Low-complexity energy disaggregation using appliance load modelling

Hana Altrabalsi; Vladimir Stankovic; Jing Liao; Lina Stankovic; Hana Altrabalsi; Vladimir Stankovic; Jing Liao; Lina Stankovic

doi:10.3934/energy.2016.1.1

AIMS Energy

2016, Volume 4, Issue 1: 1-21. doi: 10.3934/energy.2016.1.1

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Research article Topical Sections

Low-complexity energy disaggregation using appliance load modelling

Department of Electronic and Electrical Engineering, University of Strathclyde, Glasgow, UK

Received: 26 October 2015 Accepted: 23 December 2015 Published: 05 January 2016

Large-scale smart metering deployments and energy saving targets across the world have ignited renewed interest in residential non-intrusive appliance load monitoring (NALM), that is, disaggregating total household’s energy consumption down to individual appliances, using purely analytical tools. Despite increased research efforts, NALM techniques that can disaggregate power loads at low sampling rates are still not accurate and/or practical enough, requiring substantial customer input and long training periods. In this paper, we address these challenges via a practical low-complexity lowrate NALM, by proposing two approaches based on a combination of the following machine learning techniques: k-means clustering and Support Vector Machine, exploiting their strengths and addressing their individual weaknesses. The first proposed supervised approach is a low-complexity method that requires very short training period and is fairly accurate even in the presence of labelling errors. The second approach relies on a database of appliance signatures that we designed using publicly available datasets. The database compactly represents over 200 appliances using statistical modelling of measured active power. Experimental results on three datasets from US, Italy, Austria and UK, demonstrate the reliability and practicality.
- energy disaggregation,
- appliance modelling,
- non-intrusive appliance load monitoring
Citation: Hana Altrabalsi, Vladimir Stankovic, Jing Liao, Lina Stankovic. Low-complexity energy disaggregation using appliance load modelling[J]. AIMS Energy, 2016, 4(1): 1-21. doi: 10.3934/energy.2016.1.1

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Abstract

Large-scale smart metering deployments and energy saving targets across the world have ignited renewed interest in residential non-intrusive appliance load monitoring (NALM), that is, disaggregating total household’s energy consumption down to individual appliances, using purely analytical tools. Despite increased research efforts, NALM techniques that can disaggregate power loads at low sampling rates are still not accurate and/or practical enough, requiring substantial customer input and long training periods. In this paper, we address these challenges via a practical low-complexity lowrate NALM, by proposing two approaches based on a combination of the following machine learning techniques: k-means clustering and Support Vector Machine, exploiting their strengths and addressing their individual weaknesses. The first proposed supervised approach is a low-complexity method that requires very short training period and is fairly accurate even in the presence of labelling errors. The second approach relies on a database of appliance signatures that we designed using publicly available datasets. The database compactly represents over 200 appliances using statistical modelling of measured active power. Experimental results on three datasets from US, Italy, Austria and UK, demonstrate the reliability and practicality.

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