Method and apparatus for locating a fault on a line

Details Method and apparatus for locating a fault on a line Method and apparatus for locating a fault on a line

G - Physics

01

R

324/58.03

G01R 31/08 (2006.01) H02H 7/26 (2006.01)

Patent

CA 1056908

INVENTORS: OTTO LANZ and MICHAEL VITINS INVENTION: METHOD AND APPARATUS FOR LOCATING A FAULT ON A LINE ABSTRACT OF THE DISCLOSURE A method of and apparatus for locating a fault on a line in which there is formed from the voltage and current at a test or measuring location at least one signal (travelling-wave signal) associated with a travelling wave on the line and its variation with time at the test location. There are formed a number of pairs of oppositely moving travelling-wave signals corresponding to the number of phases or conductors of the line and with these travelling- wave signals or signals derived therefrom as integrands there are formed at least two time-integrals each of which is associated with a direction of wave propagation on the line. The time integrals are combined into an evaluation function characterizing the fault direction or fault distance with respect to the test or measuring location, the evaluation function corrsponding to a relation prevailing at the fault location between the oppositely moving travelling waves on the line.

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