H - Electricity – 02 – H
Patent
H - Electricity
02
H
321/21, 321/23
H02H 7/12 (2006.01) H02J 1/00 (2006.01) H02J 3/36 (2006.01)
Patent
CA 1061861
PROTECTION SYSTEM AND METHOD FOR HIGH VOLTAGE DIRECT CURRENT TRANSMISSION SYSTEM Abstract of the Disclosure One of two converters connected by a direct current transmission line is made to operate as a rectifier and the other is made to operate as an inverter under normal operation. When a fault occurs on the transmission line and is detected, two of the series connected thyristor arms in one of the converters are made to operate as a bypass pair while the other converter is made to operate as a rectifier controlled by a constant current control means with a suitable reference. This enables the fault to be cleared without stopping current flow in the line.
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