Exciter Model: ESAC8B_GE
Following checks and corrections are applied during Validation and AutoCorrection.
- If 0 < Te < Mult*TimeStep then Te = Mult*TimeStep
- If 0.0 < Ta < 0.5*Mult*TimeStep then Ta = 0, ElseIf 0.5*Mult*TimeStep < Ta < Mult*TimeStep then Ta = Mult*TimeStep
- If 0.0 < Tdr < 0.5*Mult*TimeStep then Tdr = 0, ElseIf 0.5*Mult*TimeStep < Tdr < Mult*TimeStep then Tdr = 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 - Kpr and Kir: Kpr can't be 0 if Kir = 0, if true then Kpr changed to 40.
- If Vrmax < Vrmin then swap the values
- If Vfedmax < Vfedmin 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
Model Equations and/or Block Diagrams
Parameters:
| Tr | Filter time constant, sec |
| Kpr | Proportional gain, pu |
| Kir | Integral gain, pu |
| Kdr | Regulator derivative gain, pu |
| Tdr | Regulator derivative washout time constant, sec |
| Vrmax | Maximum exciter control signal, pu |
| Vrmin | Minimum exciter control signal, pu |
| Ka | Voltage regulator gain |
| Ta | Voltage regulator time constant, sec |
| Te | Exciter field time constant, sec |
| Vfemax | Exciter field current limit parameter, pu |
| Vemin | Minimimum exciter output voltage, pu |
| Ke | Exciter field resistance constant, pu |
| Kc | Rectifier loading factor proportional to commutating reactance |
| Kd | Exciter internal reactance, pu |
| E1 | Field voltage value, 1 |
| SE1 | Saturation factor at E1 |
| E2 | Field voltage value, 2 |
| SE2 | Saturation factor at E2 |
| VTMult | If non-zero, multiply Vrmax and Vrmin by terminal voltage |
| Spdmlt | If not zero, multiply output (Efd) by generator speed |