公开(公告)号：EP0078183A2

公开(公告)日：1983-05-04

申请号：EP82305720.3

申请日：1982-10-27

Applicant: THE GENERAL ELECTRIC COMPANY, p.l.c.

Inventor： Wright, Arthur ,  Christopoulos, Christos

IPC: G01R31/08 ,  G01R31/11

CPC classification number: G01R31/088 ,  G01R31/11 ,  H02H7/265

Abstract: The position of a fault occurring in an electric power transmission line (1) is determined by "labelling" a voltage or current pulse originating from the fault and reflected by the end of the line, or some other point in the system, moving back towards the fault, and then measuring the time taken from the labelled pulse to return to the measuring point near the end of line. The "labelling" is achieved by predicting from known data and the time of arrival of the reflected pulse the amplitude of the voltage pulse and comparing the prediction with the measured valve. Apparatus for carrying out the method is described.