A commutation analytical model for quench protection of the CFETR central solenoid model coil

Tianbai DENG (邓天白); Ge GAO (高格); Yanan WU (吴亚楠); Jun LI (李俊); Peng FU (傅鹏); Sheng LIU (刘生); Min WANG (王敏)

doi:10.1088/2058-6272/ab81a5

Plasma Science and Technology > 2020 > 22(6): 65603-065603. > DOI: 10.1088/2058-6272/ab81a5

Tianbai DENG (邓天白), Ge GAO (高格), Yanan WU (吴亚楠), Jun LI (李俊), Peng FU (傅鹏), Sheng LIU (刘生), Min WANG (王敏). A commutation analytical model for quench protection of the CFETR central solenoid model coil[J]. Plasma Science and Technology, 2020, 22(6): 65603-065603. DOI: 10.1088/2058-6272/ab81a5

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A commutation analytical model for quench protection of the CFETR central solenoid model coil

¹ Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China
² University of Science and Technology of China, Hefei 230026, People's Republic of China
³ China International Nuclear Fusion Energy Program Execution Center, Beijing 100862, People's Republic of China

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Received Date: February 06, 2020
Revised Date: March 15, 2020
Accepted Date: March 19, 2020

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Abstract

Abstract

A central solenoid model coil will be set up to develop and verify the technique for the full-size central solenoid coil of the China Fusion Engineering Test Reactor. In case of quench and failures of superconducting coils, the quench protection (QP) system, which employs fuse-based commutation technology, is designed. This paper presents an analytical model to investigate the commutation process in the QP circuit. The model consists of the QP circuit equations, the breaker arc model, the fuse pre-arc model, and the fuse arc model. The model is employed in the whole commutation process including current transfer from breaker branch to the fuse branch model, then from fuse branch to the discharge resistor branch, and current decrease to zero in the discharge resistor. The experiment result verified the effectiveness of the presented model. The model might be helpful for design of the fuse and optimization of the commutation circuit.
- quench protection,
- fuse model,
- arc model,
- superconducting magnet,
- central solenoid model coil

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References

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A commutation analytical model for quench protection of the CFETR central solenoid model coil