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An unsupervised load disaggregation approach based on graph signal processing featuring power sequences

Published: 08 December 2022 Publication History

Abstract

Non-intrusive load monitoring (NILM) offers appliance-level electricity usage details via analysing aggregate power readings. Although graph signal processing (GSP) concepts have been applied to load disaggregation from low-rate power measurements in an unsupervised manner, the robustness of GSP-based NILM solutions can be enhanced by improving feature selection. In this paper, a method is proposed for extracting state transition sequence (STS) features from power readings, instead of power changes and steady-state power sequences featured in the existing works. By building a graph for the extracted STSs, clustering can be performed, where dynamic time warping is used to calculate correlation between STSs. Finally, the grouped STSs is matched for performing load disaggregation. Experiments are carried out on publicly-accessible AMPds and REFIT datasets, showing the proposed method generally outperforms two state-of-the-art benchmarks in various evaluation metrics.

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Cited By

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  • (2023)Apply Graph Signal Processing on NILM: An Unsupervised Approach Featuring Power SequencesSensors10.3390/s2308393923:8(3939)Online publication date: 12-Apr-2023
  • (2023)A Semi-Supervised Approach for Improving Generalization in Non-Intrusive Load MonitoringSensors10.3390/s2303144423:3(1444)Online publication date: 28-Jan-2023
  • (2023)Accuracy Improvement of Non-Intrusive Load Monitoring Using Voting-Based Consensus ClusteringIEEE Access10.1109/ACCESS.2023.3279489(1-1)Online publication date: 2023

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  1. An unsupervised load disaggregation approach based on graph signal processing featuring power sequences

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    cover image ACM Conferences
    BuildSys '22: Proceedings of the 9th ACM International Conference on Systems for Energy-Efficient Buildings, Cities, and Transportation
    November 2022
    535 pages
    ISBN:9781450398909
    DOI:10.1145/3563357
    Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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    Published: 08 December 2022

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    Author Tags

    1. feature extraction
    2. graph signal processing
    3. non-intrusive load monitoring

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    View all
    • (2023)Apply Graph Signal Processing on NILM: An Unsupervised Approach Featuring Power SequencesSensors10.3390/s2308393923:8(3939)Online publication date: 12-Apr-2023
    • (2023)A Semi-Supervised Approach for Improving Generalization in Non-Intrusive Load MonitoringSensors10.3390/s2303144423:3(1444)Online publication date: 28-Jan-2023
    • (2023)Accuracy Improvement of Non-Intrusive Load Monitoring Using Voting-Based Consensus ClusteringIEEE Access10.1109/ACCESS.2023.3279489(1-1)Online publication date: 2023

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