Governor Model: HYG3

 

Following checks and corrections are applied during Validation and AutoCorrection.

  • If At <= 0 then At = Mult*TimeStep
  • If 0.0 < Tw < Mult*TimeStep then Tw = Mult*TimeStep
  • If Pmax < Pmin then swap the values.

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

Following treatment is handled during the transient numerical simulation

  • If GV > Pmax , then Pmax = GV or if GV < Pmin , then Pmin = GV

Model Equations and/or Block Diagrams  

Parameters:

Trate Turbine rating, MW
Pmax Maximum gate opening, pu of mwcap
Pmin Minimum gate opening, pu of mwcap
Cflag Governor control flag, 1=PID, -1=Double Derivative
Rgate Steady-state droop, pu for governor output feedback
Relec Steady-state droop, pu, for electric power feedback
Td Input filter time constant, sec
Tf Filter time constant, sec
Tp Lead time constant, sec
Velopen Maximum gate opening velocity, pu/sec
Velclose Maximum gate closing velocity, pu/sec
K1 Double derivative gain, pu
K2 Double derivative gain, pu, if Cflag = -1
Ki Integral gain, pu
Kg Gate servo gain, pu
Tt Power feedback time constant, sec
db1 Intentional deadband width, Hz
Eps Intentional db hysteresis, Hz
db2 Unintentional deadband, MW
Tw Water inertia time constant, sec
At Turbine gain, pu
Dturb Turbine damping coefficient, pu
Qnl No-load flow at nominal head, pu
H0 Turbine nominal head, pu
Gv1 Nonlinear gain point 1, pu gv
Pgv1 Nonlinear gain point 1, pu power
Gv2 Nonlinear gain point 2, pu gv
Pgv2 Nonlinear gain point 2, pu power
Gv3 Nonlinear gain point 3, pu gv
Pgv3 Nonlinear gain point 3, pu power
Gv4 Nonlinear gain point 4, pu gv
Pgv4 Nonlinear gain point 4, pu power
Gv5 Nonlinear gain point 5, pu gv
Pgv5 Nonlinear gain point 5, pu power
Gv6 Nonlinear gain point 6, pu gv
Pgv6 Nonlinear gain point 6, pu power