Exciter Model: IEET1A
Following checks and corrections are applied during Validation and AutoCorrection.
- If 0.0 < Tr < 0.5*Mult*TimeStep then Tr = 0, ElseIf 0.5*Mult*TimeStep < Tr < Mult*TimeStep then Tr = 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 < Te < Mult*TimeStep then Te = Mult*TimeStep
- If 0 < Tf < Mult*TimeStep then Tf = Mult*TimeStep
- If Vrmax < Vrmin then swap the values
- If Efdmax < Efdmin 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 or if Vr < Vrmin, then Vrmin = Vr
Model Equations and/or Block Diagrams
Parameters:
| Ka | Voltage regulator gain |
| Ta | Voltage regulator time constant, sec |
| Vrmax | Maximum control element output, pu |
| Vrmin | Minimum control element output, pu |
| Ke | Exciter field resistance line slope margin, pu |
| Te | Exciter field time constant, sec |
| Kf | Rate feedback gain, pu |
| Tf | Rate feedback constant, sec |
| Efdmin | Minimum excitation output, pu |
| E1 | Field voltage value, 1 |
| SE1 | Saturation factor at E1 |
| Efdmax | Maximum excitation output, pu |
| SE2 | Saturation factor at E2 |