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Non-intrusive load monitoring based on semi-supervised smooth teacher graph learning with voltage–current trajectory

Abstract

Non-intrusive load monitoring (NILM) is a novel and cost-effective technology for monitoring load electricity energy consumption detail. It can support the construction of “energy internet” and electricity consumption big data in smart cities, promote the construction of internet ecology, and support the dual carbon goal achieved. Recently, most current researchers have employed machine learning methods to make those inferences. As the most challenging problem in this specific field, the machine learning algorithms usually require a large pool of labeled observations and are poor in multi-state load identification. In this paper, we first design a semi-supervised learning backbone that leverages external and internal structural information to reduce the required labeling effort. Then, a smooth teacher graph based on semi-supervised learning model is proposed for multi-state load, the teacher graph helps the fusing of cluster become tighter and more effective for multi-state load signatures. Specifically, we use the color V–I trajectory to enhance the load signature’s uniqueness. Experiments in public datasets PLAID and WHITED show the performance of the proposed method. We find that our algorithm could outperform state-of-the-art results on these datasets.

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Acknowledgements

This work was supported by National Natural Science Foundation of China (U1908213). Colleges and Universities in Hebei Province Science Research Program (QN2020504). The Fundamental Research Funds for the Central UniversitiesN2223001.

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Correspondence to Keke Li.

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Han, Y., Li, K., Feng, H. et al. Non-intrusive load monitoring based on semi-supervised smooth teacher graph learning with voltage–current trajectory. Neural Comput & Applic (2022). https://doi.org/10.1007/s00521-022-07508-7

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  • DOI: https://doi.org/10.1007/s00521-022-07508-7

Keywords

  • Non-instrusive load monitoring(NILM)
  • Semi-supervised learning(SSL)
  • V–I trajectory
  • Teacher graph
  • Load identification