Exciter Model: EXPIC1

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 < Tf1 < Mult*TimeStep then Tf1 = Mult*TimeStep
• If 0.0 < Tf2 < 0.5*Mult*TimeStep then Tf2 = 0, ElseIf 0.5*Mult*TimeStep < Tf2 < Mult*TimeStep then Tf2 = Mult*TimeStep
• If 0.0 < Ta2 < 0.5*Mult*TimeStep then Ta2 = 0, ElseIf 0.5*Mult*TimeStep < Ta2 < Mult*TimeStep then Ta2 = Mult*TimeStep
• If 0.0 < Ta4 < 0.5*Mult*TimeStep then Ta4 = 0, ElseIf 0.5*Mult*TimeStep < Ta4 < Mult*TimeStep then Ta4 = Mult*TimeStep
• If Vrmax < Vrmin then swap the values
• If Vr1 < Vr2 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 Efd > Efdmax, then Efdmax = Efd limits or if Efd < Efdmin, then Efdmin = Efd
• If Vr > Vrmax , then Vrmax = Vr limits or if Vr limits < Vrmin, then Vrmin = Vr limits
• If Va > Vr1, then Vr1 = Va or if Va < Vr2, then Vr2 = Va