泄能支路对CFETR失超保护系统影响分析

仝玮; 宋执权; 傅鹏; 李华; 张秀青; 汪舒生

doi:10.11884/HPLPB201931.190050

泄能支路对CFETR失超保护系统影响分析

doi: 10.11884/HPLPB201931.190050

仝玮^{1, 2,},
宋执权^1, ,,
傅鹏¹,
李华¹,
张秀青¹,
汪舒生^{1, 2}

1.
中国科学院合肥物质科学研究院, 等离子体物理研究所, 合肥 230031
2.
中国科学技术大学科学岛分院, 合肥 230026

详细信息

作者简介:
仝玮(1993—), 男, 博士研究生, 从事聚变电源失超保护系统研究, tongwei@ipp.ac.cn

通讯作者:
宋执权(1975—), 男, 研究员, 从事大功率聚变电源系统及开关技术研究, zhquansong@ipp.ac.cn

中图分类号: TL62, TM135
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- 被引次数: 0
出版历程
- 收稿日期: 2019-02-25
- 修回日期: 2019-04-25
- 刊出日期: 2019-08-15

Influence analysis of discharge branch on the reliability of quench protection system in CFETR

Tong Wei^{1, 2
,},
Song Zhiquan^{1
, ,},
Fu Peng¹,
Li Hua¹,
Zhang Xiuqing¹,
Wang Shusheng^{1, 2}

1.
Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
2.
Science Island Branch, University of Science and Technology of China, Hefei 230026, China

摘要

摘要: 中国聚变工程实验堆(CFETR)是中国自主设计的下一代聚变装置，其超导线圈的电流最大达到100 kA。失超保护系统尤其是直流保护开关的可靠性对于超导线圈的保护极为重要。分析了系统中泄能回路参数对CFETR失超保护开关的动作可靠性影响，首先通过理论计算分析杂散参数对开关动作的影响趋势，然后通过仿真求解关断过程中各支路电流电压来验证计算。计算结果证明，较大的泄能支路杂散参数将改变直流开关的关断参数，并降低直流保护开关的动作可靠性。最后对泄能电阻杂散电感提出小于120 μH的设计要求，确保系统安全可靠地运行。
- CFETR /
- 失超保护 /
- 直流保护开关 /
- 杂散电感 /
- 泄能支路 /
- 可靠性
Abstract: China fusion engineering test reactor(CFETR) is a magnetic confinement fusion device designed, which used high current magnetic field in the superconducting coil to generate high intensity magnetic field, thus constraining the high-temperature plasma to conduct fusion experiments. Therefore, the reliability of quench protection system, especially DC protection switch, is very important for the protection of the superconducting coil. However, the reliability of the DC protection switch is affected by many factors, including the action time, the speed of arc extinguishing, the current drop rate of the switch and the voltage rise rate around zero-crossing point. In the literature on quench protection system design of Tokamak devices such as international thermonuclear experimental reactor (ITER), the influence of circuit stray parameters on switch reliability is rarely described, and the influence of discharge circuit to quench protection system is less. However, the larger stray parameters of discharge circuit will greatly reduce the operational reliability of the DC protection switch and even lead to failure and damage of the switch. In this paper, the influence of the parameters of the discharge branch on the reliability of the quench protection system in CFETR is analyzed. Firstly, the influence factors and the influence trend are analyzed by theoretical calculation, and the correctness of the theoretical analysis of the current and voltage of each branch is carried out in a set of simulations. The simulation results show that when the stray inductance of discharge branch is large, the turnoff parameters of each branch will be greatly impacted, which directly affects the reliability quench protection system in CFETR.
- CFETR /
- quench protection /
- DC protection switch /
- stray inductance /
- discharge branch /
- reliability

HTML全文

图 1 CFETR失超保护系统主电路简化图

Figure 1. Simplified circuit diagram of the quench protection systemin CFETR

下载: 全尺寸图片幻灯片

图 2 CFETR失超保护系统动作时序示意图

Figure 2. Action sequence of each component in quench protection system

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图 3 忽略泄能支路杂散电感情况下失超保护系统中各支路电流电压波形图

Figure 3. Voltage and current waves of each branch in quench protection system in the case of neglecting the stray inductance of discharge branch

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图 4 不同杂散电感参数下真空开关电压波形图

Figure 4. Voltage waves of VCB under different stray inductance

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图 5 不同杂散电感参数下电容器电压波形图

Figure 5. Voltage waves of capacitor under different stray inductance

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表 1 无泄能支路杂散电感情况下系统各部件仿真参数

Table 1. Simulation parameter of quench protection system without considering stray inductance of discharge branch

