Exciter Model: AC1C

Following checks and corrections are applied during Validation and AutoCorrection.

• If 0 < Te < Mult*TimeStep then Te = Mult*TimeStep
• If 0 < Tf < Mult*TimeStep then Tf = 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 < Tb < 0.5*Mult*TimeStep then Tb = 0, ElseIf 0.5*Mult*TimeStep < Tb < Mult*TimeStep then Tb = 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 Ka = 0 then Ka = Mult*TimeStep
• If EFEmax < EFEmin then swap the values
• If Vamax < Vamin 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 Va > Vamax, then Vamax = Va limits or if Va< Vamin, then Vamin = Va
• If EFE > EFEmax, then EFEmax = EFE limits or if EFE limits < EFEmin, then EFEmin = EFE limits