摘要
针对HT 7U装置等离子体位移快控电源大电流快速响应要求,提出了一种基于电流型变流器的快控电源(FCPS)设计新方案。该方案采用交 直 交拓扑结构,即网侧采用电流型PWP整流器设计,以获得稳定的直流电流及网侧单位功率因数正弦波电流控制;负载侧则采用电流型H桥逆变器设计以实现负载电流的快速跟踪控制。移相PWM控制策略在实现多组变流器并联运行的同时,提高了变流器的等效开关频率控制,从而改善了电流波形品质。模拟系统实验论证了方案的正确性。
A novel design scheme based on the current converter is presented to meet the need of larger current control for the plasma displacement fast control power supply (FCPS) in the HT-7U tokmak ,which is composed of ac-dc-ac current source converters. In the side of grid, the topology of paralleled current source PWM rectifiers is adopted to take its input current in an approximately sinusoidal waveform and its power factor to 1. In the side of load-wire, the topology of paralleled current source H-bridge inverters is adopted to obtain fast current tracking response. By using the phase-shift-PWM control which is apt to multi-converters parallel, the equal switch-frequency of the converters is enhanced and the current control performance of FCPS is improved. The simulation experimental results confirm the validity of the proposed scheme.
出处
《核聚变与等离子体物理》
CAS
CSCD
北大核心
2004年第4期291-296,共6页
Nuclear Fusion and Plasma Physics
基金
九五重大工程资助项目(国计字1998-210)
