Recursive constrained algorithms for short circuit and earth fault protection of generator/transformer unit
Recursive constrained protective relaying algorithms are developed for extracting 50 Hz and 150 Hz components of voltage and current signals of the generator-transformer unit. These frequency components are used for detecting internal short circuit and earth fault conditions of the combined unit. The proposed algorithms were satisfactorily tested for various simulated conditions of the system.
Get full access to this article
View all access options for this article.
References
1.
GEC ALSTHOM protection relay application guide
2.
DaviesT., Protection of Industrial Power Systems, Pergamon Press (1984)
3.
PopeJ. W., ‘A comparison of 100 percent stator ground fault protection schemes for generator stator winding’, IEEE Trans. PAS-103, No. 4, 832–840(1984)
4.
Protection against ground faults covering 100 percent of stator windings. Type GIX 103. Brown Boveri Corporation relay and protection schemes
5.
RajakumarR. V., and PalR. N., ‘Tracking of band pass signals using center frequency adaptive filters’, ASSP, 39, No. 10, pp. 1710–1721(1990)
6.
RaoT. S. M., Power System Protection — Static Relays, Tata McGraw Hill (1979)
7.
BarkleJ. E., and GlassburnW. E., ‘The protection of generators against unbalanced currents,’ AIEE Trans. PAS, Part 3, pp. 282–285 (1953)
8.
VermaH. K., and SoundararajanK., ‘Digital differential relaying for generator protection — Development of algorithms and off line evaluation’, Electric Power Systems Research, 17, pp. 109–117(1989)
9.
GriffinG. H., and PopeJ. W., ‘Generator ground fault protection using over current, over voltage and under voltage relays’, IEEE Trans. PAS, 101, pp. 4490–4501 (1982)
