Load Identification Based on Attention Semi-supervised Curriculum Label Learning with AVME-HT Feature

Non-intrusive load monitoring (NILM) is a cost-effective technology for monitoring detailed electricity energy consumption. In recent years, machine learning has emerged as the predominant approach for achieving NILM tasks. However, machine learning models require an extensive volume of labeled data which is unachievable in the real world. Additionally, the collected power data is susceptible to noise interference arising from grid or measurement error. To this end, this paper presents a new NILM method, adaptive variational mode extraction-Hilbert transform-excitation attention-semi-supervised curriculum label learning (AVME-HT-EA-SCLL), which offers robust anti-noise performance, comprehensive feature extraction, efficient utilization of unlabeled data and exceptional classification accuracy. The main contributions of this work include the proposed adaptive variational mode extraction (AVME) method for efficiently signal decomposition, a new feature extraction method, which combines AVME and Hilbert transform to extract unique features and filter out noise interference, a semi-supervised learning model based on curriculum learning strategy to identify appliances with limited labeled data, and an excitation attention network to amplify attention towards crucial information. Experimental evaluations conducted on public datasets such as the plug-load appliance identification dataset (PLAID) and the worldwide household and industry transient energy dataset (WHITED), as well as a private dataset collected in the lab, demonstrate that the proposed method surpasses state-of-the-art approaches.