Governor Model: IEEEG1, IEEEG1D and IEEEG1_GE

Following checks and corrections are applied during Validation and AutoCorrection.

• If 0.0 < T3 < Mult*TimeStep then T3 = Mult*TimeStep
• If 0.0 < T4 < 0.5*Mult*TimeStep then T4 = 0, ElseIf 0.5*Mult*TimeStep < T4 < Mult*TimeStep then T4 = Mult*TimeStep
• If 0.0 < T5 < 0.5*Mult*TimeStep then T5 = 0, ElseIf 0.5*Mult*TimeStep < T5 < Mult*TimeStep then T5 = Mult*TimeStep
• If 0.0 < T6 < 0.5*Mult*TimeStep then T6 = 0, ElseIf 0.5*Mult*TimeStep < T6 < Mult*TimeStep then T6 = Mult*TimeStep
• If 0.0 < T7 < 0.5*Mult*TimeStep then T7 = 0, ElseIf 0.5*Mult*TimeStep < T7 < Mult*TimeStep then T7 = Mult*TimeStep
• If Uo < Uc then swap the values. If Uo < 0 then Uo change sign to positive. If Uc > 0 then change sign to negative.
• If Pmax < Pmin then swap the values.
• K1 to K8: Check K1+K3+K5+K7 and K2+K4+K6+K8 <= 1.0 and if not normalized values to 1.0.

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 Pmech > Pmax , then Pmax = Pmech or if Pmech < Pmin , then Pmin = Pmech