Governor Model: HYGOV4
AutoCorrection Properties
Following checks and corrections are applied during Validation and AutoCorrection.
- If 0.0 < Tr < Mult*TimeStep then Tr = Mult*TimeStep
- If 0.0 < Tg < Mult*TimeStep then Tg = 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 Gate > Pmax , then Pmax = Gate or if Gate < Pmin , then Pmin = Gate
Model Equations and/or Block Diagrams
Parameters:
| Trate | Turbine rating, MW |
| Tg | Gate servo time constant, sec |
| Tp | Lead time constant, sec |
| Uo | Maximum valve opening velocity, pu/sec |
| Uc | Maximum valve closing velocity, pu/sec |
| Pmax | Maximum gate opening, pu of mwcap |
| Pmin | Minimum gate opening, pu of mwcap |
| Rperm | Permanent droop, pu |
| Rtemp | Temporary droop, pu |
| Tr | Washout time constant, sec |
| Tw | Water inertia time constant, sec |
| At | Turbine gain, pu |
| Dturb | Turbine damping coefficient, pu |
| Hdam | Head available at dam, pu |
| Qnl | No-load flow at nominal head, pu |
| db1 | Intentional deadband width, Hz |
| Eps | Intentional db hysteresis, Hz |
| db2 | Unintentional deadband, MW |
| Gv0 | Nonlinear gain point 0, pu gv |
| Pgv0 | Nonlinear gain point 0, pu power |
| 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 |
| Hdam1 | Head available at dam, pu. If > 0 this overrides the first one in the list. |
| Bgv0 | Kaplan blade servo point 0, pu |
| Bgv1 | Kaplan blade servo point 1, pu |
| Bgv2 | Kaplan blade servo point 2, pu |
| Bgv3 | Kaplan blade servo point 3, pu |
| Bgv4 | Kaplan blade servo point 4, pu |
| Bgv5 | Kaplan blade servo point 5, pu |
| Bmax | Maximum blade adjustment factor |
| Tblade | Blade servo time constant, sec |