Journal of Electrical Engineering and Technology

The Korean Institute of Electrical Engineers (대한전기학회)
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Parameter Estimation Method of Low-Frequency Oscillating Signals Using Discrete Fourier Transforms

  • 투고 : 2011.03.21
  • 심사 : 2011.11.15
  • 발행 : 2012.03.01
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초록

This paper presents a DFT (Discrete Fourier Transform) based estimation algorithm for the parameters of a low-frequency oscillating signal. The proposed method estimates the parameters, i.e., the frequency, the damping factor, the mode amplitude, and the phase, by fitting a discrete Fourier spectrum with an exponentially damped cosine function. Parameter estimation algorithms that consider the spectrum leakage of the discrete Fourier spectrum are introduced. The multi-domain mode test functions are tested in order to verify the accuracy and efficiency of the proposed method. The results show that the proposed algorithms are highly applicable to the practical computation of low-frequency parameter estimations based on DFTs.

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참고문헌

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피인용 문헌

  1. Power system low frequency oscillation mode estimation using wide area measurement systems vol.20, pp.2, 2017, https://doi.org/10.1016/j.jestch.2016.11.019