IEEE Transactions on Applied Superconductivity最新文献_第4页

Enhanced Model for Non-Insulated HTS Coils

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-03-03 DOI: 10.1109/TASC.2025.3546873

Stefano Sorti;Lorenzo Balconi;Gabriele Crespi;Lucio Rossi;Carlo Santini;Marco Statera

{"title":"Enhanced Model for Non-Insulated HTS Coils","authors":"Stefano Sorti;Lorenzo Balconi;Gabriele Crespi;Lucio Rossi;Carlo Santini;Marco Statera","doi":"10.1109/TASC.2025.3546873","DOIUrl":"https://doi.org/10.1109/TASC.2025.3546873","url":null,"abstract":"This paper addresses the topic of modelling 2 G HTS tapes and coils, especially (but not limited to) Non-Insulated (NI) devices. We propose a novel 3D electromagnetic Volume Integral Formulation (VIM) for homogenized coils. This model combines the flexibility of distributed circuit models with the numerical approach of Finite Element Methods (FEM). It offers some distinctive features if compared to already available integral formulations (such as Partial Element Equivalent Circuit): first, it describes the current vector potential <bold>T with quadratic shape functions, resulting in non-constant current densities <bold>J inside mesh elements. Secondly, it allows for homogenization of coil turns, together with arbitrarily curved geometries. The results of the model are verified against a COMSOL simulation. The discussion of the model includes also a fast current-sharing calculation in case of overcurrent, with the aim of providing comprehensive heat losses, to then feed thermal models. This work can contribute in better describing and understanding the behavior of NI coils under most operative conditions, expanding the capability of testing and diagnosing these devices.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental Validation of a Scaling Law for the Critical Current of Commercial REBCO Tapes as a Function of Magnetic Field and Temperature

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-02-28 DOI: 10.1109/TASC.2025.3543797

G. Succi;A. Ballarino;S. C. Hopkins;Y. Yang

{"title":"Experimental Validation of a Scaling Law for the Critical Current of Commercial REBCO Tapes as a Function of Magnetic Field and Temperature","authors":"G. Succi;A. Ballarino;S. C. Hopkins;Y. Yang","doi":"10.1109/TASC.2025.3543797","DOIUrl":"https://doi.org/10.1109/TASC.2025.3543797","url":null,"abstract":"Much information is lacking at present on the electrical properties of commercial REBCO tapes. This work, which builds on a previous paper of the same authors, presents the results of an experimental campaign aimed at deriving the critical current of tapes from SuperPower, Fujikura, Faraday Factory, and Shanghai Superconductor Technology. The campaign was conducted by applying both the transport method at 4.2 K, in perpendicular background magnetic fields of up to 15 T, and the magnetization method from 4.2 K up to the critical temperature in fields of up to 10 T. This latter method was adopted to determining the so-called crossover field, <inline-formula><tex-math>${{B}_0}$</tex-math></inline-formula>, at which the transition from single vortex pinning to collective pinning takes place. <inline-formula><tex-math>${{B}_0}$</tex-math></inline-formula> is challenging to determine by the transport method because of the high currents involved (at 4.2 K, <inline-formula><tex-math>${{B}_0}$</tex-math></inline-formula> is roughly 1 T, which corresponds to currents above 1500 A, for a 4 mm tape). Magnetization measurements corroborate transport measurements at 4.2 K both below <inline-formula><tex-math>${{B}_0}$</tex-math></inline-formula> and up to 10 T. Further magnetization measurements above 4.2 K allow the temperature dependence of the scaling parameters to be derived, for correlation with the methodology of flux pinning enhancement by different manufacturers. This provides insights about the effectiveness and interplay of pinning mechanisms.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-9"},"PeriodicalIF":1.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Bending Performance Study of Bridge-Type Butt Joint of REBCO Tapes

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-02-28 DOI: 10.1109/TASC.2025.3546931

Jingli Cao;Menglin Wang;Yatian Pei;Qingyuan Li;Ling Zhao;Qingjin Xu;Min Zhang;Hui Yang;Feipeng Ning

