高功率聚变磁体电源桥臂直通故障分析及仿真

doi:10.16568/j.0254-6086.202301003

核聚变与等离子体物理 ›› 2023, Vol. 43 ›› Issue (1): 12-17.DOI: 10.16568/j.0254-6086.202301003

高功率聚变磁体电源桥臂直通故障分析及仿真

王震 1, 2，何诗英*1，黄连生 1, 2，陈晓娇 1 ，陈涛 1, 2，王振尚 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，合肥 230026)

收稿日期:2021-02-26 修回日期:2022-12-25 出版日期:2023-03-15 发布日期:2023-03-20
作者简介:王震(1995−)，男，安徽宿州人，硕士研究生，从事变流器故障分析及保护方案研究。
基金资助:
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)

Fault analysis and simulation of the short circuit in high-power fusion magnet power supply

WANG Zhen1, 2, HE Shi-ying1 , HUANG Lian-sheng1, 2, CHEN Xiao-jiao1 , CHEN Tao1, 2, WANG Zhen-shang1, 2

(1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031; 2. University of Science and Technology of China, Hefei 230026)

Received:2021-02-26 Revised:2022-12-25 Online:2023-03-15 Published:2023-03-20

摘要/Abstract

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。

关键词: 聚变磁体电源；三电平变流器；IGCT；故障分析

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.

Key words: Fusion magnet power supply, Three-level converter, IGCT, Fault analysis

中图分类号:

TM461

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.

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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高功率聚变磁体电源桥臂直通故障分析及仿真

Fault analysis and simulation of the short circuit in high-power fusion magnet power supply

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