Power plants – Motive fluid energized by externally applied heat – Having condition responsive control
Patent
1988-09-28
1989-11-07
Husar, Stephen F.
Power plants
Motive fluid energized by externally applied heat
Having condition responsive control
60646, F01K 1302
Patent
active
048783480
ABSTRACT:
A method and apparatus for continually monitoring the operating state of a set of governor valves (42,60) in a steam supply system for the first stage of a high pressure turbine during operation of the turbine, the system including a source including a throttle valve (40) for supplying steam at a defined pressure to the governor valves (42,60) and a plurality of nozzles (44) each connected to deliver steam from a respective governor valve (42,60) to a respective turbine inlet region, by the steps of: monitoring (52) the pressure at the outlet of each governor valve (42,60); monitoring (50,54) the pressure at the inlet to the throttle valve(s) (40) and at the turbine first stage; and comparing (56) the monitored outlet pressure of each governor valve (42,60) with the monitored pressure at the throttle valve inlet and at the turbine first stage in order to provide an indication of the operating state of each governor valve (42,60) and to detect and alert power plant operators of valve malfunctions or inefficient operation.
REFERENCES:
patent: 3934419 (1976-01-01), Aanstad
patent: 4461152 (1984-07-01), Tennichi et al.
"Turbine Control Valve Alignment and Position Monitoring Procedures", by S. E. Williams, EPRI Power Plant Performance Monitoring and System Dispatch Improvement Workshop, Nov. 12-14, 1986.
Bach K.
Husar Stephen F.
Westinghouse Electric Corp.
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