Method and device for determining the direction to a fault on a

Details Method and device for determining the direction to a fault on a Method and device for determining the direction to a fault on a

1994-12-15

1996-11-05

Wieder, Kenneth A.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

For fault location

324539, 361 66, 361115, 364483, G01R 3102, H02H 338, H04B 346

Patent

active

055721389

ABSTRACT:
A method and a device for determining the direction to a fault on a power transmission line in relation to a measuring station with the aid of phase currents and voltages, measured in the measuring station, by means of which change values .DELTA.U in the phase voltage, change values in the phase voltage .DELTA.UM of a line model and change values in the derivative .DELTA.I' of the phase current can be determined, and wherein for each measuring loop phase-ground the signal .DELTA.QL=(.DELTA.U-.DELTA.UM).multidot..DELTA.UI' is formed and if this value is smaller than a negative value assumed in advance, a fault lying ahead, in relation to the measuring station, has been detected, and wherein for each measuring loop phase-ground the signal .DELTA.QB =.DELTA.U.multidot..DELTA.UI' is formed and if this value is greater than a positive value assumed in advance, a fault lying behind, in relation to the measuring station, has been detected.

REFERENCES:
patent: 3878460 (1975-04-01), Nimmersjo
patent: 4251766 (1981-02-01), Souillard
patent: 4351011 (1982-09-01), Liberman
patent: 4352137 (1982-09-01), Johns
patent: 4371907 (1983-02-01), Bignell
patent: 4560922 (1985-12-01), Heller et al.
patent: 4731688 (1988-03-01), Nimmersjo et al.
patent: 4731689 (1988-03-01), Nimmersjo et al.
patent: 4797805 (1989-01-01), Nimmersjo
patent: 4922368 (1990-05-01), Johns

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