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《Nuclear Fusion and Plasma Physics》 2009-01
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Operation without circulating current of HL-2A ohmic power supply

WANG Ying-qiao,YAO Lie-ying,XUAN Wei-min(Southwestern Institute of Physics,Chengdu 610041)  
The ohmic power supply of HL-2A tokamak and its operation mode without circulating current are described and the converter status detector is also introduced,which can be used to monitor the status of all thyristors and then to judge the zero-crossing of load current.The disadvantages such as low precision and low reliability of current measurement have been overcome and the response time of this detector reaches 1ms.The volt-second of ohmic transformer(5Vs) is fully used and the plasma current is up to 420kA because of the operation mode without circulating current.
【CateGory Index】: TL825
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