CONTROL OF ROTOR STRESS WITHIN TURBOMACHINE DURING STARTUP OPERATION

Embodiments of the disclosure provide methods for controlling a turbine during startup. The method includes calculating a predicted stress on a rotor (26) of the turbine component (48), and determining whether the predicted stress exceeds a threshold. If the predicted stress exceeds the threshold, t...

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Bibliographische Detailangaben
Hauptverfasser:	NAGEL, Bruce Frederick, FRAZER, Austin Daniel, BAKER, Dean Alexander, TOTH, Carl Raymond, DI PALMA, Steven
Format:	Patent
Sprache:	eng ; fre ; ger
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:	Embodiments of the disclosure provide methods for controlling a turbine during startup. The method includes calculating a predicted stress on a rotor (26) of the turbine component (48), and determining whether the predicted stress exceeds a threshold. If the predicted stress exceeds the threshold, the inlet valve (104) adjusts to a warming position that is less open than the minimum load position. When steam in the discharge passage (112) reaches a target pressure, the exhaust valve (110) is partially closed. If a safety parameter of the turbine component (48) violates a boundary, while maintaining the warming position of the inlet valve (104), the exhaust valve (110) partially opens with the warming position of the inlet valve (104) being maintained. The predicted stress on the rotor (26) is recalculated with the inlet valve (104) in the warming position. If the predicted stress does not exceed the threshold, the inlet valve (104) opens to at least the minimum load position.