Apparatus for comparing two waveforms in real time

Details Apparatus for comparing two waveforms in real time Apparatus for comparing two waveforms in real time

1995-05-30

1997-08-19

Brown, Glenn W.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Phase comparison

324 7655, 324 7658, 324 7677, 324771, 364487, G01R 2500

Patent

active

056592426

ABSTRACT:
A numerical comparator is disclosed. The numerical comparator employs numerical techniques based upon the behavior of the cylinder unit to compare phasors in real time. In one application of this invention, 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.

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