Title :
Distance protection performance during simultaneous faults
Author_Institution :
University College, Electrical Engineering Department, Cardiff, UK
fDate :
2/1/1977 12:00:00 AM
Abstract :
The paper considers the performance of both unswitched and switched distance protection schemes using polarised-mho relays on systems subjected to simultaneous faults. The disturbances considered are flashoverfaults to earth, cross-country earth faults and open-conductor plus earth faults on a double-circuit 132 kV transmission system. Consideration is also given to protection performance for double earth faults separatedby a star-delta transformer. Differences in protection philosophies of British and Continental relay manufacturers are highlighted and a comparison is given for switched schemes employing overcurrent starter units.
Keywords :
fault currents; overcurrent protection; power system protection; relay protection; transmission networks; distance protection; disturbances; double circuit 132 kV transmission system; earth faults; flashover; overcurrent; protection performance; relay; simultaneous faults; switched schemes; unswitched schemes;
Journal_Title :
Electrical Engineers, Proceedings of the Institution of
DOI :
10.1049/piee.1977.0025