中性束注入系统加速极电源高压部件设计  

Design of high-voltage components for acceleration grid power supply of neutral beam injection system

作　　者：张鸿淇 李志恒[1] 马少翔 张明[1] Zhang Hongqi;Li Zhiheng;Ma Shaoxiang;Zhang Ming(International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics,School of Electrical and ElectronicEngineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学电气与电子工程学院,磁约束聚变与等离子体国际合作联合实验室,武汉430074

出　　处：《强激光与粒子束》2024年第2期77-85,共9页High Power Laser and Particle Beams

基　　金：国家重点研发计划项目(2017YFE0300104);国家自然科学基金项目(51821005)。

摘　　要：基于负离子的中性束注入是未来大型托卡马克装置不可或缺的辅助加热方式。中性束系统中的加速极电源需要输出-200 kV电压和5 MW的功率,还经常面临负载短路和断路的特殊工况。过去对加速极电源的研究中缺少高压部分的方案设计,而电源中高压部件的绝缘设计是电源研制过程中必不可少的关键环节。据电源指标和特殊工况的特点,计算了电源高压部分的隔离升压变压器、高压整流器和高压滤波器的电路参数,并对这些部件基于油浸式绝缘进行了工程设计,通过有限元仿真分析进行了绝缘验证。仿真结果表明,这些部件中的电场强度最高为16.22 kV/mm,小于变压器油击穿场强并具有2倍的绝缘裕度。设计的高压部件结构可以满足电源的绝缘要求。Negative-ion based neutral beam injection is an indispensable auxiliary heating method for futurelarge tokamak devices.The acceleration grid power supply in the neutral beam system requires an output voltage of-200 kV and a power of 5 MW,and often faces special conditions of sudden short-circuit and disconnection of the load.The design of the high-voltage components is still missing in the research of the acceleration grid power supply.Theinsulation design of the high-voltage components is a critical part of the power supply development process.In thispaper,the circuit parameters of the step-up transformer,high-voltage rectifier and high-voltage filter of the high-voltage part of the power supply are calculated according to the power supply index and the characteristics of thespecial working conditions,the engineering design based on oil-immersed insulation of these parts is also carried out,and the insulation is verified by finite element simulation analysis.The simulation results show that the maximumelectric field strength in these components is 16.22 kV/mm,which is less than the transformer oil breakdown fieldstrength and has 2 times the insulation margin.The structural design of the high-voltage components in this paper canmeet the insulation requirements of the power supply.

关 键 词：中性束注入 加速极电源 高电压 有限元仿真 绝缘验证 

分 类 号：TM832[电气工程—高电压与绝缘技术]