{"title":"The Bending Performance Study of Bridge-Type Butt Joint of REBCO Tapes","authors":"Jingli Cao;Menglin Wang;Yatian Pei;Qingyuan Li;Ling Zhao;Qingjin Xu;Min Zhang;Hui Yang;Feipeng Ning","doi":"10.1109/TASC.2025.3546931","DOIUrl":"https://doi.org/10.1109/TASC.2025.3546931","url":null,"abstract":"To meet the magnetic field design requirements of a new detector for the Circular Electron Positron Collider, a novel aluminum-stabilized stacked rare-earth barium copper oxide (REBCO) tape cable has been proposed and developed. Bridge-type butt joints are utilized to interconnect the REBCO tapes within the cable for the production of kilometer-scale cables. In this investigation, bridge-type butt joints of the REBCO tape were fabricated using soldering techniques, and their bending performance under various bending diameters at 77 K and self-field conditions was examined through finite-element analysis and bending tests. The simulation and experimental results showed a gradual degradation in the critical current (<italic>Ic) of the bridge-type butt joint under bending strain. Enhanced bending performance was achieved by positioning the joint gap at the lower side and increasing the gap between joints. When the gap distance is 10 mm, the critical bending radius threshold may lie between 25 and 20 mm. Finite-element analysis revealed a notable degradation in <italic>Ic when the equivalent strain surpassed 0.4%, indicating uneven stress distribution during bending, leading to localized areas experiencing elevated stress levels that could result in potential damage and degradation.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 3","pages":"1-8"},"PeriodicalIF":1.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Length-Resolved Measurement of Radiation Induced Attenuation in Quench Detection Optical Fibers With Photobleaching

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-02-27 DOI: 10.1109/TASC.2025.3543808

Owen Duke;Joseph Desroches;Erica Salazar

{"title":"Length-Resolved Measurement of Radiation Induced Attenuation in Quench Detection Optical Fibers With Photobleaching","authors":"Owen Duke;Joseph Desroches;Erica Salazar","doi":"10.1109/TASC.2025.3543808","DOIUrl":"https://doi.org/10.1109/TASC.2025.3543808","url":null,"abstract":"Fiber-optic temperature and strain measurement systems are a promising technology for quench detection in insulated HTS magnets because of their compact form factor, immunity to electromagnetic noise, and fully dielectric construction. (Salazar et al. 2021) One of the key challenges to implementing these technologies in magnets for fusion devices is that ionizing radiation causes severe attenuation in the quench detection fibers. This attenuation is exacerbated by the low operating temperatures of HTS magnets (<inline-formula><tex-math>$sim$</tex-math></inline-formula> 20 K) and the long fiber lengths required for quench detection in power-plant scale magnetic confinement fusion systems (<inline-formula><tex-math>$sim$</tex-math></inline-formula> 200 m). (Blanc et al. 2017) In a previous paper we demonstrated that the survivable dose of a quench detection system operating at 1550 nm can be extended by more than 2,000x through continuous photobleaching at 970 nm. (Duke et al. 2024) Here we present an experiment investigating the effect of 970 nm photobleaching on fibers of significant length (up to 250 m) irradiated at 77 K with RIA near 1550 nm monitored using a novel length-resolved measurement technique.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-4"},"PeriodicalIF":1.7,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143735460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis on Arcing Reduction due to Driving Operation of Induction Motor through Application of SFCL in a Power Distribution System

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-02-27 DOI: 10.1109/TASC.2025.3540996

Seung-Su Choi;Min-Ho Yoon;Chan-Muk Park;Sung-Hun Lim

{"title":"Analysis on Arcing Reduction due to Driving Operation of Induction Motor through Application of SFCL in a Power Distribution System","authors":"Seung-Su Choi;Min-Ho Yoon;Chan-Muk Park;Sung-Hun Lim","doi":"10.1109/TASC.2025.3540996","DOIUrl":"https://doi.org/10.1109/TASC.2025.3540996","url":null,"abstract":"The induction motor is used as the wind turbine in a power distribution system, which is one of the renewable energy supplies. Renewable energy has been an alternative to satisfy the increasing power demand. However, the induction motor causes the arc due to the power line issues and the fault occurrences. The arc generation leads to the problem of the power supply to the system and large blackout. Arc current contains a lot of harmonic components, and the harmonic component of arc current in induction motors cause problems such as voltage waveform distortion, efficiency reduction, and power factor reduction. In this article, to protect the induction motor, the application of the superconducting fault current limiter (SFCL) using high temperature superconducting (HTSC) module was proposed and the arc current limiting operation at various locations of the arc experiments were performed. The arc characteristics are different according to the driving method of the induction motor. Also, frequency analysis of arc current was performed using fast Fourier transform (FFT) to analyze the harmonic component. Since the harmonic component also decreases as the arc current reduction, problems caused by the harmonic component can be reduced.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancement of Protection Coordination Between OCR and UVR in Power Distribution System According to Application of SFCL and Induction Generator

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-02-27 DOI: 10.1109/TASC.2025.3540981

