Methods and apparatus to optimize steam turbine ramp rates

A method and apparatus to optimize turbine ramp rates comprises predicting a setpoint for a turbine rotor over a prediction horizon, and predicting a surface temperature profile of the turbine rotor for the prediction horizon based on the predicted setpoint via an empirical data model, and predictin...

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Bibliographische Detailangaben
Hauptverfasser:	Ranjit R Rao, Frederick Charles Huff, Melanie Jean Novacek, Xu Cheng
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING ENGINE PLANTS IN GENERAL HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES STEAM ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	A method and apparatus to optimize turbine ramp rates comprises predicting a setpoint for a turbine rotor over a prediction horizon, and predicting a surface temperature profile of the turbine rotor for the prediction horizon based on the predicted setpoint via an empirical data model, and predicting a first stress profile for the turbine rotor based on the surface temperature profile. The first stress profile is compared with a second (allowable) stress profile, and the setpoint is dynamically adjusted based on the comparison. This allows ramp rate to be optimised while limiting thermal stress on the turbine rotor.