Patent · US Expired

Method and device for detecting and correcting a saturated current profile of a current transformer

US6072310A · kind A · utility

9Cited by

0References

8Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Rainer Krebs · Schopfheim, DE
Anil Kumar · Kanchinakote, IN
Jörg Ammon · Erlangen, DE

Key dates

Filing date	Jun 4, 1998
Grant date	Jun 6, 2000
Priority date	—
Expiry date	Jun 4, 2018

Classification

Technology area (CPC H)Electricity
CPC primaryH02H1/046
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.