Machine Model: WT1G

 

Following checks and corrections are applied during Validation and AutoCorrection.

  • If 0.0 < Tpo < 0.5*Mult*TimeStep then Tpo = 0, ElseIf 0.5*Mult*TimeStep < Tpo < Mult*TimeStep then Tpo = Mult*TimeStep
  • If 0.0 < Tppo < 0.5*Mult*TimeStep then Tppo = 0, ElseIf 0.5*Mult*TimeStep < Tppo < Mult*TimeStep then Tppo = Mult*TimeStep
  • If Lp > 0.4*Ls is not possible then Lp = 0.4*Ls.
  • If Lpp > Lp is not possible then Lpp = Lp.
  • If Ll > 0.8*Lpp is not possible then Ll = 0.8*Lpp.

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:

Ls Synchrounous reactance, (pu > 0)
Lp Transient reactance (pu, > 0)
Ra Stator resistance, pu
Tpo Transient rotor time constant, sec
SE1 Saturation factor at E1
SE2 Saturation factor at E2
Acc Acceleration factor for initialization
Lpp Sub-transient reactance (pu, > 0)
Ll Stator leakage reactance (pu, > 0)
Tppo Sub-transient rotor time constant, sec
ndelt Time step subdivision factor.
wdelt Speed threshold for subdividing time step, pu