Transient event detector for use in nonintrusive load monitoring systems
AssigneeMassachusetts Institute of Technology
InventorsSteven B. Leeb, James L. Kirtley, Jr.
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Abstract
The present invention provides a transient event detector for use in a nonintrusive electrical load monitoring system at a monitored site having at least one electrical load. The transient event detector includes a data acquisition portion for acquiring and storing start-up power transient pattern data associated with each electrical load being monitored; a monitor for continuously monitoring total power load pattern data at the site; and a processor for correlating the transient pattern data to the total power load pattern data in order to identify each electrical load.
Claims34
A transient event detector for use in a nonintrusive electrical load monitoring system at a monitored site having at least one electrical load, said detector comprising:
- data acquisition means for acquiring and storing start-up power transient pattern data associated with each electrical load being monitored, said power transient data corresponding to approximate envelopes of harmonic content of observed current or voltage waveforms produced by said at least one electrical load;
- monitoring means for continuously monitoring total power load pattern data at said site, said total power load pattern data corresponding to an aggregation of said envelopes of harmonic content;
- and
- processing means for corresponding time varying sections of said transient pattern data to time varying sections of said total power load pattern data in order to identify each electrical load.
A method of transient event detection in a nonintrusive electrical load monitoring system at a monitored site having at least one electrical load, said method comprising the steps of:
- acquiring and storing operational start-up power transient pattern data associated with each electrical load being monitored, said power transient data corresponding to approximate envelopes of harmonic content of observed current or voltage waveforms produced by said at least one electrical load;
- monitoring total power load pattern data at said site, said total power load pattern data corresponding to an aggregation of said envelopes of harmonic content;
- correlating time varying sections of said transient pattern data to time varying sections of said total power load pattern data;
- and
- identifying each electrical load which is being operated at said site.
Dependencies are inferred from the claim text.