Abstract:

In order to improve the physical experimental parameters of the HL-2A tokamak, the new high-power supply for the auxiliary heating systems need higher stability, faster response, higher power factor, shorter protective time, higher voltage, more flexible control, higher frequency and much less energy discharged to this equipment than the old one when the load is arcing. The high voltage power supply adopts the pulse step modulation (PSM) technology and mainly consists of 28 modules with 4 adjustable modules and 24 uncontrollable switch modules connected in series. The output voltage can be adjusted continuously in 0~20kV and the switch frequency maximum can reach 20 kHz. The results of simulation and experiment show that the operating parameters of the power supply can reach 20kV/200A and meet the experimental requirements.

Key words: Auxiliary heating, High frequency high voltage power supply, Pulse step modulation technology, Power supply module

摘要：

对HL-2A 装置原有的高压电源进行了高频化改造，改造后的单元电源采用脉冲步进阶梯调制(PSM)技术，采用24 个不可控整流电源模块与4 个调节电源模块串联输出，通过控制各模块的投入切出，使输出电压范围在0~20kV 可调，模块开关频率最高可以达到20kHz。通过仿真和实验测试结果表明，该电源运行参数可以达到20kV/200A，开关频率最高达到了20kHz，能够满足系统的实验需求。

关键词: 二级加热, 高频高压电源, 脉冲步进阶梯调制技术, 电源模块