整流变压器偏磁对托卡马克电源系统谐波不稳定的分析

  目的  为了有效地抑制托卡马克电源系统中非特征次谐波对电网的扰动，研究了托卡马克电源系统低频谐波产生的机理。  方法  通过引入一种改进型的开关函数模型，并选取国际热核聚变实验反应堆(ITER)聚变装置为例，结合其相应的参数建立了其对应的交直流等效电路模型，并通过计算和仿真得到对应的输出2次谐波情况。  结果  通过计算得到输出量与输入量的比值稳定因子值几乎趋向于零。  结论  通过这一计算与仿真结果，可以确定整流变压器直流偏磁不会引起系统的谐波不稳定。

Analysis of Harmonic Instability of Tokamak Power System Caused by Rectifier Transformer Bias

  Introduction  The paper aims to effectively suppress the disturbance of non characteristic harmonics to the power grid in the tokamak power supply system, the paper studies the mechanism of low-frequency harmonics in the tokamak power supply system.   Method  By introducing an improved switching function model, selected ITER fusion device as an example and established its corresponding AC/DC equivalent circuit model combined with its corresponding parameters, the corresponding output second harmonic was obtained through calculation and simulation.   Result  The ratio of output to input is calculated, and the stability factor value almost tends to zero.   Conclusion  It is determined that the DC bias of rectifier transformer do not cause harmonic instability of the system.