On Fault Prediction for Wind Turbine Pitch System Using Radar Chart and Support Vector Machine Approach

Cheng Xiao, Zuojun Liu, Tieling Zhang and Lei Zhang
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Cheng Xiao: School of Control Science and Engineering, Hebei University of Technology, Tianjin 300131, China
Zuojun Liu: School of Control Science and Engineering, Hebei University of Technology, Tianjin 300131, China
Tieling Zhang: Faculty of Engineering and Information Sciences, University of Wollongong, Wollongong, NSW 2522, Australia
Lei Zhang: School of Control Science and Engineering, Hebei University of Technology, Tianjin 300131, China

Energies, 2019, vol. 12, issue 14, 1-18

Abstract: In order to reduce operation and maintenance cost and improve fault diagnosis and detection accuracy for wind turbines, a study on advanced methods has been carried out. The purpose of this paper is to present a new method developed using radar chart and support vector machine (SVM) approach for fault diagnosis and prediction of wind turbine pitch system as it usually has a higher failure rate. In the study, the supervisory control and data acquisition (SCADA) system data are utilized as source data for SVM prediction. First of all, the characteristics of the indicator variable data collected by the SCADA system are analyzed, and the radar charts corresponding to the normal and faulty operation of the wind turbine pitch system are constructed using the indicator variable data. Secondly, the SVM method is used to extract the gray-level co-occurrence matrix (GLCM) features and histogram of oriented gradients (HOG) features of the radar charts, and the SVM classifier is trained. Then, the operational status is predicted, the classification effect is evaluated by the confusion matrix, and the prediction evaluation index is calculated. Thirdly, the support vector regression method is used to analyze the SCADA indicator variable data, the input and output of the regression model are determined, and the training prediction model is established, and the prediction accuracy of the test model is analyzed using the test sample data. Finally, the forecasting evaluation indexes obtained by the above two methods are compared. It proves that the proposed method using SVM to analyze the system radar charts has a higher prediction accuracy of 91.24% than the support vector regression method. The prediction accuracy is improved by 8.6%. Hence, it is verified that the new method using a radar chart and SVM approach has superiority over the support vector regression method.

Keywords: fault prediction; wind turbine pitch system; radar chart; support vector machine; support vector regression (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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