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中文摘要：
介绍了低频振荡的原理和研究概况,然后利用电力系统分析综合程序PSASP进行系统的小干扰稳定计算,研究励磁系统、发电机电抗和不同干扰对低频振荡的影响。研究发现：高放大倍数快速励磁装置更易引起系统低频振荡;可适当增大系统发电机的电抗以抑制低频振荡,反之亦然;系统的小干扰稳定性与小干扰的类型和大小没有任何关系。
英文摘要：
This paper firstly describes the principle of low frequency oscillation of power system and the general situation of its research,then calculates the small signal stability of the system using PSASP,which means to study the effect of excitation system, generator＇s reactance and different interference to low frequency oscillation.Research found that high magnification rapid excitation device is much easier to cause low frequency oscillation of systems.We can appropriately increase generator＇s reactance to suppress low frequency oscillation,and vice versa;small signal stability of system has nothing to do with the type and size of small signal.
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