Systems and methods for data compression and feature extraction for the purpose of disaggregating loads on an electrical network
First Claim
1. A method of detecting electrical power usage of one or more electrical devices coupled to an electrical power line carrying an alternating current with a predetermined period, the one or more electrical devices place one or more distinguishable intrinsic noise sources on the electrical power line superimposed on the alternating current, the method comprising:
- using a data acquisition device to acquire first data about the alternating current and the one or more distinguishable intrinsic noise sources on the electrical power line such that the acquiring of the first data is synchronized with the predetermined period of the alternating current;
processing the first data to create frequency domain data; and
applying a feature extraction algorithm to the frequency domain data to determine a transition of an electrical power state of at least a first one of the one or more electrical devices,wherein;
the transition of the electrical power state of at least the first one of the one or more electrical devices comprises at least one of (1) a turning on of at least the first one of the one or more electrical devices, (2) a turning off of at least the first one of the one or more electrical devices, or (3) a varying of an amount of power consumed by at least the first one of the one or more electrical devices.
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Accused Products
Abstract
Some embodiments concern a method of detecting usage of one or more electrical devices coupled to an electrical power line. An electrical power signal with a predetermined period is on the electrical power line. The one or more electrical devices place one or more noise signals on the electrical power line. The electrical power signal comprises the one or more noise signals. The method can include: using a data acquisition device to acquire first data about the electrical power signal on the electrical power line such that the acquiring of the first data is synchronized with the predetermined period of the electrical power signal; processing the first data to create frequency domain data; and applying a feature extraction algorithm to the frequency domain data to determine a transition of an electrical state of at least a first one of the one or more electrical devices. Other embodiments are disclosed.
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Citations
22 Claims
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1. A method of detecting electrical power usage of one or more electrical devices coupled to an electrical power line carrying an alternating current with a predetermined period, the one or more electrical devices place one or more distinguishable intrinsic noise sources on the electrical power line superimposed on the alternating current, the method comprising:
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using a data acquisition device to acquire first data about the alternating current and the one or more distinguishable intrinsic noise sources on the electrical power line such that the acquiring of the first data is synchronized with the predetermined period of the alternating current; processing the first data to create frequency domain data; and applying a feature extraction algorithm to the frequency domain data to determine a transition of an electrical power state of at least a first one of the one or more electrical devices, wherein; the transition of the electrical power state of at least the first one of the one or more electrical devices comprises at least one of (1) a turning on of at least the first one of the one or more electrical devices, (2) a turning off of at least the first one of the one or more electrical devices, or (3) a varying of an amount of power consumed by at least the first one of the one or more electrical devices. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 21)
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13. A method of compressing one or more first data signals, the method comprising:
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using one or more first processors to determine a zero crossing of the one or more first data signals, the one or more first data signals comprising an alternating current with a predetermined period and one or more distinguishable intrinsic noise sources superimposed on the alternating current, the one or more distinguishable intrinsic noise sources produced by one or more electrical devices; using the one or more first processors to determine a period of the one or more first data signals; sampling the one or more first data signals at a predetermined delay from the zero crossing of the one or more first data signals to create two or more cyclostationary signals, the two or more cyclostationary signals are cyclostationary with the one or more first data signals; using the one or more first processors to convert the two or more cyclostationary signals into frequency domain data; and using the one or more first processors to apply a first compression algorithm to the frequency domain data to create compressed frequency domain data, wherein; the one or more distinguishable intrinsic noise sources are produced by the one or more electrical devices during a transition of an electrical power state of at least a first one of the one or more electrical devices; and the transition of the electrical power state of at least the first one of the one or more electrical devices comprises at least one of (1) a turning on of at least the first one of the one or more electrical devices, (2) a turning off of at least the first one of the one or more electrical devices, or (3) a varying of an amount of power consumed by at least the first one of the one or more electrical devices. - View Dependent Claims (14, 15, 16)
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17. An apparatus configured to detect a change in an electrical power state of one or more electrical devices, the one or more electrical devices are coupled to an electrical power infrastructure carrying an alternating current and generate distinguishable intrinsic noise on the electrical power infrastructure such that the distinguishable intrinsic noise is superimposed on the alternating current, the apparatus comprises:
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a data acquisition device comprising at least one first processor and configured to acquire first data about the distinguishable intrinsic noise and the alternating current on the electrical power infrastructure such that the acquiring of the first data is synchronized with a predetermined period of the alternating current; a processing module configured to run on at least one first processor of the data acquisition device and configured to use the first data to create frequency domain data; and a feature extraction module configured to run on the at least one first processor of the data acquisition device and further configured to apply a feature extraction algorithm to the frequency domain data to determine a transition of an electrical power state of at least a first one of the one or more electrical devices, wherein; the transition of the electrical power state of at least the first one of the one or more electrical devices comprises at least one of (1) a turning on of at least the first one of the one or more electrical devices, (2) a turning off of at least the first one of the one or more electrical devices, or (3) a varying of an amount of power consumed by at least the first one of the one or more electrical devices. - View Dependent Claims (18, 19, 20, 22)
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Specification