Method and apparatus for instrument transformer reclassification
First Claim
1. A method for reclassifying measurements made by legacy instrumentation of a power parameter of an electric power line, the method comprising:
- coupling a sensor to said electric power line;
monitoring at least one power parameter with said sensor and producing at least one digital representation of said at least one power parameter, said monitoring includes producing at least one of a voltage magnitude, a current magnitude, and at least one of a voltage phase and a current phase relative to a reference, wherein said reference is time derived from a signal received from at least one satellite;
transmitting a data packet containing at least said digital representation to a microprocessor based device;
obtaining a measurement of said power parameter produced by said legacy instrumentation;
comparing said digital representation of said at least one power parameter of said sensor to said measurement of said power parameter produced by said legacy instrumentation to generate compensation data; and
applying said compensation data to reclassify future measurements of said power parameter made by said legacy instrumentation.
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Accused Products
Abstract
Systems and methods for reclassifying instrument transformers. A line mounted device that includes a sensor that can be attached to a power line. The line mounted device generates data or representations of the power parameters of the power line. A processor in the line mounted device produces modified representations of the power parameters that are transmitted wirelessly to a microprocessor based device. The microprocessor based device also receives second representations of the power parameters from legacy instrumentation. Compensation data is produced based on the modified representations from the line mounted device and the second representations from the legacy instrumentation. The compensation data can be used to compensate or correct the representations of the power parameters from the legacy instrumentation even after the line mounted device is no longer attached to the power line.
46 Citations
51 Claims
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1. A method for reclassifying measurements made by legacy instrumentation of a power parameter of an electric power line, the method comprising:
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coupling a sensor to said electric power line; monitoring at least one power parameter with said sensor and producing at least one digital representation of said at least one power parameter, said monitoring includes producing at least one of a voltage magnitude, a current magnitude, and at least one of a voltage phase and a current phase relative to a reference, wherein said reference is time derived from a signal received from at least one satellite; transmitting a data packet containing at least said digital representation to a microprocessor based device; obtaining a measurement of said power parameter produced by said legacy instrumentation; comparing said digital representation of said at least one power parameter of said sensor to said measurement of said power parameter produced by said legacy instrumentation to generate compensation data; and applying said compensation data to reclassify future measurements of said power parameter made by said legacy instrumentation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for reclassifying measurements made by legacy instrumentation of a power parameter of an electric power line, the method comprising:
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coupling a sensor to said electric power line; monitoring at least one power parameter with said sensor and producing at least one digital representation of said at least one power parameter; transmitting a data packet containing at least said digital representation to a microprocessor based device; obtaining a measurement of said power parameter produced by said legacy instrumentation; comparing said digital representation of said at least one power parameter of said sensor to said measurement of said power parameter produced by said legacy instrumentation to generate compensation data; applying said compensation data to reclassify future measurements of said power parameter made by said legacy instrumentation; and limiting the sensor to a predetermined number of reclassification cycles, wherein each reclassification cycle generates new compensation data.
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12. In an environment where legacy instrumentation monitors at least one power parameter of a power line, a system for improving the accuracy of measurements of the least one power parameter monitored by the legacy instrumentation, the system comprising:
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a line device operative to couple to said power line and monitor at least one power parameter of said power line; a microprocessor based device coupled to legacy instrumentation and to the line device, the microprocessor based device operative to receive an indication of said at least one power parameter from said line device and said legacy instrumentation, wherein said microprocessor based device produces compensation data based on a comparison between said at least one power parameter from said line device and said at least one power parameter monitored by said legacy instrumentation, said microprocessor using said compensation data to correct an inaccuracy of measurement of said at least one power parameter by said legacy instrumentation; and wherein said line device comprises; a sensor operative to interface with said power line and produce at least one data indicative of said at least one power parameter; a processor coupled with said sensor and operative to produce said indication of said at least one power parameter from said at least one data; and wireless communication circuitry coupled with said processor and operative to transmit said indication of said at least one power parameter to said microprocessor based device. - View Dependent Claims (13, 14, 15, 16, 17)
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18. The system of 16, wherein said security module encrypts said indication of said at least one power parameter to limit a use of said line device.
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19. The system of 16, wherein said security module limits the line device to a fixed number of reclassification cycles, wherein each reclassification cycle produces said compensation data.
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20. The system of 12, wherein said microprocessor device has a wireless connection with at least one of said line device and said legacy instrumentation.
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21. The system of 12, wherein said sensor comprises a split core enabling said sensor to be clamped around the power line.
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22. A device for attachment to a high voltage power line and facilitating improvement in monitoring of the high voltage power line by legacy instrumentation, the device comprising:
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a sensor operative to couple with said power line and produce at least one digital representation of a power parameter of said power line; a processor coupled to said sensor and operative to receive said at least one digital representation and produce at least one modified representation of said at least one digital representation; communication circuitry coupled to said processor and operative to wirelessly transmit said at least one modified digital representation to a microprocessor based device; and wherein said microprocessor based device is operative to couple to said legacy instrumentation and provide compensation data to said legacy instrumentation based on a comparison between said at least one modified digital representation and readings of said at least one power parameter from said legacy instrumentation, said compensation data used to compensate measurements of said at least one power parameter from said legacy instrumentation. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30)
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31. A method for compensating measurements of power parameters taken by legacy instrumentation, the method comprising:
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receiving first data from a line mounted device that is coupled to a power line, the first data corresponding to at least one power parameter of the power line; receiving second data from legacy instrumentation, the second data corresponding to the at least one power parameter of the power line; comparing the first data with the second data to produce compensation data; and for new data received from the legacy instrumentation that corresponds to the at least one parameter of the power line, correcting the new data using the compensation data. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39)
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40. A system for correcting measurements of a power parameter of a power line monitored by legacy instrumentation, the system comprising:
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a sensor operable to be attached to a power line while the power line is live, wherein the sensor generates a representation of a power parameter of the power line; a processor coupled to the sensor, wherein the processor receives the representation of the power parameter from the sensor and generates a modified representation of the power parameter; and a microprocessor based device that receives the modified representation of the power parameter through a wireless communication circuit connected to the processor and that receives a second representation of the power parameter from the legacy instrumentation, wherein the microprocessor based device compares the modified representation with the second representation of the power parameter to generate compensation data used correct at least the second representation of the power parameter. - View Dependent Claims (41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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Specification