南方能源建设2024，Vol.11Issue(3)：137-145,9.DOI:10.16516/j.ceec.2024.3.15
HL-3聚变用大容量Crowbar
Large Capacity Crowbar for HL-3 Fusion
摘要
Abstract
[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 HL-3 protection were realized.[Conclusion]Under thermal and stability checking calculation,it is completely feasible to realize the 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Key words
nuclear fusion/thyristor/crowbar/protection switches/design application分类
能源科技引用本文复制引用
吴琳君,李海燕,雷枭,吴一,刘邵轩..HL-3聚变用大容量Crowbar[J].南方能源建设,2024,11(3):137-145,9.基金项目
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) （2018YFE0301103）
