Monitoring load operation

Patent metadata

Field	Value
Publication number	US-10409273-B2
Application number	US-201314761093-A
Country	US
Kind code	B2
Filing date	Jan 16, 2013
Priority date	Jan 16, 2013
Publication date	Sep 10, 2019
Grant date	Sep 10, 2019

Abstract

A method of monitoring power usage of a load includes defining one or more parameters of the load that vary with a mode of operation of the load, receiving measurement data related to the one or more parameters of the load over a first period of time, recording the measurement data, determining a plurality of groups, each group defining a set of measurements in a continuous range of values, each group having a lower threshold value and an upper threshold value, the lower and upper threshold values defined by having less than a minimum threshold number of recorded measurements of the lower and upper threshold values, and associating a mode of operation with each of the plurality of groups.

First claim

What is claimed is:

1. A method of monitoring power usage of a plurality of loads using a load monitoring system, the load monitoring system including a plurality of load monitors, each of the plurality of load monitors coupled to a respective load of the plurality of loads, the method comprising:
defining one or more parameters of the plurality of loads that vary with a mode of operation of the loads;
receiving measurement data related to the one or more parameters of the plurality of loads over a first, baseline period of time at respective inputs of the plurality of load monitors;
recording the measurement data;
determining a plurality of groups indicative of a plurality of modes of operation of the plurality of loads based on the measurement data, each group defining a set of measurements in a continuous range of values, each group having a lower threshold value and an upper threshold value, the lower and upper threshold values defined by having fewer than a minimum threshold number of recorded measurements of the lower and upper threshold values;
storing the plurality of modes of operation of the plurality of loads;
receiving additional measurement data after the first, baseline period of time;
determining if the additional measurement data fits into any of the plurality of groups;
in response to determining at least some of the additional measurement data does not fit into any of the plurality of groups, generating a count value indicative of a number of the additional measurement data not fitting into any of the plurality of groups;
in response to the count value exceeding a threshold, receiving measurement data related to the one or more parameters of the plurality of loads over a new, baseline period of time, and recalibrating the plurality of groups and the stored plurality of modes of operation based on the measurement data received over the new, baseline period of time;
determining a maintenance schedule for each load of the plurality of loads based on the stored plurality of modes of operation and a detected pattern of operation of each of the plurality of loads; and
scheduling maintenance of each of the plurality of loads based on the determined maintenance schedule.

2. The method of claim 1 , further comprising:
in response to determining at least some of the additional measurement data fits into any of the plurality of groups, determining at least one group of the plurality of groups in which the additional measurement data belongs; and
based on the determining of the at least one group, generating an indication of the modes of operation of the plurality of loads.

3. The method of claim 1 , wherein the modes of operation of the plurality of loads are stored over a second time period.

4. The method of claim 1 , wherein the detected pattern of operation of each of the plurality of loads is associated with a duty cycle of the loads, and the duty cycle of the loads is based on power usage of each mode of operation.

5. The method of claim 1 , wherein the detected pattern of operation of each of the plurality of loads is associated with a time of actual operation of the loads.

6. The method of claim 2 , wherein the generating an indication of the modes of operation of the plurality of loads comprises generating the indication on a monitor.

7. The method of claim 6 , further comprising providing the indication to a server.

8. The method of claim 6 , further comprising providing the indication to a mobile device.

9. The method of claim 1 , wherein the plurality of load monitors measures the measurement data periodically, wherein the periodicity of the measuring changes based on environmental parameters.

10. The method of claim 1 , wherein the plurality of load monitors measures the measurement data in response to detected changes in the one or more parameters.

11. The method of claim 1 , wherein at least one of the plurality of modes of operation corresponds to an on-state of at least one of the plurality of loads, and at least one of the plurality of modes of operation corresponds to an off-state of the at least one of the plurality of loads.

12. A load monitoring system for a facility, comprising:
a plurality of load monitors configured to monitor one or more parameters of a respective plurality of loads in the facility; and
a processor configured to be coupled to the plurality of load monitors and configured to:
receive measurement data related to the one or more parameters of the plurality of loads over a first, baseline period of time from the plurality of load monitors;
record the measurement data;
determine a plurality of groups indicative of a plurality of modes of operation of the plurality of loads based on the measurement data, each group defining a set of measurements in a continuous range of values, each group having a lower threshold value and an upper threshold value, the lower and upper threshold values defined by having fewer than a minimum threshold number of recorded measurements of the lower and upper threshold values;
store the plurality of modes of operation of the plurality of loads;
determine if additional measurement data fits into any of the plurality of groups;
in response to determining at least some of the additional measurement data does not fit into any of the plurality of groups, generate a count value indicative of a number of the additional measurement data not fitting into any of the plurality of groups;
in response to the count value exceeding a threshold, receive measurement data related to the one or more parameters of the plurality of loads over a new, baseline period of time, and recalibrate the plurality of groups and the stored plurality of modes of operation based on the measurement data received over the new, baseline period of time;
determine a maintenance schedule for each load of the plurality of loads based on the stored plurality of modes of operation and a detected pattern of operation of each of the plurality of loads; and
schedule maintenance of each of the plurality of loads based on the determined maintenance schedule.

13. The load monitoring system of claim 12 , the processor further configured to:
in response to determining at least some of the additional measurement data fits into any of the groups, determine at least one group of the plurality of groups in which the additional measurement data belongs; and
based on the determining of the at least one group, generate an indication of the modes of operation of the plurality of loads.

14. The load monitoring system of claim 12 , wherein the processor stores the modes of operation of the plurality of loads over a second time period.

15. The load monitoring system of claim 12 , wherein the detected pattern of operation of each of the plurality of loads is associated with a duty cycle of the loads, and the duty cycle of the loads is based on power usage of each mode of operation.

16. The load monitoring system of claim 12 , wherein the detected pattern of operation of each of the plurality of loads is associated with a time of actual operation of the loads.

17. The load monitoring system of claim 13 , further comprising more servers comprising the processor.

18. The load monitoring system of claim 13 , wherein the plurality of monitors comprises the processor.

19. The load monitoring system of claim 13 , further comprising a mobile device, the processor further configured to provide the indication to the mobile device.

20. A non-transitory computer readable medium having stored th

Assignees

• Schneider Electric Usa Inc

Inventors

• Van Gorp John C
• Balding Shawn Edward
• Van Campen Jacques Roland

Classifications

• H02J2105/42

  Home appliances · CPC title

• G01R21/133

  by using digital technique · CPC title

• G01R21/1331

  Measuring real or reactive component, measuring apparent energy · CPC title

• G05B23/0221 Primary

  Preprocessing measurements, e.g. data collection rate adjustment; Standardization of measurements; Time series or signal analysis, e.g. frequency analysis or wavelets; Trustworthiness of measurements; Indexes therefor; Measurements using easily measured parameters to estimate parameters difficult to measure; Virtual sensor creation; De-noising; Sensor fusion; Unconventional preprocessing inherently present in specific fault detection methods like PCA-based methods · CPC title

• H02J3/14

  by switching loads on to, or off from, the networks, e.g. progressively balanced loading · CPC title