In large interconnected power system, there have been spontaneous system oscillations at verylowfrequencies.
在大型电力系统中存在有自生的甚低频系统振荡。
2
At verylowfrequencies, the contribution from the vector potential to the impedance matrix is much smaller than the contribution from the scalar potential.
当频率很低时,阻抗矩阵中矢量磁位的贡献比标量电位的贡献小得多。
3
Related to the loss of enclosure damping, ported and dual-reflex bandpass designs also exhibit higher distortion levels at verylowfrequencies than sealed or single-reflex bandpass designs.