Global Patent Index - EP 1092256 A1

EP 1092256 A1 2001-04-18 - 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

EP 1092256 A1 (EN)

Application

EP 99930026 A

Priority

  • SE 9900900 W
  • SE 9801906 A

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 (main, further and additional classification)

H02J 3/36

IPC 8 full level (invention and additional information)

H02H 7/26 (2006.01); H02J 3/36 (2006.01)

CPC (invention and additional information)

H02J 3/36 (2013.01); H02H 7/268 (2013.01); Y02E 60/60 (2013.01)

Citation (search report)

See references of WO 9963641A1

Designated contracting state (EPC)

DE FR GB SE

EPO simple patent family

WO 9963641 A1 19991209; EP 1092256 A1 20010418; SE 512084 C2 20000124; SE 9801906 D0 19980529; SE 9801906 L 19991130

INPADOC legal status


2005-06-01 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20041201

2001-04-18 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20001222

2001-04-18 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB SE