Series capacitor system with force firing of protective bypass d

Details Series capacitor system with force firing of protective bypass d Series capacitor system with force firing of protective bypass d

1977-02-09

1978-10-17

Miller, J D

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

361 16, 361 20, H02H 706

Patent

active

041212703

ABSTRACT:
In a series capacitor transmission system the protective bypass device has a force firing arrangement responsive to an applied signal for causing the series capacitor bank to be bypassed rapidly, such as within three cycles, for reducing subsynchronous oscillation effects on generating equipment connected with the transmission system. A capacitive potential device supplies power to energize a firing control circuit with a pulse transformer placing high frequency or pulse voltage across the protective device for rapid bypassing. The bypass device may be a protective spark gap as is normally present for protection of the capacitor bank against overvoltages.

REFERENCES:
patent: 3319121 (1967-05-01), Lee
patent: 4012667 (1977-03-01), Ishida et al.
"Series Capacitors in Power Systems," by Fahlen, et al. IEEE Transactions on Power Apparatus and Systems, vol. PAS-94 No. 3 May-Jun. 1975.

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