Method and device for detecting and correcting a saturated curre

Details Method and device for detecting and correcting a saturated curre Method and device for detecting and correcting a saturated curre

1998-06-04

2000-06-06

Oda, Christine K.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Magnetic saturation

324117R, 324127, G01R 3300

Patent

active

060723106

ABSTRACT:
A method and a device for detecting and correcting a saturated current profile of a current transformer in a particularly simple and reliable way, initially uses a number of logic inquiries derived from sampled values of the present current signal profile to detect a start of saturation on the basis of a pattern recognition. An end of saturation is subsequently determined, likewise with the aid of a number of logic inquiries. A saturation signal is then formed from a combination of the logic inquiries. In the case of the detection of saturation, the current sampled values are discarded, and an image of the unsaturated current signal profile is reconstructed from a number of sampled values determined ahead of the time of detection of saturation.

REFERENCES:
International Application WO 93/13581 (Bjoerklund et al.), dated Jul. 8, 1993, Reconstruction of saturated current transformer signals.

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