Determining location of faults in power transmission lines

Details Determining location of faults in power transmission lines Determining location of faults in power transmission lines

1982-10-26

1985-02-12

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

G01R 3108

Patent

active

044994176

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 for 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 value. Apparatus for carrying out the method is described.

REFERENCES:
patent: 2493800 (1950-01-01), Biskeborn
patent: 2628267 (1953-02-01), Stringfield et al.
patent: 2725526 (1955-11-01), Stringfield et al.
patent: 3462681 (1969-08-01), Biskup
patent: 3609533 (1971-09-01), Pardis
patent: 4241305 (1980-12-01), Dickerson
patent: 4316139 (1982-02-01), Root

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