Christopher Adam Meadows

US Patent:

8474268, Jul 2, 2013

Filed:

Aug 16, 2007

Appl. No.:

11/839708

Inventors:

Jason D. Fuller - Simpsonville SC, US
Derrick W. Simons - Greer SC, US
Douglas E. Dean - Greer SC, US
Christopher T. Meadows - Simpsonville SC, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

F02C 9/00

US Classification:

60773, 60 39281, 60804

Abstract:

A method of managing transient events regularly seen during gas turbine operation that may cause undesirable operation and hardware damage. During certain transient operations, a lag may be seen between reference exhaust temperature and actual turbine exhaust temperature. This lag can result in an under-fired condition within the combustion system of variable magnitude and duration. Either fuel split schedules or a control algorithm can be positioned during these transients to prevent combustion dynamics or loss of flame. Combustion dynamics are known to cause damage that may require hardware replacement. Once the transient has completed, normal control operation is resumed.

US Patent:

20090063003, Mar 5, 2009

Filed:

Aug 28, 2007

Appl. No.:

11/845979

Inventors:

Christopher T. Meadows - Simpsonville SC, US
Douglas E. Dean - Greer SC, US
Jason D. Fuller - Simpsonville SC, US
William F. Seely - Taylors SC, US

International Classification:

F02C 9/00

US Classification:

701100, 415118

Abstract:

A method and controller for identifying lean blowout conditions in a Dry Low NO(DLN) combustor during a premix mode. An effective approach to quickly and reliably identify a blowout during operation in the premix mode is by the effect on fuel normalized power (FNP). FNP is a useful signal, in that a power reduction from a blowout may be distinguished much slower changes in power resulting from global fuel demand (changing load request). A difference between the FNP and a filtered FNP parameter may be compared against a predetermined threshold. If the difference exceeds the threshold, a lean blowout is identified and a signal may be transmitted to the turbine controller to reposition combustor operation away from blowout conditions.