Predicting wind turbines faults using Multi-Objective Genetic Programming

Wind turbines are a key component of renewable energy, converting wind into electricity with minimal
environmental impact. Ensuring their continuous operation is crucial for maximizing energy production and
reducing costly downtimes. To extend their operational lifespan, proactive maintenance strategies that predict
and address potential faults are essential. While Machine Learning (ML) and Deep Learning (DL) algorithms
have demonstrated significant promise in detecting wind turbine faults, they often prioritize maximizing the
detection of failures without giving sufficient attention to false alarms. In practice, false alarms are just as
problematic as undetected failures, as they reduce efficiency and waste resources. In this paper, we propose
a novel optimization approach using Multi-Objective Genetic Programming (MOGP) to predict wind turbine
faults. Our approach seeks to identify the best combination of features and their threshold values by optimizing
two conflicting objectives: maximizing fault detection while minimizing false alarms. This dual-objective
strategy ensures reliable fault prediction while minimizing unnecessary maintenance actions. We assess the
effectiveness of our approach using real-world Supervisory Control and Data Acquisition (SCADA) data from a
wind turbine in southern Ireland. The results demonstrate the efficiency of our approach in fault identification,
achieving a competitive balance between recall (91%) and false positive rate (21%). While machine learning
(ML), specifically Random Forest (RF), shows promising performance with a recall of 91% and a 10% false
alarm rate, it remains a black-box model. RF lacks interpretability, making it challenging to extract meaningful
insights into the relationships between sensor features and fault occurrences.