Combined cycle electric power plant with a steam turbine having a sliding pressure main bypass and control valve system
Patent
·
OSTI ID:5404596
A combined cycle electric power plant includes two gas turbines, a steam turbine, and a digital control system with an operator analog or manual backup. Each of the gas turbines has an exhaust heat recovery steam generator connected to a common header from which the steam is supplied by one or both of the steam generators for operating the steam turbine. The control system is of the sliding pressure type and maintains a predetermined steam pressure as a function of steam flow according to a predetermined characterization depending on the number of steam generators in service to limit the maximum steam velocity through the steam generators, and reduce the probability of water carryover into the steam turbine. Such control is always maintained by the bypass valve. The turbine control valve responds to the speed/load demand only, except when the bypass valve is closed and the rate of steam generation is insufficient to maintain a predetermined pressure flow relationship.
- Assignee:
- Westinghouse Electric Corp
- Patent Number(s):
- US 4201924
- OSTI ID:
- 5404596
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
20 FOSSIL-FUELED POWER PLANTS
200102* -- Fossil-Fueled Power Plants-- Power Cycles
200105 -- Fossil-Fueled Power Plants-- Heat Utilization
BOILERS
COMBINED-CYCLE POWER PLANTS
CONTROL
CONTROL EQUIPMENT
CONTROL SYSTEMS
ENERGY
ENERGY RECOVERY
EQUIPMENT
FLOW REGULATORS
GAS TURBINES
HEAT
HEAT RECOVERY
MACHINERY
POWER PLANTS
PRESSURE CONTROL
RECOVERY
STEAM GENERATORS
STEAM TURBINES
THERMAL POWER PLANTS
TURBINES
TURBOMACHINERY
VALVES
VAPOR GENERATORS
WASTE HEAT
WASTES
200102* -- Fossil-Fueled Power Plants-- Power Cycles
200105 -- Fossil-Fueled Power Plants-- Heat Utilization
BOILERS
COMBINED-CYCLE POWER PLANTS
CONTROL
CONTROL EQUIPMENT
CONTROL SYSTEMS
ENERGY
ENERGY RECOVERY
EQUIPMENT
FLOW REGULATORS
GAS TURBINES
HEAT
HEAT RECOVERY
MACHINERY
POWER PLANTS
PRESSURE CONTROL
RECOVERY
STEAM GENERATORS
STEAM TURBINES
THERMAL POWER PLANTS
TURBINES
TURBOMACHINERY
VALVES
VAPOR GENERATORS
WASTE HEAT
WASTES