Self-learning, real-time, data-driven power metering system
First Claim
1. A method of disaggregating power at a site, said method comprising:
- identifying a first time interval when only a single first load is operating at said site;
determining a first load power used during said first time interval by said first load;
fitting a model using selected sensor data of said site during said first time interval and said determined first load power;
determining a second load power used by said first load during a second time interval during which at least one other second load is operating using said model;
outputting said first and second load powers;
identifying one of a plurality of loads at said site for which, during a time longer than for other loads of said plurality of loads, no model can be fit while said one load is operating, said one load not including a power meter; and
adding a power meter to said one load to measure a load power used by said one load.
1 Assignment
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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.
8 Citations
25 Claims
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1. A method of disaggregating power at a site, said method comprising:
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identifying a first time interval when only a single first load is operating at said site; determining a first load power used during said first time interval by said first load; fitting a model using selected sensor data of said site during said first time interval and said determined first load power; determining a second load power used by said first load during a second time interval during which at least one other second load is operating using said model; outputting said first and second load powers; identifying one of a plurality of loads at said site for which, during a time longer than for other loads of said plurality of loads, no model can be fit while said one load is operating, said one load not including a power meter; and adding a power meter to said one load to measure a load power used by said one load. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of disaggregating power of a site, said method comprising:
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out of a plurality of loads operating at said site during a plurality of time intervals, identifying a model in a database that predicts power used by a first of said loads during one of said time intervals; subtracting said predicted power from a running total of unmeasured power used by said site during said time interval and indicating that said first load is not operating during said time interval; determining power used by a second of said loads during one of said time intervals when no other loads are operating or are indicated as operating; fitting a new model using said determined power and storing said new model in said database; outputting said predicted power and said determined power; identifying a third of said plurality of loads at said site for which, during a time longer than for other loads of said plurality of loads, no model can be fit while said third load is operating, said third load not including a power meter; and adding a power meter to said third load to measure a load power used by said third load. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A method of disaggregating power at a plurality of sites, said method comprising:
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identifying a first time interval when only a single first load is operating at a first site; determining a first load power used during said first time interval by said first load; fitting a model using selected sensor data of said first site during said first time interval and said determined first load power; identifying a second load operating at a second site different from said first site and being of the same type as said first load operating at said first site; determining a second load power used during a second time interval by said second load using said model; outputting said determined second load power; identifying one of a plurality of loads at said first site for which, during a time longer than for other loads of said plurality of loads, no model can be fit while said one load is operating, said one load not including a power meter; and adding a power meter to said one load to measure a load power used by said one load. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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Specification