HL-3聚变用大容量Crowbar  

Large Capacity Crowbar for HL-3 Fusion

作　　者：吴琳君 李海燕 雷枭 吴一 刘邵轩 WU Linjun;LI Haiyan;LEI Xiao;WU Yi;LIU Shaoxuan(Guangzhou Kinte Industrial Co.,Ltd.,Guangzhou 510860,Guangdong,China;Southwestern Institute of Physics,China National Nuclear Corporation,Chengdu 610225,Sichuan,China;ENN Fusion Technology R&D Center,Langfang 065099,Hebei,China)

机构地区：[1]广州擎天实业有限责任公司,广东广州510860 [2]中国核工业集团公司核工业西南物理研究院,四川成都610225 [3]新奥聚变研究中心,河北廊坊065099

出　　处：《南方能源建设》2024年第3期137-145,共9页Southern Energy Construction

基　　金：国家磁约束核聚变能发展研究专项资助项目“高精度数据实时获取处理及通讯技术研究”(2018YFE0301103)。

摘　　要：[目的]面向HL-3聚变大科学装置极端故障能量快速转移,配置短路保护用大容量旁路开关需求。[方法]基于HL-3磁体电源参数,结合电力电子变流技术及可控硅触发应用基础,针对快速冲击应用中多并联可控硅一致性导通及稳定均流的严苛工况,融合电力电子变流工程实践经验,经并联分支导电线路等长型式改良;并联元件参数一致性筛选,并联臂内元件位置与参数差异化选配;通过在可控硅侧附加串联电阻物理强迫均流,并对附加电阻热稳定性核算,并联桥臂电动力冲击验算;可控硅元件高频脉冲列强触发等手段和方法。[结果]推导设计了一种稳定的可控硅220 kA级大容量聚变用crowbar旁路保护电子开关系统,经试验模拟实测验证及实载160 kA冲击考验,实现了HL-3保护用大容量旁路开关的匹配要求。[结论]在做好热动、稳定性验算的基础上,采用线路改良,附加物理强迫均流,元件参数筛选及装配,触发模式调整等综合手段,实现大容量crowbar在聚变中的配套应用是完全可行的。[Introduction]Facing the rapid transfer of extreme fault energy of the HL-3 fusion scientific apparatus,it is required to configure a large-capacity bypass switch for short-circuit protection.[Method]Based on the parameters of HL-3 magnet power supply,and in combination with power electronic converter technology and thyristor trigger application foundation,this paper integrated the practical experience of power electronic converter engineering,and used the following means and methods at the harsh working conditions of multi-parallel thyristor consistency conduction and stable current sharing in fast impact application:the equal length type improvement of parallel branch conductive circuit;consistency screening of parallel component parameters,differential selection of component position and parameters in parallel arm;physically forced current sharing by adding a series resistance on the side of the silicon controlled rectifier,calculation of the thermal stability of the additional resistance,and checking calculation of the electrodynamics impact of the parallel bridge arm;thyristor high-frequency pulse train strong trigger.[Result]A stable crowbar bypass protection electronic switch system for high-capacity fusion of 220 kA class of thyristor was deduced and designed,which was verified by experimental simulation and 160 kA impact test under actual load,and the matching requirements of large-capacity bypass switch for matching application of large-capacity crowbar in fusion by adopting comprehensive means such as circuit improvement,additional physical force current sharing,component parameter screening and assembly,and trigger mode adjustment.

关 键 词：核聚变 可控硅 CROWBAR 保护开关 设计应用 

分 类 号：TL4[核科学技术—核技术及应用] TL62