Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system
Patent
1997-04-09
1999-11-02
Barlow, John
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Electrical signal parameter measurement system
702 79, G01R 2500
Patent
active
059787414
ABSTRACT:
Line voltage and line current signals are sensed on a power line having at least one conducting path. The sensed line voltages and line currents are converted into a digital signal. A phase-to-neutral voltage signal and phase current signal are computed from the digital signal to thereby define a phase of the power line. An interval of orthogonality is determined from the sensed voltage and current signals, coinciding with passage of an integral number of cycles of a fundamental frequency reference signal which is computed from the computed phase-to-neutral voltage signal. A vector metering quantity is computed for the determined interval of orthogonality from the computed phase-to-neutral voltage signal and the computed phase current signal. The vector metering quantities to be computed may be identified and computed based upon an associated detent. The vector metering quantity is also computed based on an identified circuit topology.
REFERENCES:
patent: 4131847 (1978-12-01), Kohga et al.
patent: 4454471 (1984-06-01), Schwendtner et al.
patent: 4937520 (1990-06-01), Arseneau et al.
patent: 5198751 (1993-03-01), Nakamura
patent: 5229713 (1993-07-01), Bullock et al.
patent: 5243536 (1993-09-01), Bradford
patent: 5657237 (1997-08-01), Mazzoni
Curtis et al., Definitions of Power and Related Quantities, A.I.E.E. Summer Convention, Ithaca, New York, Jun. 24-28, 1935.
Bullock et al., MinD Ur Ps & Qs: Four Powers, Computed from Voltages and Currents Under IEEE Std-100, Meet Rational Metering Requirements, EEI-AEIC Meter and Service Committee meeting, Fairmont Hotel-Dallas, Texas, Mar. 27-30, 1994.
Mack, Function Spaces and Fourier Series, Chapter 15, The General Electric A Course Engineering Analysis, pp. 366-373.
Rosenau, Phasor, Apparent and Arithmetic Apparent AC Power, GE Meter Department Technote-03, Jun. 8, 1994.
Bullock et al., Measurement of Polyphase Reactive Power, GE Meter Department, Aug. 1993.
Bullock et al., An Analysis of a Sampling A.C. Wanhour Meter, GE Meter Department, Technote-06, Apr. 1994.
IEEE, IEEE Standard Dictionary of Electrical and Electronics Terms, Fourth Edition, 1988, pp. 21, 47, 281, 550-551, 690, 729, 730, 791.
Elmore David D.
Mammen Jeffrey W.
Staver Daniel A.
Barlow John
Miller Craig Steven
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