Load rejection for gas turbine

摘要

A gas turbine system includes a compressor, a fuel source, a combustor, and a turbine. The compressor is configured to compress air. The fuel source is configured to supply fuel to a plurality of fuel manifolds. The combustor is configured to receive the air from the compressor, to receive the fuel from the plurality of fuel manifolds, and to combust the air and the fuel into combustion products. The turbine is configured to extract work from the combustion products. A fuel control valve is disposed within each of the plurality of fuel manifolds and is configured to throttle the fuel to the combustor when the gas turbine system is operating in an electrical island mode.

主权项

1. A gas turbine system, comprising:
a compressor configured to compress air; a fuel source configured to supply fuel to a plurality of fuel manifolds; a combustor configured to receive the air from the compressor, to receive the fuel from the plurality of fuel manifolds, and to combust the air and the fuel into combustion products; a turbine configured to extract work from the combustion products; a plurality of fuel control valves, each corresponding to a respective one of the plurality of fuel manifolds and configured to throttle the fuel to the combustor when the gas turbine system is operating in an electrical island mode; and a controller comprising a processor and an article of manufacture that includes one or more tangible, machine-readable media at least collectively comprising instructions executable by the processor, the instructions comprising instructions to:
receive a signal to initiate load rejection by the gas turbine system;detect an ambient condition of the gas turbine system and a power demand of a local load supplied at least partially by the gas turbine system;select a fuel schedule of a plurality of fuel schedules based on the signal;select a fuel distribution operating mode of a plurality of stored fuel distribution operating modes of the selected fuel schedule based on the ambient condition and the power demand, wherein each of the plurality of fuel distribution operating modes comprises a unique fuel distribution for the plurality of fuel manifolds; andthrottle the fuel to the plurality of fuel control valves according to the selected fuel distribution operating mode.