Research and Experiment on Quench Detection Technology of HTS Current Leads Based on Distributed Optical Fibers

doi:10.1080/15361055.2019.1690927

	Research and Experiment on Quench Detection Technology of HTS Current Leads Based on Distributed Optical Fibers
	Chen, Bin 1,2; Li, Jiangang 2; Hu, Yanlan 2; Wang, Teng 1,2; Zhou, Chao 2
刊名	FUSION SCIENCE AND TECHNOLOGY
	2020-02-17
卷号	76
关键词	High-temperature superconductor current leads quench detection optical frequency domain reflection distributed optical fiber
ISSN号	1536-1055
DOI	10.1080/15361055.2019.1690927
通讯作者	Hu, Yanlan(yanlanghun@ipp.ac.cn)
英文摘要	High-temperature superconductor (HTS) current leads are important components of the EAST and CFETR tokamaks, which are responsible for operating the high parametric current. HTS current leads are made of Bi-2223/Ag-Au alloy tapes, which have the characteristics of slow quench propagation speed and weak quench signal. Traditional thermometers are easily damaged by the high voltage from the current leads, and the terminal voltage signal cannot reflect the hot spot changes of current leads in real time. In this paper, a novel quench detection method based on optical frequency domain reflection technology is proposed. Temperature variations of HTS can be obtained in real time by demodulating the Rayleigh scattered spectrum from the distributed optical fiber attached to the surface of HTS stacks. This paper describes a quenching experiment for one pair of 1-kA small current leads. The external thermal disturbance is increased to explore the quench propagation of HTS current leads under the condition of a self-field, 77 to 80 K air and conduction combined cooling method. From the experimental results, the temperature distribution map of the whole HTS lead is obtained. Compared with the quench voltage, the spectral shift of the fiber appeared to be about 2 s ahead, and the hot spot position can be located with 1-cm accuracy.
WOS关键词	TAPE
WOS研究方向	Nuclear Science & Technology
语种	英语
出版者	TAYLOR & FRANCIS INC
WOS记录号	WOS:000519307400003
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/103751]
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.Univ Sci & Technol China, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Chen, Bin,Li, Jiangang,Hu, Yanlan,et al. Research and Experiment on Quench Detection Technology of HTS Current Leads Based on Distributed Optical Fibers[J]. FUSION SCIENCE AND TECHNOLOGY,2020,76.
APA	Chen, Bin,Li, Jiangang,Hu, Yanlan,Wang, Teng,&Zhou, Chao.(2020).Research and Experiment on Quench Detection Technology of HTS Current Leads Based on Distributed Optical Fibers.FUSION SCIENCE AND TECHNOLOGY,76.
MLA	Chen, Bin,et al."Research and Experiment on Quench Detection Technology of HTS Current Leads Based on Distributed Optical Fibers".FUSION SCIENCE AND TECHNOLOGY 76(2020).