Optimal set-point scheduling in a boiler-turbine system
Conference
·
OSTI ID:5113565
A 32nd order boiler-turbine model is developed to solve the optimal set-point scheduling problem for main and hot reheat steam conditions in a 235 MW gas fired electric generating plant. The model has 7 states in the process and 25 in the control system. The optimization strategy uses control vector parameterization in which the boiler controller set-point function generators are modified to produce suboptimum signals. The performance index consists of the total energy input to the system from the fuel and boiler feedpump. Constraints in the process variables are monitored by critical alarm limits, and hoop stresses in the heat exchanger tubes are estimated as well. The optimization problem is solved for steady state and dynamic conditions in the 75 to 235 MW load range. Savings in fuel between 0.7 to 4.0% are predicted by computer simulations in the normal operating load range of the unit. Preliminary plant tests indicate these estimated savings may be realistic. The boiler-turbine model and optimization strategy illustrate the potential use of mathematical models for power plants.
- Research Organization:
- Dept. of Engineering Science, Trinity Univ., San Antonio, TX 78284
- OSTI ID:
- 5113565
- Report Number(s):
- CONF-860705-
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
20 FOSSIL-FUELED POWER PLANTS
200105* -- Fossil-Fueled Power Plants-- Heat Utilization
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
ACCOUNTING
BOILERS
COMPUTERIZED CONTROL SYSTEMS
COMPUTERIZED SIMULATION
CONTROL SYSTEMS
DUAL-PURPOSE POWER PLANTS
ENERGY ACCOUNTING
ENERGY ANALYSIS
ENERGY MANAGEMENT
GAS TURBINES
HEAT EXCHANGERS
MACHINERY
MANAGEMENT
MONITORING
OPERATION
OPTIMIZATION
PERFORMANCE
POWER INPUT
POWER PLANTS
POWER RANGE 10-100 MW
POWER RANGE 100-1000 MW
PUMPS
SCHEDULES
SIGNALS
SIMULATION
STEAM GENERATION
STRESSES
THERMAL STRESSES
TURBINES
TURBOMACHINERY
200105* -- Fossil-Fueled Power Plants-- Heat Utilization
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
ACCOUNTING
BOILERS
COMPUTERIZED CONTROL SYSTEMS
COMPUTERIZED SIMULATION
CONTROL SYSTEMS
DUAL-PURPOSE POWER PLANTS
ENERGY ACCOUNTING
ENERGY ANALYSIS
ENERGY MANAGEMENT
GAS TURBINES
HEAT EXCHANGERS
MACHINERY
MANAGEMENT
MONITORING
OPERATION
OPTIMIZATION
PERFORMANCE
POWER INPUT
POWER PLANTS
POWER RANGE 10-100 MW
POWER RANGE 100-1000 MW
PUMPS
SCHEDULES
SIGNALS
SIMULATION
STEAM GENERATION
STRESSES
THERMAL STRESSES
TURBINES
TURBOMACHINERY