Digital protective relaying systems

Details Digital protective relaying systems Digital protective relaying systems

1982-02-03

1983-02-01

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

361 84, 361 81, 361 68, 364492, 364480, 364483, H02H 330

Patent

active

043719082

ABSTRACT:
In a digital protective relaying device for protecting electric power transmission line including an electric station at each end thereof, and each electric station including at least one circuit breaker to be tripped by a protective relay for protecting the own station, a digital protective relay provided with a computer is further provided at each end so as to receive electrical data in digital form from the electric stations for operating in an ordinary protective operation. As a control condition occurs in one station, the condition is sent to a digital protective relay provided at the other end of the transmission line, thereby changing the operational steps of the computer included in the protective relay.

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patent: 3590368 (1971-06-01), Esclangon
patent: 3599044 (1971-08-01), Takemura et al.
patent: 3643160 (1972-02-01), Ray et al.
patent: 3842249 (1974-10-01), Geyer et al.
patent: 3984737 (1976-10-01), Okamura et al.
patent: 4148087 (1979-04-01), Phadke
patent: 4161027 (1979-07-01), Russell
patent: 4228467 (1980-10-01), Okita et al.

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