Distanzschutz zur Fehlererkennung

Details

Veröffentlichungs-Nr.

EP4618344

Aktenzeichen

EP24162671

Anmeldetag

11. März 2024

Veröffentlichung

17. September 2025

Rechtsraum

EP

IPC

H02H3/40

Abstract

The present invention provides a method and device for determining a symmetrical fault in a three-phase transmission line. The method comprises the steps of obtaining a real time current signal and a real time voltage signal at relay location of one end of the transmission line for each of measured phase loops, determining a reach point voltage signal phasor and a relay point voltage signal phasor based on the real time current signal and the real time voltage signal for each of measured phase loops, determining an operation signal and a restrain signal for each of measured phase loops, determining whether the operation signal exceeds the restrain signal for a measured phase loop, and detecting a fault if it is determined that the operation signal exceeds the restrain signal or the cosine of an angle difference between the relay location phasor and the reach point of voltage phasor is below zero.

Anmelder

Firma

Hitachi Energy Ltd

Land

🇨🇭 Schweiz

Fachgebiete