Su-Hyeon Kim;Seung-Su Choi;Hak-Goon Kim;Sung-Hun Lim

{"title":"Enhancement of Protection Coordination Between OCR and UVR in Power Distribution System According to Application of SFCL and Induction Generator","authors":"Su-Hyeon Kim;Seung-Su Choi;Hak-Goon Kim;Sung-Hun Lim","doi":"10.1109/TASC.2025.3540981","DOIUrl":"https://doi.org/10.1109/TASC.2025.3540981","url":null,"abstract":"In modern power distribution systems, particularly in South Korea, where 154 kV substations supply multiple feeders, faults on a single feeder can cause voltage drops that affect other feeders connected to the same bus. These voltage drops pose significant risks to feeders with sensitive loads, such as semiconductor fabs, which are vulnerable to voltage sags, resulting in productivity and economic losses. To mitigate these issues, Under Voltage Relay (UVR) is used to protect sensitive loads during faults. However, coordinating the operation of UVR on sound feeders with Over Current Relay (OCR) on the faulted feeder is challenging, especially with the application of Superconducting Fault Current Limiter (SFCL) and Induction Generator (IG). This paper studies on protection coordination enhancement between definite-time UVR and inverse-time OCR in power distribution system according to the application of SFCL and IG. Experimental results showed that applying SFCL and IG can cause OCR's delayed operations and malfunctions in UVR. Therefore, this research adjusted the appropriate pickup values to resolve these issues. The analyses reveal that adjusting pickup values can enhance protection coordination between OCR and UVR. Also the results show that when both SFCL and IG are applied to the faulted feeder, the range of adjustable OCR pickup values is wider than when only SFCL is applied, leading to further improved protection coordination.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-7"},"PeriodicalIF":1.7,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

SQUID Arrays in the Corbino Geometry

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-02-27 DOI: 10.1109/TASC.2025.3546555

Benjamin J. Taylor;Nicholas B. Ferrante;Sean T. Crowe;Ripan Barua;Susan A. E. Berggren

引用次数: 0

Experimental Study on Controlling Contact Resistance in HTS Coils by Adjusting the Amount of PEC

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-02-26 DOI: 10.1109/TASC.2025.3546188

Hongmin Yang;Wooseung Lee;Jae Young Jang;Uijin Jeong;SangGap Lee

引用次数: 0

IEEE Foundation: We Gave Today to Inspire a Brighter Tomorrow

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-02-25 DOI: 10.1109/TASC.2025.3541463

引用次数: 0

Exploring Operation Limits of JT-60SA Cryomagnet Operation: Integrated Commissioning Database Use for Modeling Analysis

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-02-25 DOI: 10.1109/TASC.2025.3544155

L. Zani;Q. Le Coz;K. Hamada;M. Parody-Guzman;B. Lacroix;L. Novello

{"title":"Exploring Operation Limits of JT-60SA Cryomagnet Operation: Integrated Commissioning Database Use for Modeling Analysis","authors":"L. Zani;Q. Le Coz;K. Hamada;M. Parody-Guzman;B. Lacroix;L. Novello","doi":"10.1109/TASC.2025.3544155","DOIUrl":"https://doi.org/10.1109/TASC.2025.3544155","url":null,"abstract":"In the framework of international development on fusion devices, the tokamak JT-60SA was equipped with superconducting magnets within a Europe-Japan collaboration. After a first integrated commissioning (IC) in 2021, another IC was conducted in 2023 reaching magnet energization levels compliant with 1 MA-class plasmas. The Toroidal Field (TF) coil system was loaded at nominal current and the Poloidal Field (PF) at 50% of nominal current. In the 2023 IC various energization pulse patterns were applied on PF coils to gain experience on the magnets control and protection system in operation conditions. Some tailored current pulses were applied to learn about PF coils coupling parameters and protection system, which sensitivity was found to be improved. In this environment, we developed tools and methods to model and predict the magnets behaviour to possibly identify coils limits in operation conditions. First step is with thermo-hydraulic evaluation of PF coil temperature safety margin evaluation along their pulsed current patterns. Second step is a first order analysis of the TF quench detection system sensitivity, found higher than expected to PF transients, and the contribution to possible mitigation measures to avoid spurious false positive detections. Both steps were benchmarked against experimental data collected during 2023 IC to consolidate models prediction capacities. Foreseen applications aim at checking plasma scenarios repetability rate or avoiding pulsed coil current to generate apparent fault signal in absence of real risk (mostly quench). The tools and methods are described and their rationales explained, together with their intrinsic limits and room for improvement.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143621722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0