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A Cluster-Based Filtering Approach to SCADA Data Preprocessing for Wind Turbine Condition Monitoring and Fault Detection

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Publicado en:Energies vol. 18, no. 22 (2025), p. 5954-5975
Autor principal: Kijanowski Krzysztof
Otros Autores: Barszcz Tomasz, Dao Phong Ba
Publicado:
MDPI AG
Materias:
Turbines
Machine learning
Nuclear energy
Software
Accuracy
Failure
Wind power
Hypothesis testing
Electricity
Fault diagnosis
Costs
Wind farms
Statistical process control
Neural networks
Sensors
Control charts
Renewable resources
Alternative energy sources
Energy resources
Nuclear power plants
Statistical methods
Hydroelectric power
Statistical analysis
Acceso en línea:Citation/Abstract
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Resumen:The high cost of wind turbine maintenance has intensified the need for reliable fault detection and condition monitoring methods. While Supervisory Control and Data Acquisition (SCADA) systems provide valuable operational data, the raw signals often contain noise, outliers, and missing or redundant entries, which can compromise analysis accuracy. This study presents a novel cluster-based outlier removal approach for SCADA data preprocessing, featuring a unique flexibility to include or exclude negative power values—a factor rarely investigated but potentially critical for fault detection performance. The method applies the K-Means++ unsupervised clustering algorithm to group data points along the wind speed–power curve. The number of clusters is determined heuristically using the elbow method, while outliers are identified through Mahalanobis distance with thresholds derived from Chebyshev’s inequality theorem. The approach was validated using SCADA data from a wind farm in Portugal and further assessed with a CUSUM test-based structural change detection method to study how preprocessing choices—outlier thresholds (5% vs. 1%) and inclusion/exclusion of negative power values—affect early fault identification. Results demonstrate reliable fault detection up to 14 days before failure, retaining over 99% of the original dataset. This work provides key insights into preprocessing impacts on model reliability and offers an open-source Python implementation for reproducibility.
ISSN:1996-1073
DOI:10.3390/en18225954
Fuente:Publicly Available Content Database