Governor Model: HYGOVR
AutoCorrection Properties
Following checks and corrections are applied during Validation and AutoCorrection.
- If At <= 0 then At = Mult*TimeStep
- If 0.0 < Tt < 0.5*Mult*TimeStep then Tt = 0, ElseIf 0.5*Mult*TimeStep < Tt < Mult*TimeStep then Tt = Mult*TimeStep
- If 0.0 < Tp < 0.5*Mult*TimeStep then Tp = 0, ElseIf 0.5*Mult*TimeStep < Tp < Mult*TimeStep then Tp = Mult*TimeStep
- If 0.0 < Tw < Mult*TimeStep then Tw = Mult*TimeStep
- If Gmax < Gmin 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 > Gmax , then Gmax = GV or if GV < Gmin , then Gmin = 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 |
| R | Permanent droop, pu |
| Td | Input filter time constant, sec |
| T1 | Governor mechanism time constant, sec |
| T2 | Turbine power time constant, sec |
| T3 | Turbine exhaust temperature time constant, sec |
| T4 | Governor lead time constant, sec |
| T5 | Governor lag time constant, sec |
| T6 | T, sec |
| T7 | T, sec |
| T8 | T, sec |
| Tp | Lead time constant, sec |
| Velopen | Maximum gate opening velocity, pu/sec |
| Velclose | Maximum gate closing velocity, pu/sec |
| Ki | Integral gain, pu |
| Kg | Gate servo gain, pu |
| Gmax | Maximum gate velocity, pu of mwcap |
| Gmin | Minimum gate velocity, pu of mwcap |
| 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 |