James R Rasmussen

US Patent:

7035718, Apr 25, 2006

Filed:

Jan 27, 2004

Appl. No.:

10/707944

Inventors:

Raymond Verle Jensen - Gardnerville NV, US
James Robert Rasmussen - Bellevue WA, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

G05B 13/00

US Classification:

700280, 700286, 700287, 73 3509, 73 3505, 73570, 73690, 7386241, 7386259

Abstract:

A method and system to reduce vibration in a turbine-generator including measuring a magnitude of radial vibration of a turbine shaft with at least one vibration sensor configured to generate a vibration signal indicative of vibration frequency; measuring a generator power output with a power output sensor configured to generate a generator power output signal; detecting vibration frequencies in a rough load zone range; engaging an air injection means when a magnitude of radial vibration detected in the rough load zone range is above a predetermined threshold; storing a generator power output level as a reference level when engaging the air injection means; and disengaging the air injection means when either the measured generator power output exceeds a predetermined level or the measured generator power output differs from the reference level by a predetermined amount.