Quench Detection Design for CFETR CSMC

Wang, Teng; Hu, Yanlan; Liu, Huajun; Wu, Yu; Shi, Yi; Pan, Chao; Zheng, Longgui

doi:10.1080/15361055.2017.1415613

Cited by 7 publications

(1 citation statement)

References 3 publications

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“…Superconducting magnet is one of the most complex and important core components of the Tokamak device, and quench phenomenon can easily lead to the burning of the magnet, resulting in tens of millions of economic losses (Wang K et al, 2020;Lopes et al, 2021;Gorit et al, 2022). Accurate and effective quench detection is an important prerequisite for quench protection, which is crucial to the long-term safe and stable operation of the Tokamak device (Wang et al, 2018;Risse et al, 2019). To respond to the requirements of plasma millisecond-level fast control and variable magnetic field, the trigger control mode of converter of the Tokamak power supply exhibits the characteristic of extreme asymmetry and drastic instantaneous change (Xiong et al, 2021;.…”

Section: Introductionmentioning

confidence: 99%

Harmonic analysis on direct-current side of tokamak power supply under asymmetrical triggering

Wu²,

Lü³

et al. 2023

Front. Energy Res.

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Tokamak is a promising device for using nuclear fusion energy, and the triggering of Tokamak power supply has the characteristics of extreme asymmetry and drastic instantaneous change, which bring spectrum-rich harmonics to the DC side of the power supply, threatening the operational safety of the device. Although the harmonic analysis method of the DC side already exists, however, it still has the problem of cumbersome and inaccurate calculation when it is oriented to fusion power systems with complex operation modes. Based on the three-phase unified switching function, this paper introduces delay factor, and establishes a non-linear function model of converter suitable for the case of asymmetrical triggering. According to the principle of the switching function method, the frequency domain equation of the proposed model is obtained, then combined with power grid parameters, the harmonic analysis of the DC side can be derived. The correctness of the theoretical analysis is verified by comparing the calculation results with the harmonic frequency spectrum data obtained by direct Fourier decomposition of the DC side voltage.

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