Nonintrusive Load Monitoring and Diagnostics in Power Systems

• Published in: IEEE transactions on instrumentation and measurement Vol. 57; no. 7; pp. 1445 - 1454
• Main Authors: Shaw, S.R., Leeb, S.B., Norford, L.K., Cox, R.W.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-07-2008; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Diagnostics; Hardware; Load modeling; Monitoring; pattern recognition; Power distribution; Power system modeling; Power system transients; Power systems; Sensor systems; System identification; System testing; Diagnostics; system identification; pattern recognition
• ISSN: 0018-9456; 1557-9662
• DOI: 10.1109/TIM.2008.917179

This paper describes a transient event classification scheme, system identification techniques, and implementation for use in nonintrusive load monitoring. Together, these techniques form a system that can determine the operating schedule and find parameters of physical models of loads that are connected to an AC or DC power distribution system. The monitoring system requires only off-the-shelf hardware and recognizes individual transients by disaggregating the signal from a minimal number of sensors that are installed at a central location in the distribution system. Implementation details and field tests for AC and DC systems are presented.