Verbesserungen an oder im Zusammenhang mit Gleichstromschutzschemata

Details

Veröffentlichungs-Nr.

EP3093675

Aktenzeichen

EP15275137

Anmeldetag

14. Mai 2015

Veröffentlichung

16. Januar 2019

Erteilung

16. Januar 2019

Rechtsraum

EP

IPC

G01R31/08H02H7/26

Abstract

There is provided a DC protection scheme (10, 110, 210, 310, 410, 510) for protecting a DC power transmission medium (16, 116, 216) within a DC electrical power network (12). The DC protection scheme (10, 110, 210, 310, 410, 510) comprises: a protection device (14, 114, 214) coupled in use to a DC power transmission medium (16, 116, 216), the protection device being operable to protect the DC power transmission medium (16, 116, 216) from an electrical fault; a measurement apparatus to selectively measure at least one electrical property of the DC power transmission medium (16, 116, 216); and a controller (18, 118, 218) programmed to: (i) determine the direction of the electrical fault by comparing the forward and backward travelling waves derived from the or each measured electrical property; (ii) determine whether the electrical fault is an internal or external fault by comparing the first and second frequency components derived from the or each measured electrical property, wherein the frequency of the first frequency component is higher than the frequency of the second frequency component; and (iii) operate the protection device (14, 114, 214) to protect the DC power transmission medium (16, 116, 216) if the determination of the direction of the electrical fault and/or the determination of whether the electrical fault is an internal or external fault meet a predefined criterion.

Anmelder

Firma

General Electric Technology GmbH

Land

🇨🇭 Schweiz

Fachgebiete