DEVICE AND METHOD FOR DISAGGREGATING A PERIODIC INPUT SIGNAL PATTERN

• US 20140200725A1
• Filed: 09/05/2012
• Published: 07/17/2014
• Est. Priority Date: 09/12/2011
• Status: Abandoned Application

• Current Assignee: Philips Lighting Holding BV (Signify N.V.)
• Original Assignee: Koninklijke Philips N.V.
• Inventors: Dillen, Paulus Henricus Antonius
• Application Number:
  US14/238,220
• Publication Number:
  US 20140200725A1
• Time in Patent Office: Days
• US Class Current: 700/291
• CPC Class Codes: G01R 21/06 by measuring current and voltage G01R21/08 - G01R21/133 take precedence
• CPC Class Codes: G06F 18/00 Pattern recognition
• CPC Class Codes: G06F 2218/22 Source localisation; Inverse modelling

Abstract

The invention relates to a device (10) and a method for disaggregating a periodic input signal pattern (20), the input signal pattern (20) resulting from a superposition of element signal patterns corresponding to respective source elements. The invention further relates to a corresponding computer program. The input signal pattern (20) is processed and outputted. The processed signal pattern (22) is indicative of a change between portions of the input signal pattern (20), wherein such portion corresponds to at least a part of the period of the input signal pattern (20). Based on element information characterizing the element signal patterns and the processed signal pattern (22), a combination (24) of element signal patterns is identified, the superposition of which results in the input signal pattern (20).

Claims

1. A device for disaggregating a periodic input signal pattern indicative of power consumption, admittance and/or high frequency current in a power network in steady state and/or a transient situation, the input signal pattern resulting from a superposition of element signal patterns corresponding to respective consumer loads and/or supply elements in the power network, the device comprising:

a memory unit which is provided with element information characterizing the element signal patterns based on a continuously variable or stochastically variable value of the element signal patterns,

a processing unit for processing the input signal pattern and outputting a processed signal pattern, the processed signal pattern being indicative of a change between portions of the input signal pattern, wherein such portion corresponds to at least a part of the period of the input signal pattern, and

an identification unit for identifying a combination of element signal patterns, the superposition of which results in the input signal pattern, using the element information and the processed signal pattern.

2. The device according to claim 1, wherein

the memory unit is further provided with average information for the element signal patterns corresponding to an average of the respective element signal pattern over plural periods,

wherein the identification unit further uses also the average information for identifying.

3. The device according to claim 1, wherein

the processing includes at least one of

obtaining a pattern based on one or more of the second moment and higher order moments of the portion of the input signal pattern over a plurality of periods,

obtaining a frequency transformation of the portion of the input signal pattern over a plurality of periods,

performing autocorrelation on the portion of the input signal pattern over a plurality of periods,

obtaining a derivative of the portion of the input signal pattern over a plurality of periods,

computing a covariance between different portions of the input signal pattern over a plurality of periods, and

counting instances of values of the portion of the input signal pattern being above and/or below a respective threshold value over a plurality of periods.

4. The device according to claim 1, wherein

the processing includes obtaining a pattern indicative of a variance and/or a standard deviation of the portion of the input signal pattern over a plurality of periods.

6. The device according to claim 1, wherein

the identification unit is adapted for identifying the combination of element signal patterns, wherein a period of each element signal pattern equals the period of the input signal pattern.

7. The device according to claim 1, further comprising

an indication unit for indicating a combination of source elements corresponding to the identified combination of element signal patterns.

5. (canceled)

8. A method for disaggregating a periodic input signal pattern indicative of power consumption, admittance and/or high frequency current in a power network in steady state and/or a transient situation, the input signal pattern resulting from a superposition of element signal patterns corresponding to respective consumer loads and/or supply elements in the power network, the method comprising:

a step of providing element information characterizing the element signal patterns based on a continuously variable or stochastically variable value of the element signal patterns;

a step of processing the input signal pattern and outputting a processed signal pattern, the processed signal pattern being indicative of a change between portions of the input signal pattern, wherein such portion corresponds to at least a part of the period of the input signal pattern, and

a step of identifying a combination of element signal patterns, the superposition of which results in the input signal pattern, using the element information and the processed signal pattern.

9. A computer program including computer program means for causing a device for disaggregating a periodic input signal pattern to carry out the steps of the method according to claim 8, when the computer program is run on the device.