Design of fuse protection of pulse capacitor for KTX power supply

doi:10.16568/j.0254-6086.202601009

Nuclear Fusion and Plasma Physics ›› 2026, Vol. 46 ›› Issue (1): 57-62.DOI: 10.16568/j.0254-6086.202601009

• Nuclear Fusion Engineering • Previous Articles Next Articles

Design of fuse protection of pulse capacitor for KTX power supply

FENG Hu-lin1 , WANG Deng-hui1 , HE Bao-can1 , DONG Yu-qi1, 2, PAN Sheng-min1 , LU Jing1 ,WU Ya-nan1

(1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031;2. Institute of Material Science and Information Technology, Anhui University, Hefei 230601)

Received:2024-01-16 Revised:2025-01-13 Online:2026-03-15 Published:2026-03-12

KTX 电源脉冲电容器熔断器保护设计

冯虎林 1，王邓辉 1，何宝灿*1，董玉琦 1, 2，潘圣民 1，卢晶 1，吴亚楠 1

(1. 中国科学院等离子体物理研究所，合肥 230031；2. 安徽大学物质科学与信息技术研究院，合肥 230601)

作者简介:冯虎林(1986-)，男，安徽合肥人，工程师，硕士，从事电路与系统方面研究。
基金资助:
聚变堆主机关键系统综合研究设施(2018-000052-73-01-001228)；安徽省能源互联网基金(2108085UD10)

Abstract

Abstract: The power supply system of the Keda Torus eXperiment (KTX) uses pulse capacitor banks for energy storing, providing instantaneous power of exceeding 200 MW. Therefore, short circuit protection of pulse capacitors is crucial, the design and reliability test of fuses is key to pulse capacitor protection. As the cost of protection equipment of KTX power supply is high, a low-cost fuse is studied independently to protect the safety of the capacitor bank. The cross-sectional area of the fuse is determined based on the temperature rise requirements. The length of the fuse is confirmed through the minimum voltage drop requirement of the pulse capacitor and the minimum fusing critical energy of the fuse. The simulation and experimental verification are conducted, and the safety and reliability of the fuse development is validated during the long-term operation of KTX power supply.

Key words: KTX power supply, Pulse capacitor, Short-circuit protection, Fuse design

摘要： 反场箍缩磁约束聚变实验装置(KTX)的电源系统采用脉冲电容器组供电，提供的瞬间功率超过 200 MW，因此脉冲电容器的短路保护至关重要，熔断器的设计和可靠性测试成为脉冲电容器保护的关键。KTX 电源的高压高储能脉冲电容器保护设备造价高，采用自主设计的低成本的熔断器保护电容器组的安全。根据温升要求，确定了熔断器的截面积。通过脉冲电容器最低压降要求及熔断器的最低熔断临界能量，确定了熔断器的长度，并且通过了仿真和实验验证。最终经过 KTX电源长时间的运行验证了熔断器选择的安全和可靠性。

关键词: KTX 电源, 脉冲电容器, 短路保护, 熔断器设计

CLC Number:

TM13

FENG Hu-lin , WANG Deng-hui , HE Bao-can , DONG Yu-qi, , PAN Sheng-min , LU Jing , WU Ya-nan. Design of fuse protection of pulse capacitor for KTX power supply[J]. Nuclear Fusion and Plasma Physics, 2026, 46(1): 57-62.

冯虎林, 王邓辉, 何宝灿, 董玉琦, 潘圣民, 卢晶, 吴亚楠 . KTX 电源脉冲电容器熔断器保护设计[J]. 核聚变与等离子体物理, 2026, 46(1): 57-62.

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Design of fuse protection of pulse capacitor for KTX power supply

KTX 电源脉冲电容器熔断器保护设计

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