Startup method for large steam turbines

摘要

A method of controlling a steam turbine receiving steam from a steam generator and having a rotor linked to a power generator and a steam turbine controller controlling at least the position of a steam inlet valve located in a steam conduit between the steam generator and the steam turbine to control the mass flow into the steam turbine is described including the steps of before beginning of the startup selecting a predefined set of startup sequences of setpoints based on a status of the steam turbine at the beginning of the startup and/or a startup mode chosen by the operator wherein the set of startup sequences of setpoints includes parameters not (directly) controlled by the steam turbine controller and parameters (directly) controlled by the steam turbine controller; using the steam turbine controller to control the parameters controlled by the steam turbine controller so as to progress the steam turbine from setpoint to setpoint in accordance with the predefined set of startup sequences until reaching a release point; and at the release point delaying the move to the next setpoint until actual setpoint values agree with the predefined setpoint values at the release point for the parameters not (directly) controlled by the steam turbine controller.