基于改进Prony法的电力系统低频振荡快衰分量辨识
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牟建伟,尚亚男,刘文刚,戴思源,江澎,王保力,王延勃
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An Identification Method Based on Improved Prony for Fast Attenuate Component of the Power System Low-Frequency Oscillation
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Mu Jianwei,Shang Yanan,Liu Wengang,Dai Siyuan,Jiang Peng,Wang baili,Wang Yanbo
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表3 Givens变换方法的分段和不分段计算结果比较
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Tab.3 Comparison of the results of the segmentation and the whole calculation of the Givens transform method
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| 分量序号 | 方法 | 频率f/Hz | 衰减因子α | 幅值A | 初相θ/(°) | | 1 | 分段 | 0.423 0 | -0.002 7 | 10.000 0 | 110.000 0 | | 不分段 | 0.423 0 | -0.002 7 | 10.000 0 | 110.000 0 | | 2 | 分段 | 0.420 0 | -0.265 2 | 2.000 0 | 13.000 0 | | 不分段 | 0.420 0 | -0.265 2 | 2.000 0 | 13.000 0 | | 3 | 分段 | 0.247 3 | -0.031 1 | 10.000 0 | 20.000 0 | | 不分段 | 0.247 3 | -0.031 1 | 10.000 0 | 20.000 0 | | 4 | 分段 | 1.034 9 | -0.293 6 | 1.000 0 | 60.000 0 | | 不分段 | 1.0349 | -0.2936 | 1.0000 | 60.000 0 | | 5 | 分段 | 2.400 0 | -45.878 7 | 5.800 1 | 9.999 1 | | 不分段 | 2.426 6 | -46.663 1 | 7.693 8 | 4.600 2 | | 6 | 分段 | 0.900 0 | -55.115 8 | 6.300 1 | 60.002 8 | | 不分段 | – | – | – | – |
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