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

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

The Radial Flux HTS Synchronous Motor Stator Windings Comparison for Electrified Aircraft Applications

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.2025.3545412

Zhishu Qiu;Aleksandr Shchukin;Muhammad Bin Younas;Hengpei Liao;Weijia Yuan;Min Zhang

{"title":"The Radial Flux HTS Synchronous Motor Stator Windings Comparison for Electrified Aircraft Applications","authors":"Zhishu Qiu;Aleksandr Shchukin;Muhammad Bin Younas;Hengpei Liao;Weijia Yuan;Min Zhang","doi":"10.1109/TASC.2025.3545412","DOIUrl":"https://doi.org/10.1109/TASC.2025.3545412","url":null,"abstract":"Electrified aircraft propulsion systems could be a key solution for achieving zero-emission aviation. The need for efficient multi-megawatt motors with high power density makes superconducting motors a promising solution. This study investigates the performance of radial flux high-temperature superconductor (HTS) synchronous motors for electrified aircraft applications, emphasizing the impact of stator windings on power density and losses. In this study, two motor benchmarks of 450 kW and 1 MW are proposed, the impact of an iron core on the stator structure is analyzed, and various stator windings including copper/aluminium Litz wires and HTS coils are compared regarding stator AC loss as well as machine power-to-weight ratio (PTW). The result indicates that air-cored stators are preferred due to their lower weight and reduced losses, particularly in cryogenic conditions. Meanwhile, HTS coils outperform Litz wires at lower cryogenic temperatures (40 K) in terms of machine PTW. At 77 K, however, aluminium Litz wires have an advantage over HTS designs for smaller machines. This study concludes that HTS stators with an air-cored structure can be a desired topology for the future high PTW motor design required in low-emission electrified aviation propulsion systems, especially at low cryogenic temperatures achieved with liquid hydrogen (<inline-formula><tex-math>$text{LH}_{2}$</tex-math></inline-formula>).","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-6"},"PeriodicalIF":1.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143655012","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}

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IEEE Transactions on Applied Superconductivity Subject Categories for Article Numbering

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.2025.3529272

引用次数: 0

Study on Ripple Loss of Self-Shielding Superconducting DC Cable Used in Liquid Hydrogen Energy Pipeline

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.2025.3545185

Wei Pi;Pu Wang;Jingyi Yang;Heng Zhang;Junhua Cheng;Chengpeng Mao;Yinshun Wang

引用次数: 0

A Current-Variation Based Quench Detection Method for Parallel Co-wound Superconducting AC Coils

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.2025.3545408

Changhao Hu;Yi Lin;Yunfei Tan;Lei Wang;Jianzhao Geng

{"title":"A Current-Variation Based Quench Detection Method for Parallel Co-wound Superconducting AC Coils","authors":"Changhao Hu;Yi Lin;Yunfei Tan;Lei Wang;Jianzhao Geng","doi":"10.1109/TASC.2025.3545408","DOIUrl":"https://doi.org/10.1109/TASC.2025.3545408","url":null,"abstract":"Magnets wound with superconducting wires, which have high current-carrying capacity, are widely utilized in various applications. In some applications, alternating current (AC) is applied to superconducting magnets, such as in superconducting synchronous electrical machinery and superconducting transformers. Quench detection in superconducting magnets is a critical prerequisite for ensuring their safe operation. However, some conventional quench detection methods commonly used for direct current (DC) superconducting magnets face limitations when applied to those subjected to AC. In this article, we investigate quench-induced current variation characteristics in parallel co-wound superconducting magnets excited with AC current and propose a quench detection method based on current variation. We conducted circuit derivation and artificial quench experiments to validate our approach. Both derivation and experimental results demonstrate that our quench detection method can detect quench with high sensitivity and reliability. This work has potential applications in AC superconducting magnets and may contribute to reducing the risk of quench-induced damage in such systems.","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":"143688124","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}

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IEEE Transactions on Applied Superconductivity Information for Authors

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.2025.3529270

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