Multi-coupled commutation analysis in EAST poloidal field quench protection circuits based on fuse model

doi:10.1016/j.fusengdes.2020.111723

	Multi-coupled commutation analysis in EAST poloidal field quench protection circuits based on fuse model
	Deng, Tianbai 1,2; Gao, Ge 1; Fu, Peng 1; Huang, Liansheng 1; Song, Zhiquan 1; He, Shiying 1; Wang, Zhen 1,2; Wang, Zhongma 1,2; Wang, Zhenshang 1,2; Chen, Tao 1,2
刊名	FUSION ENGINEERING AND DESIGN
	2020-06-01
卷号	155
关键词	Fuse model Arc model Quench protection Multi-coupled coils Poloidal field
ISSN号	0920-3796
DOI	10.1016/j.fusengdes.2020.111723
通讯作者	Gao, Ge(gg@ipp.ac.cn)
英文摘要	The poloidal field (PF) power supply (PS) system provides megawatt controllable energy to 14 PF coils in Experiment Advanced Superconducting Tokamak (EAST). The quench protection (QP) circuit in PF power supply system is designed to implement the superconducting coil protection in case of quench. A fuse employed in QP circuit plays an important role in diverting the coil current into the discharge resistor. However, the fuses in 12 QP circuits may turn off at different time due to different self-inductance of coils and initial current. Moreover, the PF circuits are quite complex due to the mutual coupling among the superconducting coils. This means that in fuse melting time the current variation in one of the coupled circuits may produce undesired current rising on the other PF circuits. This phenomenon has been found in experiment with the shot number 82,248. To analyze the multi-coupled commutation in QP circuit, a detail fuse model is necessary. This paper presented a detail fuse model at first. The fuse model consists of a two-dimensional pre-arc model considered the cooling effect of sand and a zero-dimensional arc model. Then the fuse model is integrated with the commutation circuit equations and the mutual coupling coils model. All described models are coded in a parallel computing program. Finally, the proposed integrated model is validated by comparing to an engineering test experiment data without plasma on EAST. The computed value is close to the experiment data, and the current rising phenomenon found in experiment is explained by the combined affection of time lag of fuses turnoff time and mutual coupling. The presented model is utilized to analyze the quench protection circuit response in a large variety of different conditions to ensure the safety of coils in quench scenarios. Furthermore, it might be applied in fuse design
资助项目	National Key R&D Program of China[2017YFE0300504]
WOS关键词	SYSTEM
WOS研究方向	Nuclear Science & Technology
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000535912200003
资助机构	National Key R&D Program of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/103197]
专题	中国科学院合肥物质科学研究院
通讯作者	Gao, Ge
作者单位	1.Chinese Acad Sci, Inst Plasma Phys, Hefei, Peoples R China 2.Univ Sci & Technol China, Hefei, Peoples R China
推荐引用方式 GB/T 7714	Deng, Tianbai,Gao, Ge,Fu, Peng,et al. Multi-coupled commutation analysis in EAST poloidal field quench protection circuits based on fuse model[J]. FUSION ENGINEERING AND DESIGN,2020,155.
APA	Deng, Tianbai.,Gao, Ge.,Fu, Peng.,Huang, Liansheng.,Song, Zhiquan.,...&Chen, Tao.(2020).Multi-coupled commutation analysis in EAST poloidal field quench protection circuits based on fuse model.FUSION ENGINEERING AND DESIGN,155.
MLA	Deng, Tianbai,et al."Multi-coupled commutation analysis in EAST poloidal field quench protection circuits based on fuse model".FUSION ENGINEERING AND DESIGN 155(2020).