Patent ID: 8833085
Filing Date: 2014-09-16
Classification: F02C,F05D

Abstract:
1. A method for starting a gas turbine, comprising: selecting a nominal acceleration trajectory curve from a startup acceleration trajectory schedule which defines the nominal acceleration trajectory curve and a plurality of acceleration trajectory curves which deviate from the nominal acceleration trajectory curve for achieving a desired operating speed of the gas turbine at a predefined target time, wherein the acceleration trajectory curves from the startup acceleration trajectory schedule range from speed zero to a target speed; applying a startup torque to the gas turbine; determining a current speed of the gas turbine, wherein the current speed is taken at a time which occurs prior to the target startup time; determining time remaining until the target startup time is to be achieved based on the time at which the current speed was determined; comparing the current speed and time remaining with the nominal acceleration trajectory curve; and wherein if the current speed and time remaining deviate from the nominal acceleration trajectory curve the method further comprises modifying at least one effector of the gas turbine which results in the gas turbine following one of the acceleration trajectory curves which deviate from the nominal acceleration trajectory curve to achieve the desired operating speed at the predefined target time.