Application of improved wavelet denoising method in low-frequency oscillation analysis of power system
Authors:
- Mosi LiuMLMosi Liu
- Zhiyuan SunZSZhiyuan Sun
- Mingpo LiMLMingpo Li
Open Access
- 1 September 2020
- conference paper
- Published by IOP Publishing in Journal of Physics: Conference Series
- Vol. 1633 (1)
Abstract
The Prony algorithm has been widely used in low-frequency oscillation analysis of power system due to its good mathematical characteristics. However, the Prony algorithm is very sensitive to noise and requires a high level of input signal. This paper overcomes the shortcomings of traditional soft and hard threshold denoising methods by improving the threshold and threshold function of wavelet denoising. Using the improved wavelet threshold denoising method to preprocess the sampled signal can effectively improve the anti-interference ability of the Prony algorithm. The simulation experiment is performed with MATLAB and the experimental results show the effectiveness of the improved method.Keywords
This publication has 2 references indexed in Scilit:
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