EP 1092256 A1 20010418 - DETECTION OF FAULTS ON TRANSMISSION LINES IN A BIPOLAR HIGH-VOLTAGE DIRECT CURRENT SYSTEM
Title (en)
DETECTION OF FAULTS ON TRANSMISSION LINES IN A BIPOLAR HIGH-VOLTAGE DIRECT CURRENT SYSTEM
Title (de)
FEHLERERFASSUNG IN ÜBERTRAGUNGSLEITUNGEN IN EINER BIPOLAREN HOCHSPANNUNGSGLEICHSTROMÜBRETRAGUNGSANLAGE
Title (fr)
DETECTION DE DEFAUTS SUR LES LIGNES DE TRANSMISSION D'UN SYSTEME CC HAUTE TENSION BIPOLAIRE
Publication
Application
Priority
- SE 9900900 W 19990527
- SE 9801906 A 19980529
Abstract (en)
[origin: WO9963641A1] A method and a device for detection of a fault on a transmission line in a bipolar HVDC installation where, on the basis of the current and voltage of each pole and the impedance of the transmission lines and the ground line, one positive and one negative pole-wave signal and one ground-wave signal are formed and that one first and one second difference signal are formed as the difference between two consecutive samples of the pole-wave signals and that a fault is detected if a first criterion, namely if any of the difference signals is greater than a set value, is fulfilled, and if a second criterion, namely if the numerical value of the difference between the difference signals is smaller than the product of the greatest of the difference signals and a set factor, is fulfilled, and if a third criterion, namely that a ground-wave signal has been detected, is fulfilled.
IPC 1-7
IPC 8 full level
CPC (source: EP)
H02H 7/268 (2013.01); H02J 3/36 (2013.01); Y02E 60/60 (2013.01)
Citation (search report)
See references of WO 9963641A1
Designated contracting state (EPC)
DE FR GB SE
DOCDB simple family (publication)
WO 9963641 A1 19991209; EP 1092256 A1 20010418; SE 512084 C2 20000124; SE 9801906 D0 19980529; SE 9801906 L 19991130
DOCDB simple family (application)
SE 9900900 W 19990527; EP 99930026 A 19990527; SE 9801906 A 19980529