Machine Model: CBEST

 

Following checks and corrections are applied during Validation and AutoCorrection.

  • If 0 < T3 < Mult*TimeStep then T3 = Mult*TimeStep
  • T1, T3 and T4:
    • If T1 = T3 for model, T1 and T3 will be ignored (T1=0 and T3=small value).
    • Ff T1 = T4 for model, T1 and T4 will be ignored (T1=0 and T4=0).
  • T2, T3 and T4
    • T2 = T4 for model, T2 and T4 will be ignored (T2=0 and T4=0).
    • T2 = T3 for model, T2 and T3 will be ignored (T2=0 and T3=small value).

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:

Pmax Maximum power, pu
OutEff Output efficiency ( ≥ 1 )
InEff Input efficiency ( ≤1 )
Iacmaxpu IACMAX (pu)
Kavr AVR gain
T1 AVR time constant, sec
T2 AVR time constant, sec
T3 AVR time constant, sec ( >0 )
T4 AVR time constant, sec
Vmax Maximum AVR speed limit, pu
Vmin Minimum AVR speed limit, pu ( <0 )
Droop DROOP, pu