Methods and systems for operating a gas turbine
AssigneeGeneral Electric Company
InventorsWilly Steve Ziminsky, Arthur James Fossum
Life of this patent
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Abstract
A method of operating a gas turbine is provided, wherein the gas turbine engine is coupled to an electrical grid operating at a standardized grid frequency value, and the gas turbine includes a combustor coupled in flow communication with a plurality of independent fuel circuits and a compressor. The method includes determining a deviation of a grid frequency from the standardized grid frequency value and adjusting fuel flow from a portion of the plurality of fuel circuits while maintaining a substantially constant air flow from the compressor to facilitate controlling a fuel to compressor discharge pressure ratio such that a combustor state does not lag changes in airflow when the combustor responds to the grid frequency deviation.
Claims20
A method of operating a gas turbine coupled to a remote electrical grid operating at a standardized grid frequency value, wherein the gas turbine includes a combustor coupled in flow communication with a plurality of independent fuel circuits and a compressor, said method comprising:
- determining a deviation of a grid frequency from the standardized grid frequency value, wherein the grid frequency is at least partially determined based on power consumption by the remote electrical grid;
- and
- adjusting fuel flow from a portion of the plurality of fuel circuits based on the determined grid frequency while maintaining a substantially constant air flow from the compressor to adjust a fuel to air ratio of a mixture supplied to the combustor and to facilitate controlling a fuel to compressor discharge pressure ratio such that a combustor state does not lag changes in airflow when the combustor responds to the grid frequency deviation.
A gas turbine coupled to a remote electrical grid operating at a standardized grid frequency value, said gas turbine comprising:
- a compressor;
- a plurality of independent fuel circuits;
- a combustor coupled in flow communication with said plurality of independent fuel circuits and said compressor;
- a sensor configured to determine a deviation of a grid frequency from the standardized grid frequency value, wherein the grid frequency is at least partially determined based on power consumption by the remote electrical grid;
- and
- a controller configured to adjust fuel flow in response to the grid frequency deviation, wherein fuel flow to a portion of said plurality of independent fuel circuits is adjusted while maintaining a substantially constant air flow from said compressor to adjust a fuel to air ratio of a mixture supplied to the combustor and to control a fuel to compressor discharge pressure ratio such that a combustor state does not lag changes in airflow when said combustor responds to the grid frequency deviation.
A system for generating power, said system comprising:
- a remote electrical grid operating at a standardized grid frequency value;
- and
- a gas turbine comprising:
- a compressor;
- a plurality of independent fuel circuits;
- a combustor coupled in flow communication with said plurality of independent fuel circuits and said compressor;
- a sensor configured to determine a deviation of a grid frequency from the standardized grid frequency value, wherein the grid frequency is at least partially determined based on power consumption by said remote electrical grid;
- and
- a controller configured to adjust fuel flow in response to the grid frequency deviation, wherein fuel flow to a portion of said plurality of independent fuel circuits is adjusted while maintaining a substantially constant air flow from said compressor to adjust a fuel to air ratio of a mixture supplied to the combustor and to control a fuel to compressor discharge pressure ratio such that a combustor state does not lag changes in airflow when said combustor responds to the grid frequency deviation.
Dependencies are inferred from the claim text.