A HIGH VOLTAGE DC SWITCHYARD WITH SEMICONDUCTOR SWITCHES

摘要

A high voltage DC switchyard (40) comprises at least one busbar (41, 42), at least two DC lines (43-46) connected to said at least one busbar through DC breakers (50-55) comprising a section of at least one semiconductor device (48) of turn-off type and rectifying member (49) in anti-parallel therewith. At least one said DC line is connected to at least one said busbar through a unidirectional said DC breaker (50, 52, 53, 55), i.e. a DC breaker that may only block current therethrough in one direction.