Abstract: Systems, program products, and methods for detecting thermal stability within gas turbine systems are disclosed. The systems may include a computing device(s) in communication with a gas turbine system, and a plurality of sensors positioned within or adjacent the gas turbine system. The sensor(s) may measure operational characteristics of the gas turbine system. The computing device(s) may be configured to detect thermal stability within the gas turbine system by performing processes including calculating a lag output for each of the plurality of measured operational characteristics. The calculated lag output may be based on a difference between a calculated lag for the measured operational characteristics and the measured operational characteristic itself. The calculated lag output may be also be based on a time constant for the measured operational characteristics. The computing device(s) may also determine when each of the calculated lag outputs are below a predetermined threshold.

Abstract: Systems, program products, and methods for detecting thermal stability within gas turbine systems are disclosed. The systems may include a computing device(s) in communication with a gas turbine system, and a plurality of sensors positioned within or adjacent the gas turbine system. The sensor(s) may measure operational characteristics of the gas turbine system. The computing device(s) may be configured to detect thermal stability within the gas turbine system by performing processes including calculating a lag output for each of the plurality of measured operational characteristics. The calculated lag output may be based on a difference between a calculated lag for the measured operational characteristics and the measured operational characteristic itself. The calculated lag output may be also be based on a time constant for the measured operational characteristics. The computing device(s) may also determine when each of the calculated lag outputs are below a predetermined threshold.

Abstract: Various embodiments include a system having: a computing device configured to control a power plant system including a steam turbine (ST), a gas turbine (GT), and a heat recovery steam generator (HRSG) fluidly connected with the ST and the GT, by performing actions including: obtaining data representing a target steam specific enthalpy in a bowl section of the ST; determining a current steam pressure at an outlet of the HRSG and a current steam temperature at the outlet of the HRSG; calculating an actual steam specific enthalpy in the bowl section of the ST based upon the current steam pressure at the outlet of the HRSG and the current steam temperature at the outlet the HRSG; and modifying a temperature of steam entering the ST in response to determining that the calculated actual steam specific enthalpy in the bowl section differs from the target steam specific enthalpy in the bowl section by a threshold.

Abstract: A method for operating a steam generation facility includes inducing a motive force on water by channeling steam into at least one eductor to form a steam-driven cooling fluid stream. The method also includes channeling the steam-driven cooling fluid stream to at least one attemperator. The method further includes channeling steam from at least one steam source to the at least one attemperator. The method also includes injecting the steam-driven cooling fluid stream into the steam channeled through the at least one attemperator to facilitate cooling the steam channeled from the at least one steam source.

Abstract: Attemperation systems and methods for cooling steam bypassed from a steam turbine during tripping of the steam turbine are provided in the disclosed embodiments. The systems may be configured to deliver water discharged from a fuel gas heater to a bypass attemperator, where the water discharged from the fuel gas heater may be used to cool the bypass steam. Before being used by the fuel gas heater, the water used to heat the fuel gas may be heated by an economizer. The water may be delivered to the economizer by an intermediate pressure stage of a boiler feedwater pump. In the disclosed embodiments, the intermediate pressure stage of the boiler feedwater pump may also be used to supply water to a re-heater attemperator, which may be used to further cool the steam after it has been delivered from the bypass attemperator to a re-heater. In addition, the intermediate pressure stage of the boiler feedwater pump may deliver water directly to the bypass attemperator as a supplemental water source.

Abstract: Attemperation systems and methods for cooling steam bypassed from a steam turbine during tripping of the steam turbine are provided in the disclosed embodiments. The systems may be configured to deliver water discharged from a fuel gas heater to a bypass attemperator, where the water discharged from the fuel gas heater may be used to cool the bypass steam. Before being used by the fuel gas heater, the water used to heat the fuel gas may be heated by an economizer. The water may be delivered to the economizer by an intermediate pressure stage of a boiler feedwater pump. In the disclosed embodiments, the intermediate pressure stage of the boiler feedwater pump may also be used to supply water to a re-heater attemperator, which may be used to further cool the steam after it has been delivered from the bypass attemperator to a re-heater. In addition, the intermediate pressure stage of the boiler feedwater pump may deliver water directly to the bypass attemperator as a supplemental water source.