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Power and speed control device for a turbo-generator set

  • US 4,292,534 A
  • Filed: 01/17/1980
  • Issued: 09/29/1981
  • Est. Priority Date: 01/26/1979
  • Status: Expired due to Term
First Claim
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1. Power and speed control device for a turbo-generator set having a generator, a turbine, and a governing valve with a positioning control input, for regulating steam fed to the turbine, comprising a turbine speed controller and a turbine power controller each having an output;

  • a maximum selection circuit, a minimum selection circuit and a summing stage each having a first and a second input and an output, and means for supplying a constant reference value to said first input of said summing stage, each of said outputs of said controllers being connected, respectively, to an input of said maximum selection circuit for switching between speed and power control, said output of said speed controller being additionally connected to said second input of said summing stage, said output of said summing stage being connected to said first input of said minimum selection circuit, said output of said maximum selection circuit being connected to said second input of said minimum selection circuit, and said output of said minimum selection circuit being fed to the positioning control input of the governing valve.

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