Impact analysis of power supply fault-state on magnets in fusion devices

IF 1.9 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY Fusion Engineering and Design Pub Date : 2024-09-05 DOI:10.1016/j.fusengdes.2024.114656

Xining Zhang , Hua Li , Guanghong Wang , Zhiquan Song , Meng Xu , Qianglin Xu , Zhenhan Li

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Abstract

The magnet power supply system is one of the important subsystems of nuclear fusion devices. Although it has undergone strict safety and stability verification before design and operation, the experimental conditions at the work site still have uncertainty. The fast discharge unit may not be able to open and the magnet power supply may have a ground fault. Therefore, it is necessary to systematically analyze the above possible fault conditions, in order to better protect the superconducting magnet. In this paper, the quench protection system and grounding protection system of TF coil magnet power supply are theoretically analyzed and calculated. According to the calculation results, the TF coil fault simulation model is built in MATLAB/Simulink, and the influence of the fault state of the power supply on the magnet is systematically analyzed. The results show that the maximum voltage at fault is much higher than the rated voltage during operation, so a larger margin should be considered in the design process to protect the superconducting magnet. The research in this paper has certain guiding significance for the design of fast discharge unit and TF magnet coil grounding system, and plays an important role in the performance and safety of fusion device operation.

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电源故障状态对聚变装置磁体的影响分析

磁体供电系统是核聚变装置的重要子系统之一。虽然在设计和运行前经过了严格的安全性和稳定性验证，但工作现场的实验条件仍存在不确定性。快放装置可能无法打开，磁体电源可能出现接地故障。因此，有必要对上述可能出现的故障情况进行系统分析，以便更好地保护超导磁体。本文对 TF 线圈磁体电源的淬火保护系统和接地保护系统进行了理论分析和计算。根据计算结果，在 MATLAB/Simulink 中建立了 TF 线圈故障仿真模型，系统分析了电源故障状态对磁体的影响。结果表明，故障时的最大电压远高于工作时的额定电压，因此在设计过程中应考虑较大的裕量来保护超导磁体。本文的研究对快速放电装置和 TF 磁体线圈接地系统的设计具有一定的指导意义，对核聚变装置运行的性能和安全具有重要作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fusion Engineering and Design 工程技术-核科学技术

CiteScore

3.50

自引率

23.50%

发文量

275

审稿时长

3.8 months

期刊介绍： The journal accepts papers about experiments (both plasma and technology), theory, models, methods, and designs in areas relating to technology, engineering, and applied science aspects of magnetic and inertial fusion energy. Specific areas of interest include: MFE and IFE design studies for experiments and reactors; fusion nuclear technologies and materials, including blankets and shields; analysis of reactor plasmas; plasma heating, fuelling, and vacuum systems; drivers, targets, and special technologies for IFE, controls and diagnostics; fuel cycle analysis and tritium reprocessing and handling; operations and remote maintenance of reactors; safety, decommissioning, and waste management; economic and environmental analysis of components and systems.