A combined directional and faulted phase selector element based on incremental quantities

In this paper, differential incremental or superimposed voltage and current quantities are used in order to determine directionality of a fault in a network. It is shown that this can be accomplished by performing three scalar products between three voltage and current phasor pairs. The relative lev...

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Veröffentlicht in:IEEE transactions on power delivery 2001-10, Vol.16 (4), p.478-484
Hauptverfasser: Benmouyal, G., Mahseredjian, J.
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description In this paper, differential incremental or superimposed voltage and current quantities are used in order to determine directionality of a fault in a network. It is shown that this can be accomplished by performing three scalar products between three voltage and current phasor pairs. The relative levels of these same three scalar products can be furthermore used to identify the faulted phases. While, in ultra-high-speed directional comparison relays, superimposed voltage and current had to be treated in the time domain in order to get speed. In this paper, all computations are done in the frequency domain.
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subjects Differential equations
Electric potential
Fault diagnosis
Faults
Frequency domain analysis
Frequency domains
Helium
Impedance
Laboratories
Networks
Phasors
Protection
Protective relaying
Relays
Scalars
Selectors
Voltage
title A combined directional and faulted phase selector element based on incremental quantities
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