在大型电力系统中存在有自生的甚低频系统振荡。
In large interconnected power system, there have been spontaneous system oscillations at very low frequencies.
现代电力系统规模大，电网结构和特殊运行状况会导致系统内存在区域间振荡现象。
The large dimension, power system's structure and special working status will cause inter-area oscillations.
现代电力系统规模大，电网结构和特殊运行状况会导致系统内存在区域间振荡现象。
The large dimension, power system's structure and special working status will cause inter-area oscillations.
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