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电网技术  2011 

华北—华中—华东特高压联网大区模式下低频振荡模式的频率特性

, PP. 15-20

Keywords: 动态稳定,主导振荡模式,频率特性

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Abstract:

以“三华”联网工程为背景,研究了“三华”互联电网低频振荡模式的频率特性。首先以实际网络特性为基础,建立了“三华”联网等值系统模型,并使用实际电网试验数据验证了等值系统的有效性和精度。基于“三华”联网等值系统,使用理论分析与数值仿真相结合的方法研究了“三华”电网主导振荡模式的频率特性及影响因素。研究结果表明系统规模及联网区域的不断发展是导致主导模式振荡频率下降的根本原因。励磁绕组、发电机励磁系统、电力系统稳定器是使主导模式振荡频率进一步下降的重要因素。

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