METHOD FOR NON-INTRUSIVE LOAD MONITORING USING A HYBRID SYSTEMS STATE ESTIMATION APPROACH
First Claim
1. A method for non-intrusively monitoring a load including a plurality of appliances, the method comprising:
- retrieving a plurality of mathematical models, each of the models modeling operation of a respective subset of the appliances;
predicting a value of a respective operational parameter for each said subset of the appliances;
measuring an output of the load;
calculating a respective value of each of the operational parameters, the calculating being based on the mathematical models and the outputs of the load;
repeating the predicting, measuring and calculating steps until a metric pertaining to a difference error between the measured output and the predicted output calculated from the operational parameter and the mathematical models is equal to or below a threshold for one said subset of the appliances; and
deciding that each said appliance in the one said subset of the appliances whose metric pertaining to a difference error is equal to or below the threshold is currently operating.
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Accused Products
Abstract
A method for non-intrusively monitoring a load including a plurality of appliances includes retrieving a plurality of mathematical models for modeling operation of a respective subset of the appliances. A value of a respective operational parameter is predicted for each of the subsets of appliances. An output of the load is measured. A respective value of each of the operational parameters is calculated based on the mathematical models and the outputs of the load. The predicting, measuring and calculating steps are repeated until a metric pertaining to a difference error between the measured output and the predicted output calculated from the operational parameter and the mathematical models is equal to or below a threshold for one of the subsets of appliances. It is decided that the one subset of appliances is currently operating whose metric pertaining to a difference error is equal to or below the threshold.
59 Citations
22 Claims
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1. A method for non-intrusively monitoring a load including a plurality of appliances, the method comprising:
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retrieving a plurality of mathematical models, each of the models modeling operation of a respective subset of the appliances; predicting a value of a respective operational parameter for each said subset of the appliances; measuring an output of the load; calculating a respective value of each of the operational parameters, the calculating being based on the mathematical models and the outputs of the load; repeating the predicting, measuring and calculating steps until a metric pertaining to a difference error between the measured output and the predicted output calculated from the operational parameter and the mathematical models is equal to or below a threshold for one said subset of the appliances; and deciding that each said appliance in the one said subset of the appliances whose metric pertaining to a difference error is equal to or below the threshold is currently operating. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for non-intrusively monitoring a load including a plurality of appliances, the method comprising:
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retrieving a plurality of mathematical models, each of the models modeling operation of a respective subset of the appliances as having continuous dynamics, the models modeling the appliances conjunctively as a discrete state system; predicting a value of a respective operational parameter for each said subset of the appliances; measuring an output of the load; calculating a respective value of each of the operational parameters, the calculating being based on the mathematical models and the outputs of the load; and deciding which of the subsets of appliances has most recently begun operating, the deciding being based upon the predicted and calculated values of the operational parameters of the subsets of appliances. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for non-intrusively monitoring a load including a plurality of appliances, the method comprising:
obtaining a plurality of mathematical models, each of the models modeling operation of a respective subset of the appliances, each of the models being of the form; - View Dependent Claims (16, 17, 18, 19, 20)
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21. A method for non-intrusively monitoring a load including a plurality of appliances, the method comprising:
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providing a state space model that models operation of all of the appliances; measuring an output of the load; and determining an input sequence of the state space model that is most likely to result in the measured output, the input sequence representing a sequence of the appliances being turned on and/or off. - View Dependent Claims (22)
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Specification