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系统振荡事故与短路事故 | 2012-1-3 20:29:00
系统振荡事故与短路事故
电力系统振荡和短路的主要区别是:
(1)振荡时系统各点电压和电流值均作往复性摆动,而短路时电流、电压值是突变的。此外,振荡时电流、电压值的变化速度较慢,而短路时电流、电压值突然变化量很大。
(2)振荡时系统任何一点电流与电压之间的相位角都随功角的变化而改变;而短路时,电流与电压之间的角度是基本不变的。
(3)振荡时系统三相是对称的;而短路时系统可能三相不对称.

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