Combined cycle electric power plant and a gas turbine having an improved overspeed protection system
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 control 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 the 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 4327294
- OSTI ID:
- 5166669
- Country of Publication:
- United States
- Language:
- English
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Combined cycle electric power plant and a gas turbine having a backup control system with an improved feedforward analog speed/load control
Overspeed protection for a gas turbine/steam turbine combined cycle
Related Subjects
200100* -- Fossil-Fueled Power Plants-- Power Plants & Power Generation
200102 -- Fossil-Fueled Power Plants-- Power Cycles
COMBINED-CYCLE POWER PLANTS
CONTROL SYSTEMS
DIGITAL-TO-ANALOG CONVERTERS
ELECTRIC GENERATORS
ELECTRIC POWER
ELECTRONIC EQUIPMENT
EQUIPMENT
GAS TURBINES
MACHINERY
POWER
POWER PLANTS
STEAM TURBINES
THERMAL POWER PLANTS
TURBINES
TURBOMACHINERY