基金项目:
国家国际热核聚变实验堆(ITER)计划项目(2012GB104000);
国家自然科学基金面上项目(11675074);
Project supported by National ITER Fusion Development (2012GB104000), National Natural Science Foundation of China (11675074);
The success rate and quality of the neutral beam extraction are determined by the ability of suppressed electron and the reliability of the suppressed grid power supply (SGPS). The full solid SGPS is developed based on IGBT’s characteristics of the 5 MW level neutral beam injection (NBI) on HL-2M Tokomak. The power supply consists mainly of 10 modules in series, with index 500 V/20 A. Each of the modules has the isolated transformer, the rectifier, the filter, IGBT switch, drive circuit, diode, and auxiliary DC source. The embedded systems STM32 are used for controlling these modules via fibers, setting output voltage, monitoring the current and protecting the SGPS. The optimized analysis are carried out, including the connection mode of the three-electrode accelerator between SGPS and the accelerator power supply and protection method. Assuming the minimum suppress time is 13 ms in the arcing state, the optimization of the minimum value of the capacitor is 500 μF and the protection resistor in series between SGPS and the suppress grid is 200 Ω. Our experiments demonstrate that the output with amplitude of 5 kV and peak current of 40 A are available in operation alone, and can be turned off within 20 microseconds to protect the SGPS. At the same time,compared the new full solid SGPS with the previous equipment on NBI system, the experimental results show that the extracted beam success rate will increase more than 20%. The whole SGPS meets the requirements of NBI system.
KEY WORDS :neutral beam injection (NBI);three electrode accelerator;suppress grid;high-voltage power supply;embedded system;
图8
抑制极与加速极上引出瞬间波形
Fig.8
Instantaneous waveforms between the accelerate grid and the suppress grid
参考文献
[1]
LIU DQ, RANH, LIG.S, et al. Engineering design for the HL-2M Tokamak components[J]. , 2013, 88(3): 679-682.
[2]
CAO JY, WEI HL, ZOU GQ, et al.Conceptual design of 5MW-NBI injector for HL-2M Tokamak[J]. , 2013, 88(3): 872-877.
[3]
IKEDAY, AKINON, EBISAWAN, et al.Technical design of NBI system for JT-60SA[J]. , 2007, 82(5/14): 791-797.
[4]
陈文光,饶军,李波,等. 中性束注入强流离子源放电电源及其时序控制[J]. ,2011,37(6):1452-1458.CHENWenguang, RAOJun, LIBo, et al.Arc discharge power supplies and control sequence for high beam current of neutral beam injection ion source[J]. , 2011, 37(6): 1452-1458.
[5]
肖秀栋,陈文光. 中性束注入器抑制极电源技术研究[J]. ,2010,30(4):558-561.XIAOXiudong, CHENWenguang.Research on the technology of the power supply for NBI suppressed grid[J]. , 2010, 30(4): 558-561.
[6]
徐政,肖晃庆,张哲任. 模块化多电平换流器主回路参数设计[J]. ,2015,41(8):2514-2527.XUZheng, XIAOHuangqing, ZHANGZheren.Design of main circuit parameters of modular multilevel converters[J]. , 2015, 41(8): 2514-2527.
[7]
赵鑫,张乔根,白雁力,等. MOSFET在感应叠加型高压双方波脉冲发生装置中的应用[J]. ,2015,41(12):4066-4072.ZHAOXin, ZHANGQiaogen, BAIYanli, et al.Application of MOSFET in high voltage double square-wave pulses generator with inductive adder configuration[J]. , 2015, 41(12): 4066-4072.
[8]
TOOKER JF, HUYNHP, STREET RW.Solid-state high voltage modulator and its application to rf source high voltage power supplies[J]. , 2009, 84(7/11): 1857-1861.
[9]
BEAUMONTB, BERTRANDE, BRUGNETTIR, et al., 2005(75/79): 1281-1285.
[10]
蔡政平,武志勇,李伟松. 1.5 MW高功率连续波PSM电源研制[J]. ,2016,42(3):762-768.CAIZhengping, WUZhiyong, LIWeisong.Development of 1.5 MW high power PSM power supply[J]. , 2016,42(3): 762-768.
[11]
饶益花,陈文光,饶军,等. 电子回旋共振加热系统中阳极高压电源研制及其控制技术[J]. ,2016,42(12):4036-4041.RAOYihua, CHENWenguang, RAOJun, et al.Anode high-voltage power supply and control technology for electron cyclotron resonance heating system[J]. , 2016, 42(12): 4036-4041.
[13]
VILLECROZEAF, CHRISTINAL, ESCHA de H P L, et al. Energetic high-voltage breakdowns in vacuum over a large gap for ITER neutral beam accelerator[J]. , 2013, 88(3): 891-894.
[14]
魏会领,曹建勇,杨宪福,等. HL-2A装置中性束离子源引出系统束流分析[J]. ,2014,26(11):4006-4009.WEIHuiling, CAOJianyong, YANGXiangfu, et al.Beam current in extraction system of neutral beam ion sourceon HL-2A[J]. , 2014, 26(11): 4006-4009.
[15]
邹桂清,钟光武,雷光玖,等. 大功率多磁极会切场离子源的弧放电特性分析[J]. ,2008,32(增刊1):283-285.ZOUGuiqiong, ZHONGGuangwu, LEI Guangjiu, e t al. Arc discharge performance analysis for a high power bucket ion source[J]. , 2008, 32(Supplement 1): 283-285.
[16]
马定辉,饶军, 曹建勇,等. HL-2A装置NBI离子源抑制极电源的实验分析[J]. ,2012,32(4):332-337.MADinghui, RAOJun, CAOJianyong, et al.Study on suppressor gird power supply of NBI ion source on HL-2A Tokamak[J]. , 2012, 32(4): 332-337.