Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system
Patent
1997-09-15
2000-06-27
Wachsman, Hal
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Electrical signal parameter measurement system
702 58, 700292, 700293, 700294, 361 78, H02H 300
Patent
active
060817682
ABSTRACT:
A method and system for detecting the peak of respective half-cycles of a sinusoidal waveform. The sinusoidal waveform is rectified and only sample points above a first threshold are analyzed. The peaks of each half-cycle are only accepted if they are above a second, greater threshold. Peaks below the second threshold are not accepted. The peaks themselves are detected by starting a counter at the first sample in the rectified waveform which is above the first threshold value. Once the rectified waveform descends below the first threshold, the counter is stopped and the maximum value of the previous k samples is the peak value, where k is the counter value for the successive samples above the first threshold. The peak value so determined is rejected if it is less than the second threshold value. On the other hand, when the peak value is above the second threshold, it is averaged with the last valid peak value (above the second threshold). Thus, the V/Hz value remains the same until a new, valid peak is determined. A preferred embodiment implements such a digital peak detector in a digital relay system for detecting overexcitation of a power system.
REFERENCES:
patent: 4539618 (1985-09-01), Stich
patent: 4639817 (1987-01-01), Cooper et al.
patent: 4694374 (1987-09-01), Verbanets, Jr.
patent: 4722059 (1988-01-01), Engel et al.
patent: 4725914 (1988-02-01), Garitty
patent: 4939617 (1990-07-01), Hoffman et al.
patent: 5224011 (1993-06-01), Yalla et al.
patent: 5315527 (1994-05-01), Beckwith
patent: 5422778 (1995-06-01), Good et al.
patent: 5475312 (1995-12-01), Sedding et al.
patent: 5740064 (1998-04-01), Witte et al.
Benco Joseph P.
Hart David G.
Hu Yi
Stoupis James D.
ABB Power T&D Company Inc.
Wachsman Hal
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