EP 1470625 A1 20041027 - METHOD FOR DETECTING SATURATION IN A CURRENT TRANSFORMER
Title (en)
METHOD FOR DETECTING SATURATION IN A CURRENT TRANSFORMER
Title (de)
VERFAHREN ZUR DETEKTION VON SÄTTIGUNG EINES STROMWANDLERS
Title (fr)
PROCEDE DE DETECTION DE SATURATION DANS UN TRANSFORMATEUR DE COUORANT
Publication
Application
Priority
- FR 0300220 W 20030123
- FR 0201043 A 20020129
Abstract (en)
[origin: FR2835319A1] The method is based on an association of at least two saturation criteria enabling detection of a saturation phase when said criteria are met simultaneously. The invention is characterized in that a first saturation criterion (C<sb>e</sb> .<sb> sat</sb>) takes into account the calculation of an instantaneous prediction error ( (Y<sb>k</sb>)) as a function of the differential between the measured secondary current (<i>i</i><sb><i>s</i></sb>) and the secondary current (I<sb>s</sb>) predicted with the aid of a mathematical model, and in that a second saturation criterion (C<SB>F</SB>.<sb>sat</sb>) takes into account the instantaneous algebraic flux (<SP>F</SP>.<sb>mes</sb>) calculated by integration of the sampled secondary current (Y<sb>k</sb>), comparing said algebraic flux to a positive threshold (S+, S'+) and to a negative threshold (S-, S'-). Said comparison is initialized by exaggerating the probabilities of meeting the second saturation criterion at the beginning of the measurement, more particularly by an over-estimation (F_rem_haut) of the absolute value of the remanent flux of the transformer.
IPC 1-7
IPC 8 full level
G01R 15/18 (2006.01); H02H 1/04 (2006.01); H02H 7/04 (2006.01); H02H 6/00 (2006.01)
CPC (source: EP US)
H02H 1/046 (2013.01 - EP US); H02H 6/005 (2013.01 - EP US)
Citation (search report)
See references of WO 03065533A1
DOCDB simple family (publication)
FR 2835319 A1 20030801; FR 2835319 B1 20040312; BR 0302851 A 20040302; CA 2474052 A1 20030807; EP 1470625 A1 20041027; JP 2005516229 A 20050602; US 2005140352 A1 20050630; WO 03065533 A1 20030807
DOCDB simple family (application)
FR 0201043 A 20020129; BR 0302851 A 20030123; CA 2474052 A 20030123; EP 03709899 A 20030123; FR 0300220 W 20030123; JP 2003565003 A 20030123; US 50285504 A 20040728