Exciter Model: AC10C
AutoCorrection Properties
Following checks and corrections are applied during Validation and AutoCorrection.
- If 0 < Te < Mult*TimeStep then Te = Mult*TimeStep
- If Kr <= 0 then Kr = Mult*TimeStep
- If 0.0 < Tr < 0.25*Mult*TimeStep then Tr = 0.0
ElseIf 0.25*Mult*TimeStep < Tr < 0.5*Mult*TimeStep then Tr = 0.5*Mult*TimeStep - If Vrmax < Vrmin then swap the values
- If Vrsmax < Vrsmin 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 Vr > Vrmax, then Vrmax = Vr limits or if Vr < Vrmin, then Vrmin = Vr
- If Vrs > Vrsmax, then Vrsmax = Vrs limits or if Vrs < Vrsmin, then Vrsmin = Vrs
Model Equations and/or Block Diagrams
Parameters:
| OEL | OEL input: if < 2, add to error signal; if = 2, LV gate 1; if = 3, LV gate 2 |
| UEL | UEL input: if < 2, add to error signal; if = 2, HV gate 1; if = 3, HV gate 2 |
| VOS | PSS input: if = 1, add to error signal; if = 2, add in SWLim Logic; if = 3, add to VS2 Sum |
| SCL | SCL input: if < 2, add to error signal; if = 2, LV gate 1; if = 3, LV gate 2 |
| Tr | Filter time constant, sec |
| Kr | Field voltage feedback gain, pu |
| TB1 | Voltage Regulator Time constant 1, sec |
| TC1 | Voltage Regulator Time constant 1, sec |
| TB2 | Voltage Regulator Lag time constant 2, sec |
| TC2 | Voltage Regulator Lead time constant 2, sec |
| TUB1 | UEL Regulator Lag time constant 1, sec |
| TUC1 | UEL Regulator Lead time constant 1, sec |
| TUB2 | UEL Regulator Lag time constant 2, sec |
| TUC2 | UEL Regulator Lead time constant 2, sec |
| TOB1 | OEL Regulator Lag time constant 1, sec |
| TOC1 | OEL Regulator Lead time constan 1t, sec |
| TOB2 | OEL Regulator Lag time constant 2, sec |
| TOC2 | OEL Regulator Lead time constant 2, sec |
| VRmax | Maximum exciter control signal, pu |
| VRmin | Minimum exciter control signal, pu |
| VRSmax | Maximum exciter control signal, pu |
| VRSmin | Minimum exciter control signal, pu |
| TE | Exciter field time constant, sec |
| KC | Rectifier loading factor proportional to commutating reactance |
| Kd | Exciter internal reactance, pu |
| Ke | Exciter field resistance constant, pu |
| Vfemax | Exciter field current limit parameter, pu |
| E1 | Field voltage value, 1 |
| SE1 | Saturation factor at E1 |
| E2 | Field voltage value, 2 |
| SE2 | Saturation factor at E2 |
| SW1 | Logical switch 1 (1 = Position A, 2 = Position B) |
| Kp | Potential source gain, pu |
| ThetaP | Potencial circuit phase angle, degrees |
| KI | Potential circuit (current) gain coefficient |
| XL | Reactance associated with potential source |
| KC1 | Rectifier loading factor proportional to commutating reactance |
| VbMax1 | Maximum available exciter field voltage |
| KI2 | Potential circuit (current) gain coefficient |
| KC2 | Rectifier loading factor proportional to commutating reactance |
| VbMax2 | Maximum available exciter field voltage |
| SWEXC | Logical switch 1 (1 = Position A, 2 = Position B) |
| TEXC | Exciter field time constant, sec |
| KEXC | Exciter field resistance constant, pu |
| KCR | Rectifier loading factor proportional to commutating reactance |
| Tf1 | Rate feedback constant, sec |
| Tf2 | Feedback lead time constant, sec |
| KVFE | Fast raise/lower contact setting |
| KLIM | Exciter field current limiter gain, pu |
| Vfelim | Model Parameters\Vfelim |
| Vemin | Minimimum exciter output voltage, pu |
| Spdmlt | If not zero, multiply output (Efd) by generator speed |