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US 12,627,135 B2Granted
Distance protection of a transmission line
AssigneeHitachi Energy Ltd
InventorsOd Naidu, Neethu George, Sinisa Zubic, Zoran Gajic
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AssigneeHitachi Energy Ltd
InventorsOd Naidu, Neethu George, Sinisa Zubic, Zoran Gajic
Estimating the term…
The present disclosure relates to a method for distance protection of a transmission line carrying a plurality of phases for a phase-to-phase-to-ground fault comprising a first phase and a second phase of the plurality of phases as faulted phases in the phase-to-phase-to-ground fault, wherein the first phase is different from the second phase, the method comprising: obtaining a first impedance of a first electrical loop formed by a first phase carried on the transmission line and a ground potential based on a zero-sequence current (S601); obtaining a second impedance of a second electrical loop formed by a second phase carried on the transmission line and a ground potential based on the zero-sequence current (S602); computing an apparent impedance of the transmission line and a ground potential based on the transmission line seen at a first terminal based on the first impedance and the second impedance (S603); and performing the distance protection based on the apparent impedance (S604). The present disclosure also relates to a respective device, computer-readable medium, and system.
A method for distance protection of a transmission line carrying a plurality of phases for a phase-to-phase-to-ground fault comprising a first phase and a second phase of the plurality of phases as faulted phases in the phase-to-phase-to-ground fault, wherein the first phase is different from the second phase, the method comprising:
A device for distance protection of a transmission line carrying a plurality of phases for a phase-to-phase-to-ground fault comprising a first phase and a second phase of the plurality of phases as faulted phases in the phase-to-phase-to-ground fault, wherein the first phase is different from the second phase, the device comprising a processor being configured to:
A non-transitory computer-readable medium having instructions stored thereon for a distance protection of a transmission line carrying a plurality of phases for a phase-to-phase-to-ground fault comprising a first phase and a second phase of the plurality of phases as faulted phases in the phase-to-phase-to-ground fault, wherein the first phase is different from the second phase, wherein the instructions, when executed by a processor, cause the processor to:
Dependencies are inferred from the claim text.