Combined cycle electric power plant and a gas turbine having an improved overspeed protection system

Patent · Tue Sep 11 04:00:00 EDT 1979

OSTI ID:5696270

Smith, J R; Reed, T J

A combined cycle electric power plant includes gas and steam turbines and steam generators and a digital-/analog control system. In the automatic and manual modes of operation, the control system develops a fuel reference signal for the throttle valve position control by means of a speed/load control which functions on a feedforward speed control basis without speed feedback correction. An electrical overspeed protection control is directly coupled to the throttle valve position contol to limit turbine speed to a first reference value when the breaker is closed and to limit turbine speed to a lower reference value when th breaker is open. Electrical and mechanical overspeed protection systems directly trip the turbine at higher speed references.

• Assignee: Westinghouse Electric Corp.
• Patent Number(s): US 4167096
• OSTI ID: 5696270
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200102* -- Fossil-Fueled Power Plants-- Power Cycles
BOILERS
COMBINED-CYCLE POWER PLANTS
CONTROL EQUIPMENT
CONTROL SYSTEMS
DESIGN
DIGITAL-TO-ANALOG CONVERTERS
ELECTRONIC EQUIPMENT
EQUIPMENT
EQUIPMENT PROTECTION DEVICES
FLOW REGULATORS
GAS TURBINES
MACHINERY
POWER PLANTS
SPEED REGULATORS
STEAM GENERATORS
STEAM TURBINES
THERMAL POWER PLANTS
TURBINES
TURBOMACHINERY
VALVES
VAPOR GENERATORS