Electric Power ›› 2016, Vol. 49 ›› Issue (8): 69-73.DOI: 10.11930/j.issn.1004-9649.2016.08.069.05

• New Energy • Previous Articles     Next Articles

Analysis of Sparse Fourier Transform for Vibration Signal of Wind Turbine Gearbox

ZHAO Hongshan1, GAO Duo2, ZHANG Jianping2   

  1. 1. Electrical and Electronic Engineering Institute, North China Electric Power University, Baoding 071003, China;
    2. State Grid Cangzhou Electric Power Company, Cangzhou 061000, China
  • Received:2016-02-15 Online:2016-08-10 Published:2016-08-12
  • Contact: This work is supported by National Natural Science Foundation of China (No. 51277074).

Abstract: The on-line spectrum analysis for vibration signal of wind turbine gearbox demands fast algorithms. In order to improve the speed of the algorithm, the spectrum analysis with Sparse Fast Fourier Transform (SFFT) algorithm is proposed in this paper. First, the SFFT algorithm is used to leverage the window function to filter vibration signal. Then, after the Fourier coefficients being hashed, the k largest (in magnitude) coefficients of the Fourier Transform of vibration signal can be estimated by locating and estimating methods. The SFFT algorithm has a simple structure and a sub-linear runtime in the signal size n. It has been verified through analyzing the vibration signal of wind turbine gearbox that the SFFT algorithm has a faster performance than FFT algorithm in on-line spectrum analysis.

Key words: wind turbine, gearbox, vibration signal, spectrum analysis, Sparse Fast Fourier Transform

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