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基于频域动态模型的同步相量测量算法

DOI: 10.13334/j.0258-8013.pcsee.2015.06.011, PP. 1371-1378

Keywords: 频域模型,基波分量,动态相量测量,低频振荡,频率偏移

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Abstract:

考虑到电力信号的动态特性,电力信号基波分量的幅值与频率也可能随时间变化。基于频域动态模型,提出一种利用同一数据窗对不同频点滤波器的响应来修正离散傅里叶变换法(discreteFouriertransform,DFT)估计结果的同步相量测量算法,分别应用理想信号以及PSCAD/EMTDC仿真信号来检验算法的性能。仿真结果表明,虽然需要增加有限的运算量,但与以往算法相比,所提出算法在低频振荡、频率偏移等动态条件下,能够消除或减弱电力信号基波分量的时变性并大大提高信号的相量测量精度。

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