Development of power supply system of EXL-50U magnet coils

Junhong CHEN; Yi WU; Yingqiao WANG; Weibin LI; Yuhong CHEN; Yali WANG; Xiaopeng ZHANG; Xue ZHENG; Chunguang ZHANG; Weimin XUAN; Lieying YAO; Hao TAN; Wenwu LUO; Peihai ZHOU; Xianming SONG; Shaoxuan LIU; Zequn SUN; Zijian CONG; Enwu YANG; Xingxin GE; Xiang GAO

doi:10.11889/j.0253-3219.2024.hjs.47.050013

NUCLEAR TECHNIQUES, Volume. 47, Issue 5, 050013(2024)

Development of power supply system of EXL-50U magnet coils

Junhong CHEN¹, Yi WU^1、*, Yingqiao WANG¹, Weibin LI¹, Yuhong CHEN¹, Yali WANG¹, Xiaopeng ZHANG¹, Xue ZHENG¹, Chunguang ZHANG¹, Weimin XUAN¹, Lieying YAO¹, Hao TAN¹, Wenwu LUO^2,3, Peihai ZHOU^2,3, Xianming SONG^2,3, Shaoxuan LIU^2,3, Zequn SUN^2,3, Zijian CONG^2,3, Enwu YANG^2,3, Xingxin GE^2,3, and Xiang GAO^2,3

Author Affiliations

¹Center for Fusion Science, Southwestern Institute of Physics, Chengdu 610041, China

²ENN Science and Technology Development Co., Ltd, Langfang 065001, China

³Hebei Key Laboratory of Compact Fusion, Langfang 065001, China

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Figures & Tables(16)

Fig. 1. Current and voltage waveforms of different configurations (a) Single-null, (b) double-null, (c) snowflake

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Fig. 2. Power supply system diagram

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Fig. 3. 12-pulse (a) and 24-pulse (b) scheme for TF power supply

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Fig. 4. Current harmonics between 12-pulse and 24-pulse schemes for TF power supply

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Fig. 5. 12-pulse scheme for CS and PF power supply

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Fig. 6. Control diagram of power system

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Fig. 7. Actual current waveforms of TF (a) and CS (b) power supply

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Fig. 8. Actual current waveforms of magnetic coils power supplies (a) Shot:1615, (b) Shot:1731, (c) Shot:1638

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Fig. 9. current waveforms of magnetic power supplies (shot:1968) (a) Plasma current and TF coil current, (b) CS coil current, (c) PF coils current

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Table 1. Comparison of parameters of EXL-50 and EXL-50U

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Table 1. Comparison of parameters of EXL-50 and EXL-50U

参数Parameters	EXL-50	EXL-50U
中心离子温度T_i Center ion temperature T_i / keV	1.0	6.0
中心密度n_e Center density n_e / m^-3	2.0×10¹⁹	1.0×10²⁰
磁场B₀ Magnetic field B₀ / T	0.46	1.2
大半径R₀ Major radius R₀ / m	0.58	0.73
环径比A Aspect ratio A	1.4	1.7
等离子体电流I_p Plasma current I_p / MA	0.5	0.9

Table 2. Parameters of EXL-50U magnetic field power supplies
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Table 2. Parameters of EXL-50U magnetic field power supplies
电源名称Power supply TF CS PF1/PF2 PF3/PF4 PF5/PF6 PF7/PF8 PF9/PF10
电压Voltage / V 500 ±1 500 ±400 ±300 ±300 ±600 600
电流Current / kA 150 ±40 ±13 ±16 ±16 ±13 16

Table 3. Parameters of MG100
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Table 3. Parameters of MG100
额定电压Rated voltage / kV 额定电流Rated current / kA 额定功率Rated power / MVA 额定频率Rated frequency / Hz 发电机转速Generator speed / r∙min^-1
2×3 2×12.4 100 100~66 6 000~3 960

Table 4. Parameters of TF transformers

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Table 4. Parameters of TF transformers

变压器移相角度

Transformer phased angle / (°)

频率Frequency / Hz

额定脉冲容量Rated pulse capacity / MVA

额定线电压Rated line voltage / V

额定线电流Rated line current / kA

绕组Windings

±22.5，±7.5

100~66

21.4

3 000/383

4.5/32.7

Table 5. Parameters of MG125
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Table 5. Parameters of MG125
额定电压Rated voltage / kV 额定电流Rated current / kA 额定功率Rated power / MVA 额定频率Rated frequency / Hz 发电机转速Generator speed / r∙min^-1
2×3 2×12 125 100~80 3 000~2 400

Table 6. Parameters of CS, PF transformers

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Table 6. Parameters of CS, PF transformers

电源Power supply	变压器移相角度 Transformer phased angle / (°)	频率Frequency / Hz	额定脉冲容量Rated pulse capacity / MVA	额定线电压Rated line voltage / V	额定线电流Rated line current / kA	绕组Windings
CS	±15	100~80	16.1	3 000/1 137	3.1/8.2	2
PF1-2	±15	100~80	5.6/2.8/2.8	3 000/303/303	1.1/5.3/5.3	3
PF3-6	±15	100~80	5.2/2.6/2.6	3 000/225/225	1.0/6.7/6.7
PF7-8	±15	100~80	8.4/4.2/4.2	3 000/455/455	1.6/5.3/5.3
PF9-10	±15	100~80	10.3/5.2/5.2	3 000/455/455	2.0/6.5/6.5

Table 7. Classification of fault, warning

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Table 7. Classification of fault, warning

类型Type

信号名称

Signals name

信号来源

Signals source

事故

Fault

变压器原边交流过流

AC overcurrent of primary side from transformers

交流开关柜内电流互感器

Current transformers from AC switchgear

变压器副边交流过流AC overcurrent of secondary side from transformers

变流器柜内电流互感器

Current transformers from converters

变流器单桥直流过流

DC overcurrent of single bridge from converters

变流器柜内电流传感器

Current sensors from converters

电源输出总直流过流DC overcurrent of current summation from converters

变流器柜内电流传感器

Current sensors from converters

变压器过温

Over temperature of transformers

变压器内部温度传感器

Temperature sensors from transformers

急停按钮

Stop signal

控制室的急停按钮

Stop button from center control

警告

Warning

变压器副边交流过压

AC overvoltage of secondary side from transformers

变流器柜内交流电压传感器

AC voltage sensors from converters

变流器单桥直流过压

DC overvoltage of single bridge from converters

变流器柜内直流电压传感器

DC voltage sensors from converters

电源输出总直流过压

DC overvoltage of converters

变流器柜内直流电压传感器

DC voltage sensors from converters

熔断器故障

Fuse signal

快熔指示开关

Fuse buttons

桥臂过温

Over temperature of bridge arms

母排温度传感器

Temperature sensors from bus

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Junhong CHEN, Yi WU, Yingqiao WANG, Weibin LI, Yuhong CHEN, Yali WANG, Xiaopeng ZHANG, Xue ZHENG, Chunguang ZHANG, Weimin XUAN, Lieying YAO, Hao TAN, Wenwu LUO, Peihai ZHOU, Xianming SONG, Shaoxuan LIU, Zequn SUN, Zijian CONG, Enwu YANG, Xingxin GE, Xiang GAO. Development of power supply system of EXL-50U magnet coils[J]. NUCLEAR TECHNIQUES, 2024, 47(5): 050013

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