The Power Supply System for HL-2A Tokamak's Magnetic Field

摘要

The highpower pulsed power supply system for the magnetic field of the HL-2A Tokamak is described in this paper.The total output power of its eight magnetic field power supply units of nearly 250 MW.Their highest DC output voltage and current are 3510 V and 45 kA,respectively. All the units are operated in a pulsed mode.The pulse duration is 5 s,and the cyclic period is 15 min.The power supply system consists mainly of pulsed flywheel motor generators,rectifying transformers,thyristor converters,diode rectifiers and switches.The system incorporates many key technologies-supply equalization with two generators and four diode bridges,constant-angle phase triggers with a wide frequency range,current equalization,a status detector for the high current 6-phase converter,and advanced monitoring based on a programmable logic computer and engineering parameter measurement.The experimental results show that the performance of the power supply system satisfies the requirements of HL-2A experiments very well.