CFETR失超保护系统总体设计研究

  目的  中国聚变工程实验堆（CFETR）失超保护系统转移并消耗失超状态下超导磁体中储存的巨大能量，使其免受损坏。为了满足CFETR失超保护系统的设计需求，文章进行了系统总体设计。  方法  介绍了失超保护系统的基本原理和动作逻辑，分别描述了纵场线圈（TF）失超保护单元以及极向场/中心螺管线圈（PF/CS）失超保护单元的系统设计参数。  结果  对当前所设计的两种不同方案进行分析，主要介绍了失超保护开关的拓扑结构、开关动作逻辑以及其他部件的设计需求。  结论  对于系统总体设计方案，由于成本低、占地少、技术相对成熟且可行性高，电流人工过零关断的机械式直流开关作为首选方案。考虑到良好的发展前景，机械开关和固态开关相结合的混合直流开关作为备选方案。

Research on Overall Design of Quench Protection System for CFETR

  Introduction  The huge energy stored in the superconducting magnet in quench state is transferred and consumed by China Fusion Engineering Experimental Reactor (CFETR) quench protection system to prevent it from damage. In order to meet the design requirements of CFETR quench protection system, the overall design of the system is carried out in this paper.   Method  The basic principle and action logic of quench protection system were introduced, and the system design parameters of toroidal field coil (TF) quench protection unit and poloidal field / central solenoid coil (PF/CS) quench protection unit were described respectively.   Result  The two different schemes currently designed are analyzed. The topological structure and the switching logic of the quench protection switch, and the design requirements of other components are mainly introduced.   Conclusion  For the overall design scheme of the system, due to low cost, less land occupation, relatively mature technology and high feasibility, the mechanical DC switch with artificial current zero-crossing is the preferred scheme. Taking into account good prospects for development, hybrid DC switch with mechanical switch and solid-state switch is chosen as alternative.