Process and apparatus for locating faults on a line through the

Details Process and apparatus for locating faults on a line through the Process and apparatus for locating faults on a line through the

1976-04-16

1977-12-13

Strecker, Gerard R.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

G01R 3108

Patent

active

040631621

ABSTRACT:
A process and apparatus for locating faults on a line, wherein at least one signal (travelling-wave signal) associated with a progression thereof at the measuring location is formed from the voltage and current at a measuring location. There are formed travelling-wave signals corresponding in number to the phases or conductors in the line and decoupled from one another in relation to the line inductances and line capacitances. At least two time-integrals are formed with these travelling-wave signals or signals derived therefrom as integrands, each time integral being associated with one direction of wave-propagation on the line. These time-integrals are processed by an evaluating function which characterizes by way of its sign and magnitude the direction and distance of the fault from a predetermined reference location on the line, which function corresponds to a relationship prevailing at the fault location between the travelling waves proceeding in opposite directions on the line.

REFERENCES:
patent: 3281673 (1966-10-01), Richardson
patent: 3590368 (1971-06-01), Esclangon
patent: 3612989 (1971-10-01), Souillard et al.
patent: 3670240 (1972-06-01), Maranchak et al.
patent: 3723864 (1973-03-01), Ricard
patent: 3800215 (1974-03-01), Souillard
patent: 3878460 (1975-04-01), Nimmersjo
patent: 3931502 (1976-01-01), Kohlas
patent: 3983377 (1976-09-01), Vitins

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