Cooldown control system for a combined cycle electrical power generation plant

Patent · Tue Jan 27 04:00:00 EST 1987

OSTI ID:6879402

Martens, A; Snow, B E

This patent describes 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. The steam generator and gas turbine both produce electrical power under load, and the gas turbine has a control circuit determining the operation therof. A cooldown control system is described for the power generation plant. The system comprises: first means for detecting one of a steaming condition and a non-steaming condition in the heat recovery steam generator; second means responsive to the steaming condition and to a gas turbine STOP signal for reducing the load of the gas turbine toward a minimum load level; third means responsive to the non-steaming condition and to the minimum load level being reached for generating a STOP command and applying the STOP command to the control circuit of the gas turbine, thereby to indicate a sequence of steps to stop the gas turbine.

• Assignee: Westinghouse Electric Corp., Pittsburgh, PA
• Patent Number(s): US 4638630
• OSTI ID: 6879402
• Country of Publication: United States
• Language: English

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20 FOSSIL-FUELED POWER PLANTS
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BOILERS
COMBINED-CYCLE POWER PLANTS
COMPUTERIZED CONTROL SYSTEMS
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ELECTRONIC CIRCUITS
ENERGY RECOVERY
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EQUIPMENT
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TURBINES
TURBOMACHINERY
VAPOR GENERATORS