Journal of Modern Power Systems and Clean Energy

ISSN 2196-5625 CN 32-1884/TK

Fault diagnosis of wind turbine bearing based on stochastic subspace identification and multi-kernel support vector machine
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1. School of Electrical and Electronic Engineering, North China Electric Power University, Baoding, China

Fund Project:

This work was supported by National Key Technology Research and Development Program (No. 2015BAA06B03).

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    Abstract:

    In order to accurately identify a bearing fault on a wind turbine, a novel fault diagnosis method based on stochastic subspace identification (SSI) and multi-kernel support vector machine (MSVM) is proposed. First, the collected vibration signal of the wind turbine bearing is processed by the SSI method to extract fault feature vec_x0002_tors. Then, the MSVM is constructed based on Gauss kernel support vector machine (SVM) and polynomial kernel SVM. Finally, fault feature vectors which indicate the condition of the wind turbine bearing are inputted to the MSVM for fault pattern recognition. The results indicate that the SSI-MSVM method is effective in fault diagnosis for a wind turbine bearing and can successfully identify fault types of bearing and achieve higher diagnostic accuracy than that of K-means clustering, fuzzy means clustering and traditional SVM.

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  • Online: March 08,2019