Analysis and Design of ITER 1 MV Core Snubber  

作　　者：王海田 李格 

机构地区：[1]China Electric Power Research Institute [2]Institute of Plasma Physics,Chinese Academy of Sciences

出　　处：《Plasma Science and Technology》2012年第11期1017-1023,共7页等离子体科学和技术（英文版）

基　　金：supported by National Program on Key Basic Research Project of ITER Core Snubber in China (973 Program) (No.2010GB108003)

摘　　要：The core snubber, as a passive protection device, can suppress arc current and absorb stored energy in stray capacitance during the electrical breakdown in accelerating electrodes of ITER NBI. In order to design the core snubber of ITER, the control parameters of the arc peak current have been firstly analyzed by the Fink-Baker-Owren （FBO） method, which are used for designing the DIIID 100 kV snubber. The B-H curve can be derived from the measured voltage and current waveforms, and the hysteresis loss of the core snubber can be derived using the revised parallelogram method. The core snubber can be a simplified representation as an equivalent parallel resistance and inductance, which has been neglected by the FBO method. A simulation code including the parallel equivalent resistance and inductance has been set up. The simulation and experiments result in dramatically large arc shorting currents due to the parallel inductance effect. The case shows that the core snubber utilizing the FBO method gives more compact design.The core snubber, as a passive protection device, can suppress arc current and absorb stored energy in stray capacitance during the electrical breakdown in accelerating electrodes of ITER NBI. In order to design the core snubber of ITER, the control parameters of the arc peak current have been firstly analyzed by the Fink-Baker-Owren （FBO） method, which are used for designing the DIIID 100 kV snubber. The B-H curve can be derived from the measured voltage and current waveforms, and the hysteresis loss of the core snubber can be derived using the revised parallelogram method. The core snubber can be a simplified representation as an equivalent parallel resistance and inductance, which has been neglected by the FBO method. A simulation code including the parallel equivalent resistance and inductance has been set up. The simulation and experiments result in dramatically large arc shorting currents due to the parallel inductance effect. The case shows that the core snubber utilizing the FBO method gives more compact design.

关 键 词：international thermonuclear experimental reactor （ITER） neutral beam injector （NBI） B-H curve core snubber eddy current arc current eddy current loss hysteresislOSS 

分 类 号：TL629.1[核科学技术—核技术及应用]