Fehlerlokalisierung in einem Hvdc-System

Details

Veröffentlichungs-Nr.

EP3767314

Aktenzeichen

EP19187156

Anmeldetag

18. Juli 2019

Veröffentlichung

30. August 2023

Erteilung

30. August 2023

Rechtsraum

EP

IPC

G01R31/08H02J3/36G01R31/11

Abstract

A controller (101,102) for a High Voltage Direct Current (HVDC) system, the HVDC system comprising two stations (S1, S2) between which power is conducted via a pair of conductors (110; 120) connected between converters (111, 121, 112, 122) acting as rectifiers (111, 121) and inverters (112, 122) and a Dedicated Metallic Return conductor (DMR) or an Electrode Line (EL) (130) installed between the neutral points of the stations (S1, S2), wherein the controller (101,102) comprises a converter firing controller (11) controlled by a control subsystem (12) and configured to output valve firing pulses according to a converter firing control sequence to the converters (111,112, 121,122) to generate a balanced current flow in the conductors (110; 120), characterized in that: the control subsystem (12) is configured to alter the converter firing control sequence generated by the firing controller (11) such as to introduce unbalance of current flow in the DMR or EL (130); and the controller (101, 102) further comprises a fault locator (10) configured to locate faults by measuring the current (103) flowing in the DMR or EL (130).

Anmelder

Firmen

Hitachi Energy Ltd
Hitachi Energy Switzerland AG
ABB Power Grids Switzerland AG
ABB Schweiz AG

Land

🇨🇭 Schweiz

Fachgebiete