Method and System for detecting and reducing draft tube...

Details Method and System for detecting and reducing draft tube... Method and System for detecting and reducing draft tube...

2006-04-25

2006-04-25

Knight, Anthony (Department: 2121)

Data processing: generic control systems or specific application

Specific application, apparatus or process

Mechanical control system

C700S286000, C700S287000, C073S035090, C073S035050, C073S570000, C073S607000, C073S862410, C073S862590

Reexamination Certificate

active

07035718

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.

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Specifications and Ordering Information 3500/46M Hydro Monitor, [online]; [retrieved on Jan. 14, 2004]; retrieved from the Internet at http://www.bently.com/prod/products/144408.htm.
Overview of the 3500 Monitoring System of Bently Nevada, [online]; [retrieved on Jan. 14, 2004]; retrieved from the Internet at http://www.geocities.com;alfiefernandes/bentlynevada.htm.
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