Method for starting a gas turbine plant with an air accumulator

A method for starting up a gas turbine system by means of compressed air delivered from an air-storage chamber and wherein the turbine system is comprised of high and low pressure turbines operating on a common shaft, there being high and low pressure combustion chambers respectively preceding the high and low pressure turbines, and an electrical generator connectible to the turbine shaft through coupling means which serves as the load for the turbine system. The method involves feeding compressed air from the storage chamber through the turbines to accelerate them to normal operating speed, igniting the high-pressure combustion chamber during acceleration of the turbines but with a low fuel input, then coupling the generator to the turbine shaft, then igniting the low-pressure combustion chamber, then increasing the pressure at the high-pressure combustion chamber to the full operating pressure to increase the air flow to an amount greater than that normally maintained during the operating period of the turbine system, then increasing the admission temperature of the air to the low-pressure turbine until the full output of the turbine has been reached, and simultaneously increasing the admission temperature of the air to the high-pressure turbine until its full operating temperature has been reached.