Adaptive temperature control system for the supply of steam to a steam turbine
A combined-cycle steam turbine power generating plant is described including a heat recovery steam generator for outputting steam at an instantaneous temperature and pressure, and a steam turbine having rotor expanding steam therethrough from the steam generator; means providing a signal representative of the temperature of the rotor of the turbine; and means for controlling the generation of steam by the steam generator to control the temperature of steam in accordance with a predetermined temperature gradient, the combination of: function generator means responsive to a signal representative of steam turbine throttle pressure for providing a throttle pressure related steam limit temperature according to a constant enthalpy characteristic; bias means responsive to the rotor temperature representative signal for providing a bias signal in excess of the rotor temperature signal by a predetermined amount; means responsive to the larger of the limit temperature signal and the bias signal for controlling the generation of steam by the steam generator to control the temperature of steam to iteratively raise the temperature of the rotor in accordance with the constant enthalpy characteristic and the bias signal during soaking.
- Assignee:
- Westinghouse Electric Corp., Pittsburgh, PA
- Patent Number(s):
- US 4589255
- OSTI ID:
- 5580203
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
200102 -- Fossil-Fueled Power Plants-- Power Cycles
200104 -- Fossil-Fueled Power Plants-- Components
200105* -- Fossil-Fueled Power Plants-- Heat Utilization
BOILERS
COMBINED-CYCLE POWER PLANTS
CONTROL
CONTROL SYSTEMS
ENERGY RECOVERY
ENTHALPY
HEAT RECOVERY
MACHINERY
PHYSICAL PROPERTIES
POWER PLANTS
PRESSURE CONTROL
RECOVERY
ROTORS
SIGNALS
STEAM GENERATION
STEAM GENERATORS
STEAM TURBINES
TEMPERATURE CONTROL
TEMPERATURE GRADIENTS
THERMAL POWER PLANTS
THERMODYNAMIC PROPERTIES
TURBINES
TURBOMACHINERY
VAPOR GENERATORS
WASTE HEAT UTILIZATION
WASTE PRODUCT UTILIZATION