Productive relay apparatus for protection from sub-synchronous c

Details Productive relay apparatus for protection from sub-synchronous c Productive relay apparatus for protection from sub-synchronous c

1982-10-20

1984-09-04

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Generator protective circuits

361 79, 361 86, 361111, 361113, 340658, H02H 326, H02H 706

Patent

active

044700911

ABSTRACT:
A protective relay for protecting a power system from sub-synchronous current oscillations. The protective relay determines both the amplitude and frequency of sub-synchronous current oscillations occurring in the power system. A series of logic relationships, based in part on the parameters of the power system, are implemented by the protective relay such that when the frequency and amplitude of the sub-synchronous oscillation signal satisfy these relationships a trip signal is produced.

REFERENCES:
patent: 4106071 (1978-08-01), Sun et al.
patent: 4125884 (1978-11-01), Sun
patent: 4208687 (1980-06-01), Sun et al.
patent: 4218718 (1980-08-01), Sun
patent: 4376295 (1983-03-01), Venosono et al.

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