Correction system and method for gas turbine proportional droop governor
OwnerYuhui Chen, Bryan Edward Sweet +1inventors
InventorsYuhui Chen, Bryan Edward Sweet, Scott William Szepek
Life of this patent
Estimating the term…
Abstract
A method, including receiving a turbine system operating parameter. The turbine system operating parameter includes an indication of a frequency variation of an electric power system associated with the turbine system. The method includes determining a correction factor to vary the output of the turbine system according to the frequency variation, wherein the correction factor is based on a droop power response and a nominal droop power ratio. The droop power response is calculated based on a gas turbine power output and a speed-load error. The method further includes varying the output of the turbine system based at least in part on the correction factor.
Claims18
A system, comprising:
- a droop response system configured to detect one or more operational characteristics of a turbine system as an indication of a frequency variation of an electric power system associated with the turbine system, wherein the droop response system is further configured to generate a nominal fuel flow command that adjusts fuel flow of the turbine system to control the droop response in proportion to the frequency variation;
- and
- a proportional droop correction control system configured to:
- determine a correction factor based on a droop power response and a nominal droop power ratio, wherein the droop power response is calculated based on a gas turbine power output and a speed-load error;
- and
- generate the correction factor to apply to the nominal fuel flow command generated by the droop response system, wherein the correction factor is configured to correct the nominal fuel flow command generated by the droop response system;
- wherein the droop response system is configured to determine an actual fuel flow command based at least in part on the correction factor applied to the nominal fuel flow command and to output an actual fuel flow command to control operation of the turbine.
A method, comprising:
- receiving a turbine system operating parameter, wherein the turbine system operating parameter comprises an indication of a frequency variation of an electric power system associated with the turbine system;
- determining a nominal fuel flow command based on a corresponding magnitude of the frequency variation, wherein the nominal fuel flow command controls operation of the turbine system in proportion to the frequency variation;
- determining a correction factor to vary the output of the turbine system according to the frequency variation, wherein the correction factor is based on a droop power response and a nominal droop power ratio, wherein the droop power response is calculated based on a gas turbine power output and a speed-load error;
- determining an actual fuel flow command based at least in part on the correction factor applied to the nominal fuel flow command;
- and
- varying the output of the turbine system based at least in part on the actual fuel flow command.
A non-transitory computer-readable medium having computer executable code stored thereon, the code comprising instructions to:
- receive a turbine system operating parameter, wherein the turbine system operating parameter comprises an indication of a frequency variation of an electric power system associated with the turbine system;
- generate a droop correction factor to apply to a response generated to vary the output of the turbine system according to the frequency variation, wherein the droop correction factor is based on a nominal droop power ratio and a droop power response, wherein the nominal droop power ratio comprises a rated gas turbine output divided by a preset droop level, and wherein the droop power response comprises a gas turbine power output divided by a speed-load error;
- and
- vary the output of the turbine system according to the droop correction factor applied to the response.
Dependencies are inferred from the claim text.