Governor Model: ISOGOV1
AutoCorrection Properties
Following checks and corrections are applied during Validation and AutoCorrection.
- If 0.0 < T1 < Mult*TimeStep then T1 = Mult*TimeStep
- If 0.0 < T3 < 0.5*Mult*TimeStep then T3 = 0, ElseIf 0.5*Mult*TimeStep < T3 < Mult*TimeStep then T3 = Mult*TimeStep
- If Vmax < Vmin 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 Valve > Vmax , then Vmax = Valveor if Valve < Vmin , then Vmin = Valve
Model Equations and/or Block Diagrams
Parameters:
| R | Permanent droop, pu |
| Ki | Integrator gain |
| T1 | Steam bowl time constant, sec |
| Vmax | Maximum valve position limit, pu of Trate |
| Vmin | Minimum valve position limit, pu of Trate |
| T2 | Numerator time constant of T2, T3 block, sec |
| T3 | Reheater time constant, sec |
| Dt | Turbine damping coefficient, pu |
| Trate | Turbine rating, MW |