Heat recovery steam generator outlet temperature control system for a combined cycle power plant

Patent · Tue Apr 01 04:00:00 EST 1986

OSTI ID:5827501

Martens, A; Myers, G A; McCarty, W L; Wescott, K R

This patent describes a command cycle electrical power plant including: a steam turbine and at least one set comprising a gas turbine, an afterburner and a heat recovery steam generator having an attemperator for supplying from an outlet thereof to the steam turbine superheated steam under steam turbine operating conditions requiring predetermined superheated steam temperature, flow and pressure; with the gas turbine and steam turbine each generating megawatts in accordance with a plant load demand; master control means being provided for controlling the steam turbine and the heat recovery steam generator so as to establish the steam operating conditions; the combination of: first control means responsive to the gas inlet temperature of the heat recovery steam generator and to the plant load demand for controlling the firing of the afterburner; second control means responsive to the superheated steam predetermined temperature and to superheated steam temperature from the outlet for controlling the attemperator between a closed and an open position; the first and second control means being operated concurrently to maintain the superheated steam outlet temperature while controlling the load of the gas turbine independently of the steam turbine operating conditions.

• Assignee: Westinghouse Electric Corp., Pittsburgh, PA
• Patent Number(s): US 4578944
• OSTI ID: 5827501
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200104 -- Fossil-Fueled Power Plants-- Components
200105* -- Fossil-Fueled Power Plants-- Heat Utilization
AFTERBURNERS
BOILERS
COMBINED-CYCLE POWER PLANTS
COMBUSTION CONTROL
CONTROL
CONTROL SYSTEMS
ENERGY RECOVERY
EQUIPMENT
FLOW RATE
GAS TURBINES
HEAT RECOVERY
HEAT RECOVERY EQUIPMENT
HEATING
MACHINERY
POLLUTION CONTROL EQUIPMENT
POWER PLANTS
PRESSURE DEPENDENCE
RECOVERY
STEAM GENERATORS
STEAM TURBINES
SUPERHEATING
TEMPERATURE CONTROL
TEMPERATURE EFFECTS
THERMAL POWER PLANTS
TURBINES
TURBOMACHINERY
VAPOR GENERATORS