Title: Combined cycle electric power plant and a gas turbine having an improved startup control especially useful in a backup control system

Abstract: A combined cycle electric power plant includes gas and steam turbines and steam generators and a digital/analog control system. The control system includes an automatic control and a backup control which are interfaced to operate the gas turbine throttle valve for speed and load control purposes and to provide for manual/auto transfers. The backup control includes a startup control which functions on the basis of a feedforward fuel schedule ramp function. Between ignition speed and 78% synchronous speed, the ramp function is a linear function of fuel demand versus speed with a predetermined slope. From 78% of synchronous speed to idle speed, the ramp function is a linear function with a lesser slope.

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Inventors: Smith, Jack R. (Pittsburgh, PA, US)
Reed, Terry J. (North Huntingdon, PA, US)

Application Number: 495700
Filing Date: 1974-08-08
Publication_date: 1976-03-09
Assignee: Westinghouse Electric Corporation (Pittsburgh, PA)
Primary Class(es): 290/40R 60/39.182, 60/39.281
Other Classes:
US Patent Ref:

3762162	Oct, 1973	Miura et al.	60/49.
3820323	Jun, 1974	Burnell et al.	60/39.
3866109	Feb, 1975	Reed et al.	322/15.

Other Refs:
Primary Examiner: Scott, James R.
Assistant Examiner: Redman, John W.
Attorney: Possessky; E. F.