On-site Online Feature Selection for Classification of Switchgear Actuations

TL;DR

This paper introduces a computationally efficient online feature selection method for switchgear classification, enabling on-site training and aging detection using MEMS sensor data, suitable for various switchgear types.

Contribution

A novel online feature selection approach that allows local training without offline data, adaptable to different switchgear and aging monitoring.

Findings

Effective on four switchgear datasets

Features can track aging-related changes

Method suitable for real-time on-site deployment

Abstract

As connected sensors continue to evolve, interest in low-voltage monitoring solutions is increasing. This also applies in the area of switchgear monitoring, where the detection of switch actions, their differentiation and aging are of fundamental interest. In particular, the universal applicability for various types of construction plays a major role. Methods in which design-specific features are learned in an offline training are therefore less suitable for assessing the condition of switchgears. A new computational efficient method for intelligent online feature selection is presented, which can be used to train a model for the addressed use cases on-site. Process- and design-specific features can be learned locally (e.g. on a sensor system) without the need of prior offline training. The proposed method is evaluated on four datasets of switchgear measurements, which were recorded using microelectromechanical system (MEMS) based sensors (acoustic and vibration). Furthermore, we show that the features selected by our method can be used to track changes in switching processes due to aging effects.