Method for Unsupervised Non-Intrusive Load Monitoring
AssigneeRobert Bosch GmbH
InventorsNaveen Ramakrishnan, Diego Benitez
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Abstract
A method distinguishes electrical signals corresponding to an activation or deactivation of a single electrical power consuming device from an electrical signal that supplies electricity to multiple electrical power consuming devices has been developed. The method includes generating signatures corresponding to activation and deactivation of a plurality of electrical devices from a transformation of an electrical power signal using sparse deconvolution to cluster and then identify the activation and deactivation of one of the plurality of electrical devices.
Claims19
A method for monitoring electrical power consumption comprising:
- identifying a plurality of electrical events corresponding to activation or deactivation of one of a predetermined number of electrical devices in a transformation of a time varying electrical power signal over a predetermined time period, the time varying electrical power signal supplying power to the predetermined number of electrical devices;
- deconvolving the identified plurality of electrical events in the transformation of the time varying electrical power signal to generate a first plurality of signatures, each signature in the first plurality of signatures corresponding to activation of one electrical device in the predetermined number of electrical devices, and to generate a second plurality of signatures, each signature in the second plurality of signatures corresponding to deactivation of one electrical device in the predetermined number of electrical devices;
- clustering the first plurality of signatures and second plurality of signatures to identify activations and deactivations of each electrical device in the predetermined number of electrical devices;
- and
- identifying one electrical device in the predetermined number of electrical devices corresponding to one signature in the first clustered plurality of signatures and one signature in the second clustered plurality of signatures.
A system for monitoring electrical power consumption comprising:
- an electrical power meter configured to measure a time varying electrical power signal that supplies power to a predetermined number of electrical devices;
- and
- a processor operatively connected to the electrical power meter and configured to store data generated by the electrical power meter corresponding to the time varying electrical power signal in a memory, the processor being further configured to:
- generate a transformation of the time varying electrical power signal with reference to the data stored in the memory corresponding to the time varying electrical power signal over a predetermined time period;
- identify a plurality of electrical events corresponding to activation or deactivation of one of the predetermined number of electrical devices in the transformation of the time varying electrical power signal;
- deconvolve the identified plurality of electrical events in the transformation of the time varying electrical power signal to generate a first plurality of signatures, each signature in the first plurality of signatures corresponding to activation of one electrical device in the predetermined number of electrical devices, and to generate a second plurality of signatures, each signature in the second plurality of signatures corresponding to deactivation of one electrical device in the predetermined number of electrical devices;
- cluster the first plurality of signatures and second plurality of signatures to identify activations and deactivations of each electrical device in the predetermined number of electrical devices;
- and
- identify one electrical device in the predetermined number of electrical devices corresponding to one signature in the first clustered plurality of signatures and one signature in the second clustered plurality of signatures.
Dependencies are inferred from the claim text.