SYSTEMS AND METHODS FOR MONITORING CURRENT VALUES

• US 20140142877A1
• Filed: 11/19/2012
• Published: 05/22/2014
• Est. Priority Date: 11/19/2012
• Status: Abandoned Application

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Pearson, William R.
• Application Number:
  US13/681,345
• Publication Number:
  US 20140142877A1
• Time in Patent Office: Days
• US Class Current: 702/64
• CPC Class Codes: G01R 15/18 using inductive devices, e.g. transformers
• CPC Class Codes: G01R 19/0038 Circuits for comparing several input signals and for indicating the result of this comparison, e.g. equal, different, greater, smaller (comparing pulses or pulse trains according to amplitude)
• CPC Class Codes: G01R 31/2849 Environmental or reliability testing, e.g. burn-in or validation tests of individual semiconductors G01R31/2642; of printed circuits boards G01R31/2817; of IC's G01R31/2855
• CPC Class Codes: G01R 31/62 Testing of transformers
• CPC Class Codes: G01R 35/00 Testing or calibrating of apparatus covered by the other groups of this subclass

Abstract

A current monitoring system is provided. The current monitoring system includes a plurality of transformer assemblies that are configured to generate a plurality of signals representative of current values. A computing device is coupled to the transformer assemblies. The computing device includes a processor that is programmed to analyze the signals to verify the accuracy of the current values associated with the signals. The processor is also programmed to select at least one verified pair of signals from the signals to calculate at least one value for at least one control variable.

Claims

1. A current monitoring system comprising:

a plurality of transformer assemblies configured to generate a plurality of signals representative of current values; and

a computing device coupled to said plurality of transformer assemblies, said computing device comprising a processor programmed to;

analyze the plurality of signals to verify the accuracy of the current values associated with the plurality of signals; and

select at least one verified pair of signals from the plurality of signals to calculate at least one value for at least one control variable.

2. A current monitoring system in accordance with claim 1, wherein said processor is programmed to analyze the plurality of signals by performing a magnitude calculation on at least one pair of signals of the plurality of signals and by calculating a continuous standard deviation on the result of the magnitude calculation.

3. A current monitoring system in accordance with claim 1, wherein said processor is further programmed to identify at least one signal of the plurality of signals that is representative of an outlier current value.

4. A current monitoring system in accordance with claim 3, wherein said computing device further comprises a presentation interface configured to display at least one output of the outlier current value to enable a user to identify whether one of said plurality of transformer assemblies is inoperable.

5. A current monitoring system in accordance with claim 1, wherein said computing device comprises a communication interface coupled to said processor, said communication interface is configured to transmit at least one output to a controller that generates control parameters based on the at least one value.

6. A current monitoring system in accordance with claim 1, wherein said plurality of transformer assemblies comprise a first transformer assembly configured to generate a first signal representative of a first current value, a second transformer assembly configured to generate a second signal representative of a second current value, and a third transformer assembly configured to generate a third signal representative of a third current value.

7. A current monitoring system in accordance with claim 6, wherein said processor is programmed to analyze the first, second, and third signals to verify the accuracy of the first, second, and third current values, respectively, said processor is further programmed to select at least two of the first, second, and third signals that have been verified to calculate the at least one value for the at least one control variable.

8. A power system comprising:

at least one generator; and

a current monitoring system coupled to said at least one generator, said current monitoring system comprising;

a plurality of transformer assemblies configured to generate a plurality of signals representative of current values being produced by said at least one generator; and

a computing device coupled to said plurality of transformer assemblies, said computing device comprising a processor programmed to analyze the plurality of signals to verify the accuracy of the current values associated with the plurality of signals and to select at least one verified pair of signals from the plurality of signals to calculate at least one value for at least one control variable.

9. A power system in accordance with claim 8, wherein said processor is programmed to analyze the plurality of signals by performing a magnitude calculation on at least one pair of signals of the plurality of signals and by calculating a continuous standard deviation on the result of the magnitude calculation.

10. A power system in accordance with claim 8, wherein said processor is further programmed to identify at least one signal of the plurality of signals that is representative of an outlier current value.

11. A power system in accordance with claim 10, wherein said computing device further comprises a presentation interface configured to display at least one output of the outlier current value to enable a user to identify whether one of said plurality of transformer assemblies is inoperable.

12. A power system in accordance with claim 8, further comprising a controller coupled to said computing device, wherein said controller is configured to generate control parameters based on the at least one value.

13. A power system in accordance with claim 8, wherein said plurality of transformer assemblies comprise a first transformer assembly configured to generate a first signal representative of a first current value, a second transformer assembly configured to generate a second signal representative of a second current value, and a third transformer assembly configured to generate a third signal representative of a third current value.

14. A power system in accordance with claim 13, wherein said processor is programmed to analyze the first, second, and third signals to verify the accuracy of the first, second, and third current values, respectively, said processor is further programmed to select at least two of the first, second, and third signals that have been verified to calculate the at least one value for the at least one control variable.

15. A method for monitoring current values, said method comprising:

generating a plurality of signals that are representative of current values via a plurality of transformer assemblies;

transmitting the plurality of signals to a computing device coupled to the plurality of transformer assemblies, wherein the computing device includes a processor;

analyzing, via the processor, the plurality of signals to verify the accuracy of the current values associated with the plurality of signals; and

selecting, via the processor, at least one verified pair of signals from the plurality of signals to calculate at least one value for at least one control variable.

16. A method in accordance with claim 15, further comprising transmitting, via a communication interface, at least one output to a controller that is configured to generate control parameters based on the at least one value.

17. A method in accordance with claim 15, further comprising identifying, via the processor, at least one signal of the plurality of signals that is representative of an outlier current value.

18. A method in accordance with claim 17, further comprising generating, via the processor, at least one output of the outlier current value.

19. A method in accordance with claim 18, further comprising displaying, via a presentation interface, the at least one output of the outlier current value to enable a user to identify whether one of the plurality of transformer assemblies is inoperable.

20. A method in accordance with claim 15, wherein analyzing, via the processor, the plurality of signals further comprises:

performing a magnitude calculation on at least one pair of signals of the plurality of signals; and

calculating a continuous standard deviation on the result of the magnitude calculation.