Governor Model: TGOV5
AutoCorrection Properties
Following checks and corrections are applied during Validation and AutoCorrection.
- If 0.0 < T3 < Mult*TimeStep then T3 = Mult*TimeStep
- If 0.0 < Cb < Mult*TimeStep then Cb = Mult*TimeStep
- If 0.0 < Psp < Mult*TimeStep then Psp = Mult*TimeStep
- If Uo < Uc then swap the values. If Uo < 0 then Uo change sign to positive. If Uc > 0 then change sign to negative.
- If Vmax < Vmin then swap the values.
- If Rmax < Rmin then swap the values.
- If Lmax < Lmin then swap the values.
- If Cmax < Cmin then swap the values.
- If DeltaPe < 0 then change the sign to positive.
- K1 to K8: Check K1+K3+K5+K7 and K2+K4+K6+K8 <= 1.0 and if not normalized values to 1.0.
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 = Valve or if Valve < Vmin , then Vmin = Valve
- If Load Reference > Lmax , then Lmax = Load Reference or if Load Reference < Lmin , then Lmin = Load Reference
Model Equations and/or Block Diagrams
Parameters:
| K | Governor gain (recirpocal of droop), pu |
| T1 | Governor mechanism time constant, sec |
| T2 | Turbine power time constant, sec |
| T3 | Turbine exhaust temperature time constant, sec |
| Uo | Maximum valve opening velocity, pu/sec |
| Uc | Maximum valve closing velocity, pu/sec |
| Vmax | Maximum turbine power, pu of mwcap |
| Vmin | Minimum turbine power, pu of mwcap |
| T4 | Governor lead time constant, sec |
| K1 | Fraction of hp shaft power after first boiler pass |
| K2 | Fraction of lp shaft power after first boiler pass |
| T5 | Governor lag time constant, sec |
| K3 | Fraction of hp shaft power after second boiler pass |
| K4 | Fraction of lp shaft power after second boiler pass |
| T6 | Time constant, sec |
| K5 | Fraction of hp shaft power after third boiler pass |
| K6 | Fraction of lp shaft power after third boiler pass |
| T7 | Time constant, sec |
| K7 | Fraction of hp shaft power after fourth boiler pass |
| K8 | Fraction of lp shaft power after fourth boiler pass |
| K9 | Gain |
| K10 | Gain |
| K11 | Gain |
| K12 | Gain |
| K13 | Gain |
| K14 | Gain |
| Rmax | Maximum fuel valve opening rate, pu/sec |
| Rmin | Minimum fuel valve opening rate, pu/sec |
| Lmax | Po Maxmum |
| Lmin | Po Minimum |
| C1 | Inputs |
| C2 | Inputs |
| C3 | Inputs |
| B | Turbine power time constant denominator scale factor |
| Cb | Integrator time constant, sec |
| Ki | Integral gain, pu |
| Ti | Time constant, sec |
| Tr | Washout time constant, sec |
| Tr1 | Washout time constant, sec |
| Cmax | Controller maximum |
| Cmin | Controller minimum |
| Td | Input filter time constant, sec |
| Tf | Washout time constant, sec |
| Tw | Water inertia time constant, sec |
| Psp | Pressure setpoint |
| Tmw | Pelec time constant, sec |
| Kl | Controller gain |
| Kmw | Pelec gain |
| DeltaPe | Deadband |