| 高功率聚变磁体电源桥臂直通故障分析及仿真 |
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| 引用本文： | 王 震,何诗英,黄连生,陈晓娇,陈 涛,王振尚.高功率聚变磁体电源桥臂直通故障分析及仿真[J].核聚变与等离子体物理,2023,43(1):12-17. |
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| 作者姓名： | 王 震 何诗英 黄连生 陈晓娇 陈 涛 王振尚 |
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| 作者单位： | (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，合肥 230026) |
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| 基金项目： | 国家重点研发计划(2017YFE0300504)；聚变堆主机关键系统综合研究设施(2018-000052-73-01-001228) |
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| 摘 要： | 高功率聚变磁体电源采用三电平中点钳位型(NPC)电压源变流器(VSC)拓扑，在变流器桥臂直通故障情况下，其直流侧电容的充放电使故障暂态过程较为复杂，为变流器故障分析带来挑战。针对这一问题，以3kV、6kA三电平IGCT大功率VSC为背景，建立了桥臂直通故障暂态等效数学模型。将整个故障过程分为直流侧电容放电和二极管导通两个阶段，详细分析了该故障情况下电压及电流的变化趋势，为后期保护方案的设计奠定基础。Matlab仿真结果表明了该分析方法的可靠性。
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| 关 键 词： | 聚变磁体电源 三电平变流器 IGCT 故障分析 |
| 收稿时间： | 2021-02-26 |
Fault analysis and simulation of the short circuit in high-power
fusion magnet power supply |
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| WANG Zhen,HE Shi-ying,HUANG Lian-sheng,CHEN Xiao-jiao,CHEN Tao,WANG Zhen-shang.Fault analysis and simulation of the short circuit in high-power
fusion magnet power supply[J].Nuclear Fusion and Plasma Physics,2023,43(1):12-17. |
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| Authors: | WANG Zhen HE Shi-ying HUANG Lian-sheng CHEN Xiao-jiao CHEN Tao WANG Zhen-shang |
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| Institution: | (1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031;
2. University of Science and Technology of China, Hefei 230026) |
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| Abstract: | The high-power fusion magnet power supply adopts a three-level neutral point clamped (NPC)
voltage source converter (VSC) topology. In the case of the short circuit in converter, the charging and discharging
of the DC side capacitor causes the fault transient process more complex, which brings challenges to the fault
analysis in converter. To solve this problem, based on the background of 3kV and 6kA three-level IGCT
high-power VSC, the fault process is studied by establishing the transient equivalent mathematical model of the
short circuit in converter. The whole fault process is divided into two stages, namely the discharge of the capacitor
on the DC side and the conduction of the diode. The variation trend of voltage and current under fault transient
state is analyzed in detail, which lays the foundation for the design of the later protection scheme. Matlab
simulation results show the reliability of the analysis method. |
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| Keywords: | Fusion magnet power supply Three-level converter IGCT Fault analysis |
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