中国散裂中子源大功率可编程脉冲电源设计

Design of programmable pulsed high power supply for China spallation neutron source

在中国散裂中子源大功率可编程脉冲电源设计中,主回路采用绝缘栅双极型晶体管(IGBT)H桥串并联拓扑,错相工作方式,利用IGBT功率放大的特性,实现了电源高功率(60 MW)、高频率(1.843 2MHz)、高压(3.319 kV)和大电流(18 kA)的要求,并通过电源反馈控制系统,实现了电源的快速响应时间,使电源跟踪精度达到1.5%,满足指标要求。在电源研制中,解决了IGBT高压、大电流的均压和均流问题;由于IGBT工作在开关状态,为了消除谐波,利用多重化技术,得到了光滑的输出脉冲电流曲线;采用电流互感器的并联,实现了输出大电流的检测;电源的反馈控制策略采用比例和前馈运算,实现了电源输出波形对给定波形的快速跟踪。

The injection system for the China spallation neutron source（CSNS） rapid cycling synchrotron（RCS） needs two pulsed power supplies bump horizontal power supply（BHPS） and bump vertical power supply（BVPS） to eight painting bump magnets,both of which are programmable pulsed high power supplies.The prototype of the power supplies has been developed.It adopted the insulated gate bipolar transistor（IGBT） H-bridge configuration in a series and parallel topology and phase shifted operating mode in the main circuit,and could output a high power of about 60 MW（3.319 kV,18 kA） with the equivalent frequency of IGBT topology of 1.843 2 MHz.The problem of average voltage and current in the IGBT has been solved.The prototype adopted an optimized feedback control strategy to achieve high speed response with a tracking precision of 1.5%.Multiprocessing was employed to eliminate harmonics in the pulse current,and the current transducers in parallel were used to detect the output current.