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Combined cycle electric power plant with coordinated steam load distribution control

  • US 4,168,608 A
  • Filed: 04/02/1975
  • Issued: 09/25/1979
  • Est. Priority Date: 04/02/1975
  • Status: Expired due to Term
First Claim
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1. A control system for an electric combined cycle power plant having at least a gas turbine and a steam turbine and a heat recovery steam generator interconnected in a heat cycle to provide motive energy for driving said turbines, means for generating electric power in response to mechanical drive power from said turbines, said control system comprising a gas turbine control and a steam turbine control each being a portion of a digital control center and an analog control center, said digital and analog control centers providing means for a plurality of control modes at respective different levels of automation, the steam turbine control including means for providing at least two modes of control for automatically loading and unloading said steam turbine as a function of sensed steam pressure at a predetermined point in said steam turbine.

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