Governor Model: UHRSG

 

Following checks and corrections are applied during Validation and AutoCorrection.

  • For the parameters Td and Tv, the following check is done
    If 0.0 < Param < 0.5*Mult*TimeStep then Param = 0
    ElseIf 0.5*Mult*TimeStep < Param < Mult*TimeStep then Param = Mult*TimeStep
  • For the parameters Tdrum, the following check is done
    If Param < Mult*TimeStep then Param = Mult*TimeStep

Mult represents the user-specified value Minimum time constant size as multiple of time step option on the Validation page of the Transient Stability Dialog

TimeStep represents the integration time step being used as described on TimeStep

Model Equations and/or Block Diagrams

Parameters:

Pgt1 Power Point #1 for Heat versus gas turbine power function
Qgt1 Heat at Power Point #1 for Heat versus gas turbine power function
Pgt2 Power Point #2 for Heat versus gas turbine power function
Qgt2 Heat at Power Point #2 for Heat versus gas turbine power function
Pgt3 Power Point #3 for Heat versus gas turbine power function
Qgt3 Heat at Power Point #3 for Heat versus gas turbine power function
Pgt4 Power Point #4 for Heat versus gas turbine power function
Qgt4 Heat at Power Point #4 for Heat versus gas turbine power function
Pgt5 Power Point #5 for Heat versus gas turbine power function
Qgt5 Heat at Power Point #5 for Heat versus gas turbine power function
Pgt6 Power Point #6 for Heat versus gas turbine power function
Qgt6 Heat at Power Point #6 for Heat versus gas turbine power function
Pgt7 Power Point #7 for Heat versus gas turbine power function
Qgt7 Heat at Power Point #7 for Heat versus gas turbine power function
Tdrum Drum time constant
Km Pressure loss due to flow friction in the boiler tubes
Tv Actuator time constant for main steam
Kp Governor proportional gain
Ki Governor integral gain
Tn Turbine lead time constant
Td Turbine lag time constant
Qs Amount of supplemental firing, in per unit, applied to the boiler; it is to be defined by the user or by the program upon initialization of the model.
Bv Fixed position of the bypass valve defined by the user to simulate a fixed amount of steam extraction.
Pref Minimum steam pressure reference
Trate Turbine rating for the Steam Turbine in MW