medium-voltage SiC MOSFET (metal–oxide–semiconductor field-effect transistor) modules of a three-phase inverter. The base of this method is a correct description of the on-state performance of the diodes and the transistors in a [...] Read more.
This paper presents an original method of power loss validation in medium-voltage SiC MOSFET (metal–oxide–semiconductor field-effect transistor) modules of a three-phase inverter. The base of this method is a correct description of the on-state performance of the diodes and the transistors in a PWM (pulse width modulation)-controlled inverter phase leg. Combined electro-thermal calculations are applied to precisely estimate the losses in the power devices and then, to find the suitable circuit parameters of a test circuit to emulate these conditions. A simple square-wave-controlled half-bridge with an inductive load enables the electrical and thermal stresses comparable to these in the inverter, and moreover, provided equations that confirmed the possibility of balancing the load between the diodes and the transistors. The circuit with 3.3 kV SiC MOSFETs was tested to verify the impact of selected parameters on power losses with the main focus on duty ratio. The same module was applied, in addition to an inductive load (3 × 112 μH) and two sets of DC-link capacitors (750 μF), to validate a phase leg of a 220 kVA inverter. In spite of a significantly apparent power, the active power delivered from the DC supply settled around 1 kW, which was enough to emulate 390 W of losses in two transistors and diodes. Full article
(This article belongs to the Special Issue Middle Voltage Converters and Smartgrids Applications)
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19 pages, 6304 KiB  
Article
Electromagnetic Immunity Performance of Intelligent Electronic Equipment in Smart Substation’s Electromagnetic Environment
by Guanchen Liu, Peng Zhao, Yang Qin, Mingmin Zhao, Zhichao Yang and Henglin Chen
Energies 2020, 13(5), 1130; https://doi.org/10.3390/en13051130 - 03 Mar 2020
Cited by 14 | Viewed by 2676
Abstract
With the gradual increasing of the transmission voltage level, the situation of interference on secondary side equipment in smart substations is becoming more serious. The authors tested the interference waveforms caused by the circuit breaker’s operation at the smart substation, which showed the [...] Read more.
With the gradual increasing of the transmission voltage level, the situation of interference on secondary side equipment in smart substations is becoming more serious. The authors tested the interference waveforms caused by the circuit breaker’s operation at the smart substation, which showed the severity of the electromagnetic (EM) environment. This paper takes the electronic current transformer acquisition card as an example. The influence of EM interference sources on the reliability of the acquisition card is analyzed. Then, standardized electromagnetic compatibility (EMC) immunity tests of the international electrotechnical commission (IEC) for different interferences are implemented. Typical output characteristics of acquisition cards for different tests are analyzed. Innovatively, this paper proposes a quantitative evaluation method of output waveform disturbance to evaluate the acquisition card’s performance. This disturbance distortion is of great significance to the EM environment estimation of the acquisition card. Full article
(This article belongs to the Special Issue Middle Voltage Converters and Smartgrids Applications)
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18 pages, 4284 KiB  
Article
Enhancement on the Fault Ride through Capability of Power Distribution Systems Linked by Distributed Generation due to the Impedance of Superconducting Fault Current Limiters
by Sang-Jae Choi and Sung-Hun Lim
Energies 2019, 12(24), 4810; https://doi.org/10.3390/en12244810 - 17 Dec 2019
Cited by 7 | Viewed by 2247
Abstract
Recently, studies on connecting distributed generation (DG) to power distribution systems through DC links have been actively conducted. When a fault in feeder of this power distribution system occurs, a voltage dip can happen in the grid. In order to prevent voltage dips, [...] Read more.
Recently, studies on connecting distributed generation (DG) to power distribution systems through DC links have been actively conducted. When a fault in feeder of this power distribution system occurs, a voltage dip can happen in the grid. In order to prevent voltage dips, there are several solutions such as the application of a superconducting fault current limiter (SFCL). If a SFCL with a larger impedance is applied, the voltage dip of the grid is effectively prevented. However, this action can bring about the malfunction or the delayed operation of the over-current relay (OCR) due to the decreased fault current, which causes another problem of protection coordination between the protective relays. On the other hand, if the impedance of the SFCL is too low, excessive reactive power is supplied by the fault ride-through (FRT) regulation and the active power is reduced. This causes an active power imbalance on the DC link and increases the DC link’s voltage. As previous solutions to prevent the rise of DC links’ voltage, the deloading method and the application of a chopper resistor have been suggested. In this paper, a technique called active power tracking control (APTC), was proposed to suppress the rise of DC links’ voltage. Case studies considering the impedance of SFCL in the constructed power distribution system were carried out, and the rise of DC links’ voltage could be effectively suppressed without any significant delay in the operation of the OCR. This study is expected to solve both the voltage dip of the grid and the rise of DC links’ voltage when distributed generation is connected to a grid. Full article
(This article belongs to the Special Issue Middle Voltage Converters and Smartgrids Applications)
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