A Robust and Explainable Data-Driven Anomaly Detection Approach For Power Electronics
This work addresses timely anomaly detection for maintaining production systems and mitigating cyberattacks in power electronics, though it appears incremental as it applies existing methods with customizations.
The paper tackles anomaly detection in power electronics by applying the Matrix Profile algorithm with custom filters to streaming time-series data, achieving high accuracy and performance in various fault scenarios through simple parameter tuning.
Timely and accurate detection of anomalies in power electronics is becoming increasingly critical for maintaining complex production systems. Robust and explainable strategies help decrease system downtime and preempt or mitigate infrastructure cyberattacks. This work begins by explaining the types of uncertainty present in current datasets and machine learning algorithm outputs. Three techniques for combating these uncertainties are then introduced and analyzed. We further present two anomaly detection and classification approaches, namely the Matrix Profile algorithm and anomaly transformer, which are applied in the context of a power electronic converter dataset. Specifically, the Matrix Profile algorithm is shown to be well suited as a generalizable approach for detecting real-time anomalies in streaming time-series data. The STUMPY python library implementation of the iterative Matrix Profile is used for the creation of the detector. A series of custom filters is created and added to the detector to tune its sensitivity, recall, and detection accuracy. Our numerical results show that, with simple parameter tuning, the detector provides high accuracy and performance in a variety of fault scenarios.