학술논문
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
Document Type
Academic Journal
Author
Source
强激光与粒子束 / High Power Laser and Particle Beams. 36(2):77-85
Subject
Language
Chinese
ISSN
1001-4322
Abstract
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 5MW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 future large 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.The insulation design of the high-voltage components is a critical part of the power supply development process.In this paper,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 the special 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 maximum electric field strength in these components is 16.22 kV/mm,which is less than the transformer oil breakdown field strength and has 2 times the insulation margin.The structural design of the high-voltage components in this paper can meet the insulation requirements of the power supply.
Negative-ion based neutral beam injection is an indispensable auxiliary heating method for future large 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.The insulation design of the high-voltage components is a critical part of the power supply development process.In this paper,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 the special 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 maximum electric field strength in these components is 16.22 kV/mm,which is less than the transformer oil breakdown field strength and has 2 times the insulation margin.The structural design of the high-voltage components in this paper can meet the insulation requirements of the power supply.