Governor Model: GGOV1 and GGOV1D

Following checks and corrections are applied during Validation and AutoCorrection.

• If 0.0 < Kturb< Mult*TimeStep then Kturb= Mult*TimeStep
• If 0.0 < TPelec < 0.5*Mult*TimeStep then TPelec = 0, ElseIf 0.5*Mult*TimeStep < TPelec < Mult*TimeStep then TPelec = 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 < Ta < 0.5*Mult*TimeStep then Ta = 0, ElseIf 0.5*Mult*TimeStep < Ta < Mult*TimeStep then Ta = Mult*TimeStep
• If 0.0 < Tsb < 0.5*Mult*TimeStep then Tsb = 0, ElseIf 0.5*Mult*TimeStep < Tsb < Mult*TimeStep then Tsb = Mult*TimeStep
• If 0.0 < Tfload < 0.5*Mult*TimeStep then Tfload = 0, ElseIf 0.5*Mult*TimeStep < Tfload < Mult*TimeStep then Tfload = Mult*TimeStep
• If Maxerr < Minerr then swap the values. If Maxerr < 0 then Maxerr change sign to positive. If Minerr > 0 then change sign to negative.
• If Vmax < Vmin then swap the values. If Vmax > 1 then Vmax = 1. If Vmin < 0 then Vmin = 0.
• If ROpen > 0.1 then ROpen = 0.1
• If RClose > -0.1 then RClose = -0.1
• If Rup > 99 then Rup = 99
• If Rdown > -99 then Rdown = -99
• If Kpgov/Kigov < Mult*TimeStep then Kpgov = 0

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 Low Value Select > Vmax, then Vmax = Low Value Select or if Low Value Select < Vmin, then Vmin = Low Value Select
• If Err > Maxerr, then Maxerr = Err or if Err < Minerr, then Minerr = Err