Direct-current breaker for high power for connection into a dire

Details Direct-current breaker for high power for connection into a dire Direct-current breaker for high power for connection into a dire

1994-12-05

1996-05-14

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Arc suppression at switching point

361 3, 361 8, H02H 3033

Patent

active

055173780

ABSTRACT:
A high power d.c. breaker for connection into a d.c. carrying high-voltage line (L), has two normally closed and electrically series-connected mechanical breaks (BSI, BSII) adapted to be traversed by the line current (I) and to be opened for breaking the current. A capacitor (CB) is connected in parallel with the series connection of the breaks. A semiconductor member (HO) is connected in parallel with one of the breaks (BSI). Upon opening the breaks, a control member (SO) controls the semiconductor member such that a zero crossing of the current through the second break (BSII) is obtained, whereby the line current (I) is commutated over to the capacitor. (FIG. 1)

REFERENCES:
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patent: 4216513 (1980-08-01), Tokuyama et al.
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patent: 5214557 (1993-05-01), Hasegawa et al.
Abstract of SU 964758A May 14, 1981.
Description and Prospective Applications of New Multi Terminal HVDC System Concepts; Knudsen et al; Cigre; 1990 Session.
Entwicklung und Erprobung eines Versuchsschalters fur die Hochspannungs-Gleichstrom-Ubertragung; 30 Aug. 68; pp. 421-423.

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