L/μH	C/mF	U_C0/kV	R_dc/mΩ
25	9	7.5	500

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表 2 不同杂散电感情况下各支路电压参数对比

Table 2. Comparison of each branch voltage under different stray inductance

stray inductance/μH	peak value of reverse recovery voltage of VCB/kV	peak value of forward recovery voltage of VCB/kV	peak value of charge voltage of capacitor/kV
0	-1.00	10.0	—
40	-2.01	10.7	-11.4
80	-2.44	12.2	-12.9
120	-2.67	13.8	-14.6
140	-2.76	14.6	-15.4
160	-2.82	15.8	-16.2

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参考文献(14)

[1]	Zheng Jinxing, Liu Xufeng, Song Yuntao, et al. Concept design of CFETR superconducting magnet system based on different maintenance ports[J]. Fusion Engineering and Design, 2013, 88(11): 2960-2966. doi: 10.1016/j.fusengdes.2013.06.008
[2]	Song Yuntao, Wu Songtao, Wan Baonian, et al. Concept design of CFETR tokamak machine[J]. IEEE Trans Plasma Science, 2013, 88(11): 2960-2966. https://ieeexplore.ieee.org/document/6635362
[3]	Wan Yuanxi. Design and strategy for CFETR[C]//Proc IEEE 25th Symp Fusion Eng. 2013.
[4]	Fu Peng, Song Zhiquan, Gao Ge. Quench protection of the poloidal field superconducting coil system for the EAST tokamak[J]. Nuclear Fusion, 2006, 46(3): S85-S89. doi: 10.1088/0029-5515/46/3/S11
[5]	Gaio E, Maistrello A, Barp M. Full scale prototype of the JT-60SA quench protection circuits[J]. Fusion Engineering and Design, 2013, 88(6/8): 563-567. https://www.sciencedirect.com/science/article/pii/S0920379613001981
[6]	Song I, Roshal A, Tanchuk V, et al. The fast discharge system of ITER superconducting magnets[C]//Proc of International Conference on Electrical Machines and Systems (ICEMS) Conference. 2011: 1-6.
[7]	宋执权. EAST超导托卡马克极向场电源失超保护系统的研制[D]. 北京: 中国科学院研究生院, 2007. Song Zhiquan. Research and development of quench protection system in poloidal field power supply system for EAST super-conductive Tokamak. Beijing: Graduate University of Chinese Academy of Sciences, 2007
[8]	Bonicelli T, Lorenzi A D, Hrabal D, et al. The European development of a full scale switching unit for the ITER switching and discharging networks[J]. Fusion Engineering and Design, 2005, 75/79(11): 193-200. https://www.sciencedirect.com/science/article/pii/S0920379605003108
[9]	Choi J H, Yang H L, Ahn H S. Overview of superconducting magnet power supply system for the KSTAR 1st plasma experiment[J]. Nuclear Engineering and Technology, 2008, 40(6): 459-466. doi: 10.5516/NET.2008.40.6.459
[10]	王建华, 耿英三, 刘志远. 输电等级单断口真空断路器理论及其技术[M]. 北京: 机械工业出版社, 2016. Wang Jianhua, Geng Yingsan, Liu Zhiyuan. The theory and technology on electrical transmission voltage level single break vacuum interrupter. Beijing: China Machine Press, 2016
[11]	温家良, 吴锐, 彭畅, 等. 直流电网在中国的应用前景分析[J]. 中国电机工程学报, 2012, 32(13): 7-12. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGDC201213001.htm Wen Jialiang, Wu Rui, Peng Chang, et al. Analysis of DC grid prospects in China. Proceedings of the CSEE, 2012, 32(13): 7-12 https://www.cnki.com.cn/Article/CJFDTOTAL-ZGDC201213001.htm
[12]	温家良, 汤广福, 查鲲鹏, 等. 高压晶闸管阀运行试验方法与试验装置的研究与开发[J]. 电网技术, 2006, 32(21): 26-31. https://www.cnki.com.cn/Article/CJFDTOTAL-DWJS200621007.htm Wen Jialiang, Tang Guangfu, Zha Kunpeng, et al. Operational test method of high voltage thyristor valves and development of its synthetic test equipment. Power System Technology, 2006, 32(21): 26-31 https://www.cnki.com.cn/Article/CJFDTOTAL-DWJS200621007.htm
[13]	Bareyt B. A 170-kA DC circuit breaker for the quench protection of central solenoid coil of the ITER tokamak[J]. Fusion Engineering and Design, 2000, 54(1): 49-61. https://www.sciencedirect.com/science/article/pii/S092037960000106X
[14]	Fridman B, Enikeev R S, Kharcheva K, et al. Counter pulse bank for 70 kA, 10 kV commutation system[C]//Pulse Power Conference. 2013: 1-6.