초록 ▼

A combined cycle power plant comprises a gas turbine system and a steam cycle system having a steam turbine to be driven by the steam generated by the waste heat of the exhaust gas of the gas turbine system, wherein the steam from the steam cycle system flows through a gas turbine cooling system of

A combined cycle power plant comprises a gas turbine system and a steam cycle system having a steam turbine to be driven by the steam generated by the waste heat of the exhaust gas of the gas turbine system, wherein the steam from the steam cycle system flows through a gas turbine cooling system of the gas turbine to cool the gas turbine blades and other elements of the gas turbine system to be cooled and the waste heat of the gas turbine system is effectively collected. The gas turbine cooling system is supplied selectively with bleed air from the compressor of the gas turbine or the steam provided from another steam cycle system in order to ensure a sufficient coolant supply at the time of starting and stopping the plant and during the operation with a partial load.

대표청구항 ▼

[ What is claimed is:] [1.] A combined cycle power plant comprising:a gas turbine system having a gas turbine and a compressor;a waste heat collector boiler configured to collect waste heat of an exhaust of the gas turbine;a steam cycle system having a steam turbine configured to be driven by steam

[ What is claimed is:] [1.] A combined cycle power plant comprising:a gas turbine system having a gas turbine and a compressor;a waste heat collector boiler configured to collect waste heat of an exhaust of the gas turbine;a steam cycle system having a steam turbine configured to be driven by steam generated by the waste heat collector boiler;a gas turbine cooling system configured to feed part or all of steam and/or water generated in said steam cycle system into said gas turbine system and return the steam and/or water into said steam cycle system; anda switching section configured to selectively supply to said gas turbine said steam and/or water coming from said steam cycle system or high pressure air coming from said compressor, said switching section further comprises a first flow rate controller configured to control a flow rate of said steam and/or water and a second flow rate controller configured to control a flow rate of said high pressure air.