General Electric Company

Daniel Herbert Baker

Einar Vaughn Larsen

John Michael Kern

William H Sahm, Iii

Bruce Edward English

Stanley A Miske, Jr

Colin E Bowler

An apparatus for detecting currents in a three-phase power transmission system includes a first detection circuit electrically coupled to a first phase of the three-phase transmission system, a second detection circuit electrically coupled to a second phase of the three-phase transmission system different than the first phase, and an event output switch electrically coupled to the first detection circuit and the second detection circuit and configured to actuate when a subsynchronous current at least one of the first phase and the second phase exceeds a pre-selected subsynchronous current setpoint.

Method and apparatus for detecting current

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.

Series-thyristor subsynchronous damper for power generators

Growing community of inventors

Cambridge, NY, United States of America

Daniel Herbert Baker