Gas turbine apparatus

Abstract

A gas turbine apparatus is provided which prevents a sudden rise in temperature in the event of changing a speed such as upon start-up, thereby obviating a reduction in lifetime. The apparatus comprises a rotational speed control unit, acceleration control unit, low signal selector, and an opening operating unit. The rotational speed control unit receives a current rotational speed and a predetermined target rotational speed of a turbine, and processes them to output a control signal indicative of an opening degree of a fuel control valve to make the turbine rotate at the target rotational speed. The target rotational speed is set as a predetermined downwardly convex monotone increasing function having an elapsed time as a variable during a start-up period to rated condition. The acceleration control means receives a current process acceleration value and a predetermined target acceleration value, and processes them to output a control signal indicative of an opening of the fuel control valve to bring the acceleration of the turbine to the target acceleration. The low signal selector receives the control signals from the rotational speed and acceleration control means, and selects the control signal indicative of the smaller opening degree. The opening operating unit automatically operates the fuel control valve in response to the selected control signal.

Dependencies are inferred from the claim text.