Machine Model: CIMTR4

 

Following checks and corrections are applied during Validation and AutoCorrection.

  • 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 < Tpp < 0.5*Mult*TimeStep then Tpp = 0, ElseIf 0.5*Mult*TimeStep < Tpp < Mult*TimeStep then Tpp = Mult*TimeStep
  • Xl, Xp, Xpp and Tpp:
    • If Xpp > 0 and Tpp > 0 and Xl >= Xpp then Xl := 0.8*Xpp
    • If Xl >= Xp then Xl := 0.5*Xp

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

Model Equations and/or Block Diagrams

Parameters:

Tp T' - Transient rotor time constant
Tpp T'' – Sub-transient rotor time constant in sec.
H Inertia constant in sec.
X Synchronous reactance
Xp X' – Transient Reactance
Xpp X'' – Sub-transient Reactance
Xl Stator leakage reactance in p.u.
E1 Field voltage value E1
SE1 Saturation value at E1
E2 Field voltage value E2
D Damping
SYN-TOR Synchronous torque (p.u. < 0)

States:

1 – Epr

2 – Epi

3 – Ekr

4 – Eki

5 – Speed wr