本文提出了用“频谱分析”的方法分析外部扰动引起的电力系统随机振荡，并建立了完整的数学模型。
This paper puts forward a "Spectrum Analysis" method to analyse the random power oscillation in power system caused by external disturbance, and sets up a complete digital model.
断线事故会引起整个输电系统的振荡，甚至导致输电塔倒塌及产生火灾等次生灾害。
The vibration caused by the broken wire may make the transmission line system vibrate and the tower collapse, and even lead to fire accidents.
电力系统强迫功率振荡为持续的周期性小扰动所引起低频振荡现象。
Power System forced power oscillation is a kind of low frequency oscillation caused by persistent periodic small disturbance.
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