Power System Frequency Estimation of Sine-Wave Corrupted With Noise by Windowed Three-Point Interpolated DFT

Power System Frequency Estimation of Sine-Wave Corrupted With Noise by Windowed Three-Point Interpolated DFT
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加窗三点插值DFT估计含噪声正弦波的电力系统频率

DOI:
10.1109/tsg.2017.2682098
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发表时间:
2018-09
影响因子:
9.6
通讯作者:
Yao Wenxuan
Yao Wenxuan
中科院分区:
工程技术1区
文献类型:
--
作者:
Wen He;Li Chengcheng;Yao Wenxuan

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本文提出了一种对称三点IpDFT(S3IpDFT)方法,该方法可与所有组合余弦窗相结合。研究了镜像分量和噪声对S3IpDFT频率估计的影响。给出了图像分量光谱干扰引起的归一化频率绝对误差的表达式。推导了频率估计方差的解析表达式。通过计算机仿真和实验验证了所得到的结果。
This paper presents a symmetric three points IpDFT (S3IpDFT) method which can be associated with all combined cosine windows. The influence of spectral interference from image component and noise on the power system frequency estimation provided by the S3IpDFT is investigated. The expression for the absolute error of the normalized frequency caused by the spectral interference from image component is presented. Also, the analytical expression of the frequency estimation variance has been derived. The derived results are validated by means of computer simulations and experiments.
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