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US 4,384,246 AGranted
Series-thyristor subsynchronous damper for power generators
AssigneeGeneral Electric Company
InventorsEinar V. Larsen, Daniel H. Baker, Colin E. J. Bowler
Life of this patent
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Abstract
A voltage source is connected in series with the neutral secondary winding on a generator step-up transformer through an electrical reactance. A control circuit and a pair of thyristor banks are employed to apply the voltage source to the transformer winding to dampen sybsynchronous resonance currents and to prevent torsional mode vibrations from occurring within the generator.
Claims10
In a system comprising a voltage generator having a step-up transformer, a circuit for damping subsynchronous resonance oscillations occurring in voltage generators comprising:
- a pair of thyristors connected in series with one of the windings of a step-up transformer connected with a voltage generator;
- an electrical reactor connected in series with a voltage source and with said thyristors for supplying electrical current to said transformer to cancel any subsynchronous resonance current flow to said voltage generator.
Dependencies are inferred from the claim text.