kA级双阶梯脉冲电源方案设计与分析

陈俊宏; 肖东华; 熊玉珍; 王英翘; 陈小昌; 宣伟民; 戢洋

doi:10.11884/HPLPB202436.230243

kA级双阶梯脉冲电源方案设计与分析

doi: 10.11884/HPLPB202436.230243

1.
核工业西南物理研究院聚变科学所，成都 610041
2.
南昌大学物理与材料学院，南昌 330031

基金项目: 四川省科技计划项目(2021JDTD0022、MZGC20230009)

详细信息

作者简介:
陈俊宏，chenjh@swip.ac.cn

中图分类号: TM461.4
计量
- 文章访问数: 195
- HTML全文浏览量: 80
- PDF下载量: 65
- 被引次数: 0
出版历程
- 收稿日期: 2023-07-31
- 修回日期: 2023-10-13
- 录用日期: 2023-10-07
- 网络出版日期: 2023-11-14
- 刊出日期: 2024-01-12

Design and analysis of kA stepped pulse current generation scheme

1.
Center for Fusion Science, Southwestern Institute of Physics, Chengdu 610041, China
2.
School of Physics and Materials Science, Nanchang University, Nanchang 330031, China

摘要

摘要: 托卡马克装置预电离过程中，环向磁场应与电子回旋波频率相匹配，NCST装置现有的电子回旋波频率较低，为了让环向场与已有的电子回旋波频率匹配，提出新的环向场线圈电流产生方案，在原方案的磁场线圈平顶电流产生之前增加一个低电流台阶。回顾NCST球形托卡马克装置环向场线圈电源的原有方案后，设计了全控型和半控型两种方案，从电压电流的高次谐波、电流的可控性和纹波、改动成本和安装便捷性四方面对比两个方案的优缺点，最终选定半控型改造方案。根据现场条件制作电源改造柜，尽量减少对原有电源柜的改动。实际测试结果显示，两个电流台阶衔接正常，低电流台阶宽度可调、幅值可调，满足改造要求。
- NCST /
- 球形托卡马克装置 /
- 环向场线圈电源 /
- 预电离 /
- 双阶梯脉冲电流
Abstract: Toroidal magnetic field should match frequency of the electron cyclotron wave in pre-ionization process of the Tokamak device. The existing electron cyclotron wave frequency of the NCST (Nanchang Spherical Tokamak) is low. A new toroidal coil current generation scheme is proposed to match the current electron cyclotron wave frequency. A low current step is added before the existing flat top current of original scheme. After reviewing the original scheme of the toroidal coil power supply of NCST, two schemes of full control and semi-control are designed. Advantages and disadvantages of the two schemes are compared from four aspects: high order harmonics of voltage and current, controllability and ripple of current, modification cost and installation convenience, and finally the semi-control transformation scheme is selected. The power supply cabinet is modified according to the field conditions with minimum alteration. Actual test results show that the two current steps are connected normally, and the width and amplitude of low current steps are adjustable, which meets the transformation requirements.
- NCST /
- spherical tokamak /
- toroidal field power supply /
- preionization /
- double-step pulse current

HTML全文

图 1 环向场线圈电源电流波形示意图

Figure 1. Current diagram of Toroidal coil power supply

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图 2 原方案^{[6, 12]}

Figure 2. Conventional scheme^{[6, 12]}

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图 3 改造方案

Figure 3. Modified schemes

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图 4 半控型方案的环向场线圈波形

Figure 4. Waveforms of toroidal coil in half controlled scheme

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图 5 电容量和初始电压对电流上升时间和电流峰值的影响

Figure 5. t_m and I_max influenced by capacitance and initial voltage

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图 6 全控型方案的环向场线圈波形

Figure 6. Waveforms of toroidal coil in fully controlled scheme

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图 7 负载电压和电流细节

Figure 7. Detail of voltage and current ripples

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图 8 负载电压谐波成分分析

Figure 8. FFT analysis of load voltage

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图 9 负载电流波动率

Figure 9. Ratio of current fluctuation in different schemes

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图 10 改造前电流波形

Figure 10. Actual current waveform before modification

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图 11 改造后电流波形

Figure 11. Actual current waveforms after modification

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