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Multiple turbine electric power plant having a coordinated control system with improved flexibility

  • US 4,222,229 A
  • Filed: 10/18/1978
  • Issued: 09/16/1980
  • Est. Priority Date: 10/18/1978
  • Status: Expired due to Term
First Claim
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1. A combined cycle electric power plant comprising at least one gas turbine and a steam turbine, a heat recovery steam generator connected to deliver steam to said steam turbine, an afterburner connected to deliver heat to said steam generator and connected to receive exhaust gas from said at least one gas turbine and adapted to impart further heat to said exhaust gas, a control system comprising at least an analog portion for operating said plant, said control system having (i) means for controlling the load operation of said steam turbine, (ii) means for controlling the load operation of said at least one gas turbine, and (iii) means for controlling the operation of said afterburner, said control system having coordinating logic means including control mode means for establishing a plurality of mode levels for carrying out respective ones of said load operations at respective different levels of automatic control, and control mode selection means for operatively selecting which of said mode level operations are carried out by said control system on which respective ones of said turbines.

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