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Two sets of super-synchronization speed control assemblies for two 80 MVA motor-generator units have been developed successfully in order to satisfy the demand of the toroidalfield system in the HL-2A tokamak.Based on the three-phase logical no-circumfluence a.c./a.c.cycloconverter,the speeds of two 2500 kW double fed drive motors have been regulated by meansof the vector control technology.The maximum operating speed of each motor-generator unithas been raised from 1488 rpm(revolutions per minute)to 1650 rpm and the released energy ofeach unit during a pulsed discharge can reach 500 MJ.As a result,the toroidal field system hasthe capacity to provide 2.8 tesla(T)in HL-2A experiments.
Two sets of super-synchronization speed control assemblies for two 80 MVA motor-generator units have been developed successfully in order to satisfy the demand of the toroidal field system in the HL-2A tokamak. Based on the three-phase logical no-circumfluence ac / accycloconverter, the speeds of two 2500 kW double fed drive motors have been regulated by means of the vector control technology. The maximum operating speed of each motor-generator unit has been raised from 1488 rpm (revolutions per minute) to 1650 rpm and the released energy ofeach unit during a pulsed discharge can reach 500 MJ.As a result of the toroidal field system hasthe capacity to provide 2.8 tesla (T) in HL-2A experiments.