Overspeed protection for a gas turbine/steam turbine combined cycle

Patent · Tue Dec 03 04:00:00 EST 1991

OSTI ID:5589812

Moore, J H

This paper describes an improved combined cycle power plant and overspeed protection system of the type having a reheat steam turbine. It comprises: a high pressure steam turbine section with at least one control valve, and a lower pressure steam turbine section; a gas turbine including a turbine section, a combustor, a fuel valve supplying the combustor, and an air compressor with a discharge end leading to the combustor; a load riven by the reheat steam turbine and the gas turbine; the reheat steam turbine, the gas turbine and the load all having rotating members; a heat recovery steam generator heated by the gas turbine, including a high pressure steam generating section supplying steam to the high pressure steam turbine section through the control valve, and a steam reheater section receiving steam exhausted from the high pressure steam turbine section. The improvement comprises: a valveless steam conduit connected between the outlet of the steam reheater section and the inlet of the lower pressure steam turbine section, and solid couplings serving to solidify couple the rotating members together as a single rotor, the rotor having a single thrust bearing.

• Assignee: General Electric Co., Schenectady, NY (United States)
• Patent Number(s): A; US 5069030
• Application Number: PPN: US 7-590939
• OSTI ID: 5589812
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200102* -- Fossil-Fueled Power Plants-- Power Cycles
42 ENGINEERING
425000 -- Engineering-- Power Cycles-- (1980-)
COMBINED-CYCLE POWER PLANTS
CONTROL EQUIPMENT
CONTROL SYSTEMS
EQUIPMENT
EQUIPMENT PROTECTION DEVICES
FLOW REGULATORS
GAS TURBINES
HIGH PRESSURE
MACHINERY
POWER PLANTS
STEAM TURBINES
THERMAL POWER PLANTS
TURBINES
TURBOMACHINERY
VALVES