Fehlerpositionserkennung und Distanzschutzvorrichtung sowie Zugehöriges Verfahren

Details

Veröffentlichungs-Nr.

EP3088906

Aktenzeichen

EP15275126

Anmeldetag

30. April 2015

Veröffentlichung

30. August 2017

Erteilung

30. August 2017

Rechtsraum

EP

IPC

G01R31/08H02H3/04

Abstract

An apparatus for determining a fault location distance or distance protection in a multi-phase power transmission medium, the apparatus configured to; determine a set of line fault parameters u<p>, i<PR>, i<PX>and i<P0>based on a measurement sample of voltage and current values at a measurement point for phases of a multi-phase current of said power transmission medium and a fault type, the set of line fault parameters determined at a plurality of sample times, n; determine a derivative with respect to time of one of the line fault parameters i<PX>representative of an inductive part of measured faulty phase current; determine a set of phasorsU̇P(n),İPR(n),İPX(n), andİP0(n) using a Fourier transformation of the derivative and of the remaining line fault parameters at the plurality of sample times and use said set of phasors to determine a fault location distance or distance projection distance along the power transmission medium; wherein, the determination of the fault location distance or the distance protection distance is based on the line equation; <img class="EMIRef" id="472131793-ia01" /> whereU̇P,İPRandİPXcomprise the Fourier transforms of the line fault parameters u<p>, i<PR>and the derivativeiPX,U̇Fis a Fourier transform of the voltage at the fault location, R<1>is a positive sequence resistance of the power transmission medium per length (ohm/km), D<F>is the fault location distance, X<1>is a positive sequence reactance of the power transmission medium per length (ohm/km) and ω<0>is the fundamental angular frequency where ω<0>=2πf<0>and f<0>is the fundamental frequency of the current of the power transmission medium.

Anmelder

Firma

General Electric Technology GmbH

Land

🇨🇭 Schweiz

Fachgebiete