Verbesserungen an oder im Zusammenhang mit Elektrischen Leistungssystemen

Details

Veröffentlichungs-Nr.

EP3159990

Aktenzeichen

EP15275221

Anmeldetag

22. Oktober 2015

Veröffentlichung

31. Januar 2018

Erteilung

31. Januar 2018

Rechtsraum

EP

IPC

H02H1/00G01R31/08H04J3/06H04L12/40// H02H3/28H02H7/26

Abstract

In the field of differential protection schemes for electrical power systems there is a need to employ a synchronization technique to enable time alignment of local terminal current with received current from a remote terminal in order reliably to operate the differential protection scheme. A method of determining a communication time delay (14 R1 , 14 R2 , 14 R3 , 14 R4 , 14 R5 ) in a communication network between a local terminal (L) and each of a plurality of remote terminals (R1, R2, R3, R4, R5) in a multi-terminal multi-junction electrical power system (10) comprises the steps of: (a) calculating a respective initial communication time delay (Tp1, Tp2, Tp3, Tp4, Tp5) between each remote terminal (R1, R2, R3, R4, R5) and the local terminal (L); (b) calculating a respective junction time delay (T 12 , T 23 , T 34 ) between respective first, second and third pairs (16, 18, 20) of adjacent junctions (J1, J2, J3, J4); and (c) correcting the calculated initial communication time delay (Tp1, Tp2, Tp3, Tp4, Tp5) of each remote terminal (R1, R2, R3, R4, R5) spaced from the local terminal (L) by two or more junctions (J1, J2, J3, J4) according to each corresponding junction time delay (T 12 , T 23 , T 34 ) arising between the or each said remote terminal (R1, R2, R3, R4, R5) and the local terminal (L).

Anmelder

Firmen

General Electric Technology GmbH
ALSTOM Technology Ltd

Land

🇨🇭 Schweiz

Fachgebiete