Non-Intrusive Load Monitoring for LED Light Classification: A Data-driven Machine Learning Approach

Monitoring the operational status of LED lights is important to achieve energy efficiency and protect user health. Recent studies employed machine learning and several parameters, such as the LED’s light output and electrical characteristics, to classify their operational status. However, under changing environmental conditions, these methods will no longer be effective, due to the compromise of the environmental noise to the input data of the models. In this study, we proposed a novel approach to identifying the operational status of household LED lights using non-intrusive load monitoring, machine learning models, confident learning, and the oscillation characteristic of the root-mean-square (RMS) current. By using the oscillation characteristics of the RMS current, we significantly reduced the number of inputs to the models and their computational hardware requirements compared to models using the RMS current. With the introduction of confident learning, we improved the prediction accuracy of the models by 2% on average. The models achieved prediction accuracy ranging from 94% to 97.5%. The proposed method shows potential in applying to different kinds of electrical devices.