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Applied Sciences
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High-Temperature Superconductors and Their Applications
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High-Temperature Superconductors and Their Applications

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Applied Physics General".

Deadline for manuscript submissions: closed (20 August 2023) | Viewed by 3336

Special Issue Editor

Dr. Chao Li

E-Mail Website
Guest Editor
School of Electrical & Information Engineering, Tianjin University, Tianjin 300072, China
Interests: superconducting fault current limiter; wireless energization of superconducting magnets; superconducting magnetic energy storage
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

High-temperature superconductors (HTS) are advanced materials which allow the development of cutting-edge devices and new functionalities. This Special Issue aims to provide a forum for the latest advancements in the research of high-temperature superconductors.

This issue will focus on the achievements of large-scale HTS technological applications, materials and electronics. Topics will range from an individual device to integrated systems, from laboratory investigations to industrial applications. Topics will include, but are not limited to, the following:

  • HTS materials: synthesis and characterization of HTS materials such as HTS tapes, films and bulk.
  • Large-scale HTS applications: conductor, cable, coil and magnets for energy storage, power system, accelerators, high-field facility fusions and other applications.
  • HTS electronics and applications: active and passive devices, sensors and detectors, analog and digital circuits and system development.

Dr. Chao Li
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. Applied Sciences 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.

Published Papers (2 papers)

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Research

17 pages, 4979 KiB  
Article
The Fault Ride-Through Characteristics of a Double-Fed Induction Generator Using a Dynamic Voltage Restorer with Superconducting Magnetic Energy Storage
by Lei Li, Yabo Liang, Jian Niu, Jianan He, Haitao Liu, Bin Li, Chao Li and Yunzhu Cao
Appl. Sci. 2023, 13(14), 8180; https://doi.org/10.3390/app13148180 - 13 Jul 2023
Cited by 1 | Viewed by 1160
Abstract
With the prevalence of renewable energy sources such as wind power in the power system, analyzing the fault characteristics of systems composed of DFIGs is becoming increasingly important. Therefore, this article analyzes, at first theoretically, the fault characteristics of a doubly fed induction [...] Read more.
With the prevalence of renewable energy sources such as wind power in the power system, analyzing the fault characteristics of systems composed of DFIGs is becoming increasingly important. Therefore, this article analyzes, at first theoretically, the fault characteristics of a doubly fed induction generator (DFIG) during fault periods. It was found that the fault current of the DFIG exhibited the frequency offset phenomenon, which is affected by the depth of voltage dips and can negatively impact traditional distance protection. Furthermore, a method using a dynamic voltage restorer (DVR) based on superconducting magnetic energy storage (SMES) was adopted to compensate for the fault voltage of DFIG, which can mitigate the voltage dips of the DFIG. This method can not only achieve the fault ride through for DFIG but also significantly improve the frequency offset of the fault current during fault periods. Finally, a model composed of a 2.5 MW DFIG-based wind turbine and a 2.5 MW DVR-based SMES was built using a real-time digital simulator (RTDS) platform, and the simulation results showed that the fault stator voltage of DFIG can be compensated at a rated value of 0.69 kV, and the frequency of fault current can be maintained at 50 Hz These results validate the excellent performance of the method in achieving the fault ride through of DFIG and improving the frequency offset of the fault current by comparing multiple type faults while employing different protection methods. Full article
(This article belongs to the Special Issue High-Temperature Superconductors and Their Applications)
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15 pages, 5890 KiB  
Article
Electron Beam Characterization of REBCO-Coated Conductors at Cryogenic Conditions
by Michal Haubner, Patrick Krkotić, Catarina Serafim, Valentine Petit, Vincent Baglin, Sergio Calatroni, Bernard Henrist, Artur Romanov, Teresa Puig and Joffre Gutierrez
Appl. Sci. 2023, 13(5), 2765; https://doi.org/10.3390/app13052765 - 21 Feb 2023
Viewed by 1722
Abstract
Particle accelerators with superconducting magnets operating at cryogenic temperatures use a beam screen (BS) liner that extracts heat generated by the circulating bunched charge particle beam before it can reach the magnets. The BS surface, commonly made of high–conductivity copper, provides a low [...] Read more.
Particle accelerators with superconducting magnets operating at cryogenic temperatures use a beam screen (BS) liner that extracts heat generated by the circulating bunched charge particle beam before it can reach the magnets. The BS surface, commonly made of high–conductivity copper, provides a low impedance for beam stability reasons, low secondary electron yield (SEY) to mitigate the electron–cloud (EC) effect, and low electron–stimulated desorption yield (ESD) to limit the dynamic pressure rise due to EC. Rare–earth barium copper oxide (REBCO) high–temperature superconductors (HTSs) recently reached technical maturity, are produced as coated conductor tapes (REBCO–CCs), and will be considered for application in future colliders to decrease the BS impedance and enable operation at around 50 K, consequently relaxing the cryogenic requirements. Aside from HTS properties, industry–grade REBCO–CCs also need qualification for EC and dynamic vacuum compatibility under accelerator–like conditions. Hence, we report the SEY and ESD measured at cryogenic temperatures of 12 K under low–energy electron irradiation of 0–1.4 keV. We also verify the sample compositions and morphologies using the XPS, SEM, and EDS methods. The energy and dose dependencies of ESD are comparable to those of technical–grade metals and one sample reached SEYMAX = 1.2 after electron conditioning. Full article
(This article belongs to the Special Issue High-Temperature Superconductors and Their Applications)
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