Recent Progress of the Quench Detection in the EAST HTS Current Leads Using Distributed Optical Fibers

doi:10.1109/TASC.2023.3317182

	Recent Progress of the Quench Detection in the EAST HTS Current Leads Using Distributed Optical Fibers
	Lu, Hui 2,3; Hu, Yanlan 2; Xiao, Yezheng 2; Li, Xiaofei 1; Zheng, Longgui 1; Yan, Qing 3; Zhu, Xinxin 3
刊名	IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
	2023-11-01
卷号	33
关键词	Distributed optical fiber (OF) high-temperature superconducting current leads (HTSCL) quench detection sensor
ISSN号	1051-8223
DOI	10.1109/TASC.2023.3317182
通讯作者	Hu, Yanlan(yanlanghun@ipp.ac.cn)
英文摘要	High-temperature superconducting (HTS) current leads (CL) made of Bi-2223 superconducting tapes in Experimental and Advanced Superconducting Tokamak (EAST) are connected with the superconducting magnets and power supplies. The quench detection systems consist of primary (resistive voltage-based) and backup (temperature-based) detection systems; due to the required fast response time, the quench detection system for the EAST HTSCL relies primarily on direct voltage measurement. The traditional temperature and voltage detection methods have two main defects. First, to prevent the temperature sensor from high-voltage breakdown, it has to be installed in the rear section of the insulators, leading to its sensitivity decreasing significantly. Second, because the average zone propagation velocity of HTS is around 1/100 similar to 1/1000 of low-temperature superconducting (LTS) materials, the small resistive voltage during quench is very difficult to detect. Distributed optical fibers quench detection (DOFQD) based on Raleigh scattering (RS) can be a solution, which adopts the special communication glass fiber as the sensor. It can continuously monitor temperature changes (0.5 to 2 K) at intervals of 5 mm. At the same time, the method has the advantages of high-voltage resistance and immunity from electromagnetic interference. But the biggest drawback of this method is that the optical fiber (OF) sensor is very brittle in the transverse direction resulting in complicated installation. Recently, the OF sensor has been directly laid inside the insulation layer of the HTSCL and led out of the vessel successfully. Meanwhile, the Parsons discharge test, the thermal shock test, and the vacuum leakage rate test can come up with the technical requirements. The power-on test was shown that DOFQD could detect a quench ahead of voltage measurement when the HTSCL was soaked in the 77 K liquid nitrogen. The next plan is to apply this quench detection method in the EAST HTSCL.
资助项目	Research on Performance Improvement and Key Technology of Quench Detection System of EAST Device of China[E05F0K153Z1]
WOS关键词	TEMPERATURE
WOS研究方向	Engineering ; Physics
语种	英语
出版者	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
WOS记录号	WOS:001078576600001
资助机构	Research on Performance Improvement and Key Technology of Quench Detection System of EAST Device of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/133450]
专题	中国科学院合肥物质科学研究院
通讯作者	Hu, Yanlan
作者单位	1.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 2.Chinese Acad Sci, Hefei Inst Phys Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 3.Univ Sci & Technol China, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Lu, Hui,Hu, Yanlan,Xiao, Yezheng,et al. Recent Progress of the Quench Detection in the EAST HTS Current Leads Using Distributed Optical Fibers[J]. IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY,2023,33.
APA	Lu, Hui.,Hu, Yanlan.,Xiao, Yezheng.,Li, Xiaofei.,Zheng, Longgui.,...&Zhu, Xinxin.(2023).Recent Progress of the Quench Detection in the EAST HTS Current Leads Using Distributed Optical Fibers.IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY,33.
MLA	Lu, Hui,et al."Recent Progress of the Quench Detection in the EAST HTS Current Leads Using Distributed Optical Fibers".IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 33(2023).