Patent ID: 8074454
Filing Date: 2011-12-13
Classification: F01D,F05D,Y02E

Abstract:
1. A single-shaft combination power plant having a shaft axis, comprising: a shaft assembly arranged coaxially with the shaft axis and comprising a gas turbine section, a steam turbine section and a generator section; a gas turbine arranged coaxially with the shaft axis and including the gas turbine section of the shaft assembly; a steam turbine arranged coaxially with the shaft axis and including the steam turbine section of the shaft assembly; a generator arranged coaxially with the shaft axis and including the generator section of the shaft assembly and connected to the steam and gas turbine sections of the shaft assembly; a coupling arranged between the generator and the steam turbine sections of the shaft assembly; a drive device connected to the shaft assembly that drives the single shaft power plant; and a control unit connected to the drive device that controls a rotational speed of the steam turbine, wherein the control unit is configured to control the rotational speed of the steam turbine such that the steam turbine rotates at such a low rotational speed below 240 revolutions per hour that an undesired actuation of the coupling does not result in a rotation a rotor of the gas turbine.