Methods and apparatus to optimize steam header blending and gas turbine loading in combined cycle power plants

A method to optimise ramp rates in combined cycle power plants comprises predicting a load setpoint for a gas turbine, and predicting a steam ramp setpoint for a steam generator associated with the gas turbine. A position of a bypass valve of the steam generator is determined based on the predicted...

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Bibliographische Detailangaben
Hauptverfasser:	Jacob Nathanial Adams, Ranjit R Rao, Frederick C. Huff, Xu Cheng
Format:	Patent
Sprache:	eng
Schlagworte:	AIR INTAKES FOR JET-PROPULSION PLANTS BLASTING COMBUSTION ENGINES CONTROL OR REGULATING SYSTEMS IN GENERAL CONTROLLING CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS ENGINE PLANTS IN GENERAL ENGINE PLANTS NOT OTHERWISE PROVIDED FOR ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES FUNCTIONAL ELEMENTS OF SUCH SYSTEMS GAS-TURBINE PLANTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS PHYSICS REGULATING STEAM ACCUMULATORS STEAM ENGINE PLANTS STEAM ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	A method to optimise ramp rates in combined cycle power plants comprises predicting a load setpoint for a gas turbine, and predicting a steam ramp setpoint for a steam generator associated with the gas turbine. A position of a bypass valve of the steam generator is determined based on the predicted setpoints. A weighting factor associated with either or both of the setpoints is adjusted based on the determined bypass valve position, in order to decrease an amount of steam flowing through the valve. This allows the combined cycle power plant overall to be operated more efficiently with less steam wastage.