Over Excitation Limiter Model: OEL4C

 

Following checks and corrections are applied during Validation and AutoCorrection.

  • Kp and Ki: Kp can't be 0 if Ki = 0, if true then Kp changed to 40.

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:

Qref Reactive power limit, per unit on machine base; the default of zero means to use the power flow Qmax
TDelay Time delay to begin enforcement, seconds
Kp PI proportional gain
Ki PI integral gain
Vmin Maximum value to change voltage reference, must be always <= 0