Verfahren zum Löschen eines Fehlers in einem elektrischen HVDC-Netzwerk

Details

Veröffentlichungs-Nr.

EP3046196

Aktenzeichen

EP15275019

Anmeldetag

16. Januar 2015

Veröffentlichung

15. Mai 2019

Erteilung

15. Mai 2019

Rechtsraum

EP

IPC

H02H3/06H02H7/26H02J3/36

Abstract

In the field of high voltage direct current (HVDC) electrical networks there is a need to clear various faults which may arise from time to time. A method of clearing a fault in a high voltage DC electrical network (10; 80), which includes at least three power converters (12, 14, 16, 18) that are interconnected by at least a first DC power transmission medium (20), comprises the steps of: (a) detecting a fault (68; 72) in the first DC power transmission medium (20) and in response reconfiguring each power converter (12, 14, 16, 18) from a normal power transmission mode to a fault blocking mode to drive the resulting DC fault current (I Fault ) flowing in the first DC power transmission medium (20) towards zero; (b) locating the fault (68; 72) in the first DC power transmission medium (20) and isolating a faulty portion (62) of the first DC power transmission medium (20) from a healthy remaining portion (64) of the first DC power transmission medium (20); (c) reconfiguring at least one of the power converters (12, 14, 16, 18) designated as a re-energising power converter (66) from the fault blocking mode to a reenergising mode to re-energise the healthy remaining portion (64) of the first DC power transmission medium (20); and (d) detecting a rise in the voltage level in the healthy remaining portion (64) of the first DC power transmission medium (20) above a first threshold level and in response reconfiguring the or each remaining power converter (12, 14, 16, 18) connected with the healthy remaining portion (64) of the first DC power transmission medium (20) from the fault blocking mode to the normal power transmission mode.

Anmelder

Firma

General Electric Technology GmbH

Land

🇨🇭 Schweiz

Fachgebiete