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磁约束型聚变装置采用超导线圈流通强直流来产生高强磁场,约束高温等离子体进行聚变实验。因此,失超保护系统尤其是直流保护开关的设计极为重要。随着线圈电流的增大,设计了各种不同的开关结构来满足不断提高的开断参数的需求。总结了国内外超导聚变装置中的直流保护开关技术的发展,描述了经典的机械开关、人工电流过零关断开关的应用,介绍了先进全控器件混合式直流开关的最新研究进展,并描述了正在研究中的用于中国聚变工程实验堆(China fusion engineering test reactor,CFETR)的15k V/70k A混合式直流开关的设计挑战。
Magnetic confinement fusion device using superconducting coil circulation of strong DC to produce high-strength magnetic field, high temperature plasma confinement fusion experiments. Therefore, the design of quench protection system especially DC protection switch is very important. As the coil current increases, a variety of switch configurations are designed to meet the ever-increasing demand for breaking parameters. Summarizes the development of DC protection switch technology in domestic and foreign superconducting fusion devices, describes the application of classical mechanical switch and manual current zero-crossing switch, introduces the latest research progress of advanced full-control device hybrid DC switch Describes the design challenge for the 15k V / 70k A hybrid DC switch under study for the China Fusion engineering test reactor (CFETR).