ITER极向场变流器电源短路故障分析

Short circuit fault analysis of ITER poloidal field converter power supply

ITER(international thermonuclear experimental rector)极向场电源系统是ITER磁体电源系统的重要组成部分。它由晶闸管相控变流器向极向场超导线圈供电,实现各种不同运行模式下等离子体的产生、加热、平衡与控制。通过利用PSCAD(power system computer aided design)软件建立了极向场变流器电源系统的仿真模型,并利用该模型对变流器电源系统进行了各种主要短路故障的分析,得出各种短路故障的电流峰值,并总结了短路故障的分析结果。这些分析结果可为今后变流器的结构设计和短路故障保护的研究提供重要的依据和参考。

The poloidal field power supply system was an important part of ITER （international thermonuclear experimental rector） magnet power supply system. The power was provided to the poloidal field coils for plasma initiation, heating, plasma current shape and position control in different operation modes. The short-circuit fault of the poloidal field converter power system was analyzed. The simulation model of the PF converter power supply was built up by using the PSCAD （power system computer aided design） software, and the detailed short circuit fault analysis was carried out based on this model. All kinds of short circuit fault peak current were got, and short circuit fault analysis results were summarized. These results were important basis and reference for the converter structure design and fault protection studies.