Self-learning, real-time, data-driven power metering system
First Claim
1. A method of addressing disaggregation error at a site, said method comprising:
- computing a disaggregation error of a plurality of loads over a plurality of time intervals at said site, said computing using measured power of said loads and predicted power of said loads, said measured power being measured using temporary power meters;
determining that said disaggregation error is not within a requirement of said site;
ranking said loads based upon a length of time during which each of said loads is operating and no power model is available for said each of said loads;
adding a permanent power meter to a worst load of said ranking having a longest time of said ranking; and
measuring a power of said worst load using said added permanent power meter, whereby said disaggregation error is reduced.
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Accused Products
Abstract
A power metering system includes any number of sites and a central database. Loads within a site are unmetered and a sensor data vector over time includes sensor data, operational data and external data. Iteration occurs over time intervals for all unmetered loads and the unmeasured power for each interval is disaggregated by matching a load type with a computer model in the central database having the same feature domain in order to predict the power usage of each load. Iteration again occurs over those intervals in which only a single load is operating; the power of that load is determined to be the unmeasured power minus miscellaneous power, and a new computer model is fitted for that single load and also uploaded to the database. The feature domain of an existing model may also be increased. Both iteration steps repeat until no more unmeasured power can be disaggregated.
7 Citations
11 Claims
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1. A method of addressing disaggregation error at a site, said method comprising:
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computing a disaggregation error of a plurality of loads over a plurality of time intervals at said site, said computing using measured power of said loads and predicted power of said loads, said measured power being measured using temporary power meters; determining that said disaggregation error is not within a requirement of said site; ranking said loads based upon a length of time during which each of said loads is operating and no power model is available for said each of said loads; adding a permanent power meter to a worst load of said ranking having a longest time of said ranking; and measuring a power of said worst load using said added permanent power meter, whereby said disaggregation error is reduced. - View Dependent Claims (2, 3, 4)
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5. A method of addressing disaggregation error at a site, said method comprising:
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computing a disaggregation error of a plurality of loads over a plurality of time intervals at said site, said computing using measured power of said loads and predicted power of said loads, said measured power being measured using temporary power meters; determining that said disaggregation error is not within a requirement of said site; ranking said loads based upon a length of time during which each of said loads is operating and no power model is available for said each of said loads; adding a data sensor to a worst load of said ranking having a longest time of said ranking; and predicting a power of said worst load using a power model that uses input from said data sensor, whereby said disaggregation error is reduced. - View Dependent Claims (6, 7, 8, 9)
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10. An apparatus for addressing disaggregation error at a site, said apparatus comprising:
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a plurality of loads operating at said site; a computer arranged to compute a disaggregation error of said loads over a plurality of time intervals using measured power of said loads and predicted power of said loads, said measured power being measured using temporary power meters, determine that said disaggregation error is not within a requirement of said site, and rank said loads based upon a length of time during which each of said loads is operating and no power model is available for said each of said loads; and a permanent power meter added to a worst load of said ranking having a longest time of said ranking, said permanent power meter arranged to measure a power of said worst load, whereby said disaggregation error is reduced.
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11. An apparatus for addressing disaggregation error at a site, said apparatus comprising:
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a plurality of loads operating at said site; a computer arranged to compute a disaggregation error of said loads over a plurality of time intervals using measured power of said loads and predicted power of said loads, said measured power being measured using temporary power meters, determine that said disaggregation error is not within a requirement of said site, and rank said loads based upon a length of time during which each of said loads is operating and no power model is available for said each of said loads; and a data sensor added to a worst load of said ranking having a longest time of said ranking, said data sensor arranged to input data to a power model that predicts power of said worst load, whereby said disaggregation error is reduced.
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Specification