Governor Model: GAST2A

Following checks and corrections are applied during Validation and AutoCorrection.

• If 0.0 < Y < Mult*TimeStep then Y = Mult*TimeStep
• If 0.0 < A < Mult*TimeStep then A = Mult*TimeStep
• If 0.0 < B < Mult*TimeStep then B = Mult*TimeStep
• If 0.0 < TauF < Mult*TimeStep then TauF = Mult*TimeStep
• If 0.0 < T3 < Mult*TimeStep then T3 = Mult*TimeStep
• If 0.0 < T4 < Mult*TimeStep then T4 = Mult*TimeStep
• If 0.0 < T5 < Mult*TimeStep then T5 = Mult*TimeStep
• If 0.0 < T < 0.5*Mult*TimeStep then T = 0, ElseIf 0.5*Mult*TimeStep < T < Mult*TimeStep then T = Mult*TimeStep
• If 0 < Bf2 < Mult*TimeStep then Bf2 = Mult*TimeStep
• If 0.0 < K3 < Mult*TimeStep then K3 = Mult*TimeStep
• If 0.0 < TauT < Mult*TimeStep then TauT = Mult*TimeStep
• If 0.0 < Tcd < 0.5*Mult*TimeStep then Tcd = 0, ElseIf 0.5*Mult*TimeStep < Tcd < Mult*TimeStep then Tcd = Mult*TimeStep
• If 0.0 < Etd < 0.5*Mult*TimeStep then Etd = 0, ElseIf 0.5*Mult*TimeStep < Etd < Mult*TimeStep then Etd = Mult*TimeStep
• If MaxLimit < MinLimit 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 ((C/A + Kf)*((Pmech - AF2)/Bf2)- K6)/K3 > Max, then Max = ((C/A + Kf)*((Pmech - AF2)/Bf2)- K6)/K3 or if ((C/A + Kf)*((Pmech - AF2)/Bf2)- K6)/K3 < Min, then Min = ((C/A + Kf)*((Pmech - AF2)/Bf2)- K6)/K3