Protective relaying system

Details Protective relaying system Protective relaying system

1977-12-23

1980-01-08

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Series connected sections with faulty section disconnect

324 51, 361 79, 364480, 364482, H02H 328

Patent

active

041830725

ABSTRACT:
A protective relaying system including a protected AC transmission line and detection means for detecting a change in propagation mode of a traveling wave propagating along the transmission line. The transmission line has a pair of line ends and a surge propagation time .tau., and the detection means is effective for comparing a value of the traveling wave as it passes one of the line ends at a time t-.tau. and a value of the traveling wave as it passes the other of the line ends at a time t after the surge propagation time has elapsed for detecting a change in wave value resulting from a change in wave propagation mode.

REFERENCES:
patent: 3569785 (1971-03-01), Durbeck et al.
patent: 3590368 (1971-06-01), Esclangon
patent: 3931502 (1976-01-01), Kohlas
patent: 3984737 (1976-10-01), Okamura et al.
patent: 4079435 (1978-03-01), Zaslavskaya et al.

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