ABNORMAL DETECTION OF WIND TURBINE CONVERTER BASED ON CWGANGP-CSSVM

Mingzhu Tang, Jun Tang (), Huawei Wu, Yang Wang, Yiyun Hu (), Beiyuan Liu (), Madini O. Alassafi (), Fawaz E. Alsaadi (), Adil M. Ahmad () and Fuqiang Xiong
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Mingzhu Tang: College of Energy and Power Engineering, Changsha University of Science & Technology, Changsha 410114, P. R. China
Jun Tang: College of Energy and Power Engineering, Changsha University of Science & Technology, Changsha 410114, P. R. China
Huawei Wu: ��Hubei Key Laboratory of Power System Design and Test for Electrical Vehicle, Hubei University of Arts and Science, Xiangyang 441053, P. R. China
Yang Wang: ��School of Electric Engineering, Shanghai Dianji University, Shanghai 201306, P. R. China§State Key Laboratory of Industrial Control Technology, Institute of Industrial Process Control, College of Control Science and Engineering, Zhejiang University, Hangzhou 310058, P. R. China
Yiyun Hu: �Department of Mathematics, University of Washington, 4710 20th Ave NE Seattle, WA 98105, USA
Beiyuan Liu: College of Energy and Power Engineering, Changsha University of Science & Technology, Changsha 410114, P. R. China
Madini O. Alassafi: ��Department of Information Technology, Faculty of Computing and Information Technology, King AbdulAziz University, Jeddah 21589, Saudi Arabia
Fawaz E. Alsaadi: ��Department of Information Technology, Faculty of Computing and Information Technology, King AbdulAziz University, Jeddah 21589, Saudi Arabia
Adil M. Ahmad: ��Department of Information Technology, Faculty of Computing and Information Technology, King AbdulAziz University, Jeddah 21589, Saudi Arabia
Fuqiang Xiong: *State Grid Hunan Extra High Voltage Substation Company, Changsha 410029, P. R. China††Substation Intelligent Operation and Inspection Laboratory of State Grid Hunan Electric Power Co., Ltd., Changsha 410029, P. R. China

FRACTALS (fractals), 2023, vol. 31, issue 06, 1-15

Abstract: Abnormal detection of wind turbine converter (WT) is one of the key technologies to ensure long-term stable operation and safe power generation of WT. The number of normal samples in the SCADA data of WT converter operation is much larger than the number of abnormal samples. In order to solve the problem of low abnormal data and low recognition rate of WTs, we propose a sample enhancement method for WT abnormality detection based on an improved conditional Wasserstein generative adversarial network. Since the anomaly samples of WT converters are few and difficult to obtain, the CWGANGP oversampling method is constructed to increase the anomaly samples in the WT converter dataset. The method adds additional category labels to the inputs of the generative and discriminative models of the generative adversarial network, constrains the generative model to generate few types of anomalous samples, and enhances the generative model’s ability to generate few types of anomalous samples, enabling data generation in a prescribed direction. The smooth continuous Wasserstein distance is used instead of JS divergence as a distance metric to measure the probability distribution of real and generated data in the conditional generative response network and reduce pattern collapse. The gradient constraint is added to the CWGANGP model to enhance the convergence of the WGAN model, so that the generative model can synthesize minority class anomalous samples more effectively and accurately under the condition of unbalanced sample data categories. The quality of anomalous sample generation is also improved. Finally, the anomaly detection is made on the actual operating variator dataset for the unbalanced dataset and the dataset after reaching Nash equilibrium. The experimental results show that the method used in this paper has lower MAR and FAR in WT converter anomaly detection compared with other oversampling data balance optimization methods such as SMOTE, RandomOverSampler, GAN, etc. The method can be well implemented for anomaly detection of large wind turbines and can be better applied in WT intelligent systems.

Keywords: Converter; Category Imbalance; Abnormal Detection; CWGANGP Model; Cost-Sensitive Support Vector Machine (search for similar items in EconPapers)
Date: 2023
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DOI: 10.1142/S0218348X23401394

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