Governor Model: DEGOV1 and DEGOV1D

Following checks and corrections are applied during Validation and AutoCorrection.

• If 0.0 < T1 < 0.5*Mult*TimeStep then T1 = 0, ElseIf 0.5*Mult*TimeStep < T1 < Mult*TimeStep then T1 = Mult*TimeStep
• If 0.0 < T2 < 0.5*Mult*TimeStep then T2 = 0, ElseIf 0.5*Mult*TimeStep < T2 < Mult*TimeStep then T2 = Mult*TimeStep
• If 0.0 < T5 < 0.5*Mult*TimeStep then T5 = 0, ElseIf 0.5*Mult*TimeStep < T5 < Mult*TimeStep then T4 = Mult*TimeStep
• If 0.0 < T6 < 0.5*Mult*TimeStep then T6 = 0, ElseIf 0.5*Mult*TimeStep < T6 < Mult*TimeStep then T5 = Mult*TimeStep
• If 0.0 < Te < 0.5*Mult*TimeStep then Te = 0, ElseIf 0.5*Mult*TimeStep < Te < Mult*TimeStep then Te = Mult*TimeStep
• If Td > 12*TimeStep then Td = 12*TimeStep AND If 0.0 < Td < 0.25*Mult*TimeStep then Td = 0, ElseIf 0.25*Mult*TimeStep < Td < 0.5*Mult*TimeStep then Td = 0.5*Mult*TimeStep
• If Tmax < Tmin 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 T5 = 0, then we also assume T4 = 0
• If Pmech > Tmax, then Tmax = Pmech or if Pmech < Tmin, then Tmin = Pmech