초록

In a combined cycle electrical power generator plant, the shut-down process includes a cooldown control period which is minimized before shutting down the gas turbine by detecting first whether a non-steaming condition has been reached and whether the gas turbine has been reduced to minimum load.

대표청구항 ▼

In a combined cycle electrical power plant including a steam turbine, a heat recovery steam generator for supplying steam to the steam turbine, a gas turbine for supplying heat to the heat recovery steam generator, said steam generator and gas turbine each producing electrical power under load, the

In a combined cycle electrical power plant including a steam turbine, a heat recovery steam generator for supplying steam to the steam turbine, a gas turbine for supplying heat to the heat recovery steam generator, said steam generator and gas turbine each producing electrical power under load, the gas turbine having a control circuit determining the operation thereof; the combination of: first means for detecting one of a steaming condition and a non-steaming condition in said heat recovery steam generator; second means responsive to said steaming condition and to a gas turbine STOP signal for reducing the load of said gas turbine toward a minimum load level; third means responsive to said non-steaming condition and to said minimum load level being reached for generating a STOP command and applying said STOP command to the control circuit of said gas turbine, thereby to indicate a sequence of steps to stop the gas turbine.