Gate controlling apparatus for a thyristor valve

Details Gate controlling apparatus for a thyristor valve Gate controlling apparatus for a thyristor valve

H - Electricity

02

M

321/100, 321/91,

H02M 7/155 (2006.01) H02M 1/08 (2006.01) H02M 1/088 (2006.01) H02M 1/092 (2006.01)

Patent

CA 1063672

GATE CONTROLLING APPARATUS FOR A THYRISTOR VALVE Abstract of the Disclosure A gate controlling apparatus for a thyristor valve including a plurality of series connected thyristors controlled by a narrow gate pulse. The apparatus includes a circuit for judging whether the thyristor valve is to be in the conductive state or not, a circuit for detecting a forward voltage across at least one of the thyristors in the thyristor valve, and an AND circuit for generating an output at a time when an AND condition between the respective outputs of the judging circuit and the forward voltage detector circuit is satisfied. The apparatus further includes a circuit for detecting a period of inverse voltage across at least one of the thyristors in the thyristor valve. The forward and inverse voltages may be, respectively, detected by detecting the forward and inverse voltages of specified thyristors.

249233

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