Abstract: The regulation module of the high-voltage power supply system for lower hybrid current drive of the China Engineering Test Fusion Reactor (CFETR) is simulated on MATLAB platform. Impact of power grid fluctuations, load changes and filter parameters on the output voltage is analyzed in the static state. The compensation network can greatly reduce the ripple of the output voltage and increase its stability. The stabilization time of the system is within a few milliseconds, and the ripple factor is <1%. The simulation results show that it is reasonable to adopt PID (proportional integral derivative) control and lead-lag compensation strategy for the high-voltage power system regulation module.

Key words: BUCK circuit, Stability, PID control, Feedback control;

摘要： 利用MATLAB对中国聚变工程实验堆(CFETR)低混杂波高压电源系统的调节模块进行仿真，分析了静态电网波动、负载变化、滤波参数等对输出电压的影响。利用补偿网络可以大大减少纹波，增加输出电压的稳定性。该系统的稳定时间在几个毫秒之内，纹波系数<1%。通过仿真决定对该高压电源系统调节模块采用比例积分微分(PID)控制与超前-滞后补偿策略。

关键词: 降压式变换(BUCK)电路, 稳定性, PID控制, 反馈控制