Waveform reconstruction from distorted (saturated) currents

Details Waveform reconstruction from distorted (saturated) currents Waveform reconstruction from distorted (saturated) currents

1997-11-10

1999-10-26

Wachsman, Hal Dodge

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

702 70, 702191, 702195, 702126, 361 87, 324620, G01R 2320

Patent

active

059743611

ABSTRACT:
A method employed in a condition monitoring unit (CMU) for monitoring a circuit breaker or interrupter to obtain a substantially undistorted version of a waveform suffering from saturation distortion comprises employing a current transformer (CT) to measure a current waveform. The output of the CT is prone to be a partially distorted waveform. The invention is generic in the sense that it does not require parameters associated with the CT characteristics or with the burden impedance on the secondary side of the CT. A digital representation of the partially distorted waveform is obtained, and then undistorted portions of the partially distorted waveform are identified by comparing the amplitude of the partially distorted waveform within a sliding window to a pair of boundary values and identifying as undistorted those portions having an amplitude between the boundary values. Next, distorted portions of the waveform are separated from the undistorted portions, thereby yielding a data record with holes. Finally, a reconstructed waveform is formed by filling in the holes with data points representing an undistorted version of the observed waveform.

REFERENCES:
patent: 5293295 (1994-03-01), Nishitani
patent: 5343404 (1994-08-01), Girgis
patent: 5629869 (1997-05-01), Johnson et al.
patent: 5673210 (1997-09-01), Etter

Affiliated with

Also associated with

Rating

Waveform reconstruction from distorted (saturated) currents does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Waveform reconstruction from distorted (saturated) currents, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Waveform reconstruction from distorted (saturated) currents will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-774973