A New Strategy for Determining Fault Zones in Distance Relays

A new strategy (denoted P-SS) for estimating the correct fault zone in distance relays is introduced. The main difference between the P-SS and conventional setting strategies is that the P-SS does not depend on fixed boundaries for backup zones. It depends on exchanging information between local rel...

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Bibliographic Details
Published in:IEEE transactions on power delivery 2008-10, Vol.23 (4), p.1857-1863
Main Authors: Gilany, M., Al-Kandari, A., Madouh, J.
Format: Article
Language:English
Subjects:
Applied sciences
Availability
Backups
Boundaries
Circuit faults
Commands
Connection and protection apparatus
Distance relays
Electrical engineering. Electrical power engineering
Exact sciences and technology
Exchanging
fault zones
Faults
Impedance
Integrated circuit interconnections
Networks
pilot schemes
Power system faults
Power system protection
Power system relaying
Protective relaying
Relays
setting problems
Stations
Strategy
Substation protection
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Description
Summary:A new strategy (denoted P-SS) for estimating the correct fault zone in distance relays is introduced. The main difference between the P-SS and conventional setting strategies is that the P-SS does not depend on fixed boundaries for backup zones. It depends on exchanging information between local relays in the same station in addition to a command from the remote end relay. With the proposed strategy, zone-1 covers the entire length of the protected line, zone-2 covers the entire length of any next line irrespective of its length, and zone-3 covers the entire length of any line next to zone-2. The governing rules for the proposed strategy are presented. The strategy is examined against a wide range of setting problems of a real part of a high-voltage network with real relay settings. The results confirm that the P-SS achieves the required accurate, sensitive, and selective relay operation.
ISSN:0885-8977
1937-4208
DOI:10.1109/TPWRD.2008.2002871