Power load event detection and classification based on edge symbol analysis and support vector machine

Authors:
Lei Jiang;Jiaming Li;Suhuai Luo;Sam West;Glenn Platt
Affiliations:
School of DCIT, University of Newcastle, Callaghan, Australia;Commonwealth Scientific and Industrial Research Organization, Clayton South, Australia;School of DCIT, University of Newcastle, Callaghan, Australia;Energy Technology Division, Commonwealth Scientific and Industrial Research Organization, Clayton South, Australia;Energy Technology Division, Commonwealth Scientific and Industrial Research Organization, Clayton South, Australia
Venue:
Applied Computational Intelligence and Soft Computing
Year:
2012

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Abstract

Energy signature analysis of power appliance is the core of nonintrusive load monitoring (NILM) where the detailed data of the appliances used in houses are obtained by analyzing changes in the voltage and current. This paper focuses on developing an automatic power load event detection and appliance classification based on machine learning. In power load event detection, the paper presents a new transient detection algorithm. By turn-on and turn-off transient waveforms analysis, it can accurately detect the edge point when a device is switched on or switched off. The proposed load classification technique can identify different power appliances with improved recognition accuracy and computational speed. The load classification method is composed of two processes including frequency feature analysis and support vector machine. The experimental results indicated that the incorporation of the new edge detection and turn-on and turn-off transient signature analysis into NILM revealed more information than traditional NILM methods. The load classification method has achieved more than ninety percent recognition rate.