Overvoltage protection for a direct current transmission

Details Overvoltage protection for a direct current transmission Overvoltage protection for a direct current transmission

1975-06-19

1977-05-10

Shoop, William M.

321 27R, H02M 700

Patent

active

040230872

ABSTRACT:
A rectifier station for high voltage direct current transmission includes a rectifier bridge with a control system. In order to limit the direct voltage of the station in the event of disturbances, the control system is provided with arrangements for sensing the direct voltage of the station and the derivative of such voltage. The arrangement supplies signals to limit the voltage increase of the station when the voltage and derivative exceed given values by increasing the delay angle of the station.

REFERENCES:
patent: 3358211 (1967-12-01), Ekstrom
patent: 3417291 (1968-12-01), Johansson
patent: 3447063 (1969-05-01), Hammarlund
patent: 3458797 (1969-07-01), Larsen
patent: 3487286 (1969-12-01), Persson
patent: 3526779 (1970-09-01), Uhlmann

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