Digital protective relay

Details Digital protective relay Digital protective relay

1988-09-26

1989-12-05

DeBoer, Todd E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

361 94, 364483, H02H 3253

Patent

active

048856568

ABSTRACT:
In a digital protective relay, the amplitude value calculation is performed using three sampling values and the calculation result is obtained at high speed, and even if the frequency is varied the calculation is performed with high accuracy. Thereby performance of the digital protective relay can be significantly improved.

REFERENCES:
patent: 4631625 (1986-12-01), Alexander et al.
patent: 4672501 (1987-06-01), Bilac et al.
patent: 4774621 (1988-09-01), Andow
Japan Electric Society, "Protective Relay Engineering", p. 112, Jul. 20, 1981.

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