Process for producing time dependent waveforms of positive and n

Details Process for producing time dependent waveforms of positive and n Process for producing time dependent waveforms of positive and n

1997-08-06

1998-06-09

Brown, Glenn W.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Analysis of complex waves

324 7635, 324771, 364483, 364487, G01R 1900, G01R 23175

Patent

active

057640440

ABSTRACT:
A numerical comparator employs numerical techniques based upon the behavior of the cylinder unit to compare phasors in real time. In one application, the torque signal generated by the numerical comparator, M.sub.k+1, is employed to determine whether a fault has occurred in a transmission line. Another application involves employing the output M.sub.k+1 to determine the direction of power flow in the transmission line. In yet another application, the output M.sub.k+1 is used to determine whether a voltage or current has exceeded a predetermined threshold. In yet another application, time dependent waveforms of positive and negative symmetrical sequence components are digitally produced.

REFERENCES:
patent: 4314193 (1982-02-01), Mortonson
patent: 4968960 (1990-11-01), Bouhenguel et al.
patent: 5498955 (1996-03-01), Fujii et al.

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