METHOD OF DETECTING A FAULT IN A MONITORED SECTION OF AN ELECTRIC TRANSMISSION LINE USING DISTANCE PROTECTION TECHNIQUES

摘要

A method of detecting a fault in a monitored section of an electric line. A release signal and a direction signal are generated, in the event of a fault, by a measuring unit fitted at each end of every section of the line. The direction signal is transmitted via a low-transmission-capacity line from one measuring unit to another measuring unit. Each measuring unit produces, after generating the release signal, intermediate parameters which are suitable for calculating the location of the fault. The intermediate parameters are transmitted via the data-transmission line to the other measuring unit in the section where, in each case, a value is obtained indicating the location of the fault.