晶闸管旁通装置在EAST极向场电源中的应用

Application of thyristor bypass in poloidal field power supply system of EAST

EAST极向场电源对全超导、大电感线圈提供峰值达±15 kA的电流。为防止过电压,必须为超导线圈上的电流提供续流回路,一旦电源出现故障,旁通作为故障保护系统的重要组成部分,将为超导线圈上提供一条续流通道,避免过电压的产生,保护整个电源系统。提出在EAST极向场电源系统中得到应用的旁通装置,并对旁通的工作特性予以分析,最后指出此类旁通设计中应注意的若干问题。

The poloidal field power supply system of EAST supplied the current of ±15 kA peak value for the allsuperconducting and large inductance coil.For preventing over-voltages,there must be a freewheeling loop of the superconducting coil.Once there were faults in the supply system,the bypass which played an important role in the protecting system would supply a freewheeling loop for the superconducting coil to prevent over-voltages,and protect the supply system.The bypass which was applied in the poloidal field power supply system of EAST was introduced,and the operating characteristics were analyzed in this paper.Finally,some tips should be noted in the design process of this kind of bypass were proposed.