Exciter Model: WT4E

Following checks and corrections are applied during Validation and AutoCorrection.

• If 0.0 < Tr < 0.25*Mult*TimeStep then Tr = 0.0
  ElseIf 0.25*Mult*TimeStep < Tr < 0.5Mult*TimeStep then Tr = 0.5*Mult*TimeStep
• If 0.0 < Tv < 0.5*Mult*TimeStep then Tv = 0, ElseIf 0.5*Mult*TimeStep < Tv < Mult*TimeStep then Tv = Mult*TimeStep
• If 0.0 < Tp < 0.5*Mult*TimeStep then Tp = 0, ElseIf 0.5*Mult*TimeStep < Tp < Mult*TimeStep then Tp = Mult*TimeStep
• If 0.0 < Tpwr < 0.5*Mult*TimeStep then Tpwr = 0, ElseIf 0.5*Mult*TimeStep < Tpwr < Mult*TimeStep then Tpwr = Mult*TimeStep
• If Vmax < Vmin then swap the values
• If Qmax < Qmin 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 QCmd > Qmax , then Qmax = QCmd or if QCmd < Qmin , then Qmin = QCmd
• If VRef > Vmax , then Vmax = VRef or if VRef < Vmin, then Vmin = VRef