Stabilizer Model: PSS7C

 

Following checks and corrections are applied during Validation and AutoCorrection.

  • If Tw1 <= 0 then Tw1 = Mult*TimeStep
  • If Tw2 <= 0 then Tw2 = Mult*TimeStep
  • If Tw3 <= 0 then Tw3 = Mult*TimeStep
  • If Tw4 <= 0 then Tw4 = Mult*TimeStep
  • If Ti1 <= 0 then Ti1 = Mult*TimeStep
  • If Ti2 <= 0 then Ti2 = Mult*TimeStep
  • If Ti3 <= 0 then Ti3 = Mult*TimeStep
  • If Ti4 <= 0 then Ti4 = Mult*TimeStep
  • If K0 <= 0 then K0 = Mult*TimeStep
  • If Ks1 <= 0 then Ks1 = Mult*TimeStep
  • If Ks2 <= 0 then Ks2 = Mult*TimeStep
  • If 0.0 < T9 < 0.5*Mult*TimeStep then T9 = 0, ElseIf 0.5*Mult*TimeStep < T9 < Mult*TimeStep then T9 = Mult*TimeStep
  • If Vstmax < Vstmin then swap the values. If Vstmax < 0 then Vstmax change sign to positive. If Vstmin > 0 then change sign to negative.
  • If Vsi1max < Vsi1min then swap the values.
  • If Vsi2max < Vsi2min then swap the values.

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:

Ics1 First stabilizer input code; 1=Rotor speed deviation (pu); 2=Bus Freq Deviation (pu); 3=Gen Pelec on Machine Base (pu); 4=Gen accelerating power (pu); 5=Bus voltage (pu); 6=Derivative of Bus voltage (pu); 7=Compensated Frequency Signal (pu)
Ics2 Second stabilizer input code; 1=Rotor speed deviation (pu); 2=Bus Freq Deviation (pu); 3=Gen Pelec on Machine Base (pu); 4=Gen accelerating power (pu); 5=Bus voltage (pu); 6=Derivative of Bus voltage (pu)
M PSS ramp tracking filter denominator exponent
N PSS ramp tracking filter overal exponent
Ks1 PSS main gain
Ks2 PSS gain
Ks3 PSS gain
T6 PSS transducer time constant for input channel 1
T7 PSS transducer time constant for input channel 2
Tw1 First washout on first remote bus, sec
Tw2 Second washout on first remote bus, sec
Tw3 First washout on second remote bus, sec
Tw4 Second washout on second remote bus, sec
T8 PSS ramp tracking filter numerator time constant
T9 PSS ramp tracking filter denominator time constant
K0 PSS canoniocal gain 0
K1 PSS canoniocal gain 1
K2 PSS canoniocal gain 2
K3 PSS canoniocal gain 3
K4 PSS canoniocal gain 4
Ki3 PSS third block gain
Ki4 PSS fourth block gain
Ti1 PSS time constant in first block
Ti2 PSS time constant in second block
Ti3 PSS time constant in third block
Ti4 PSS time constant in fourth block
Vsi1max Input Signal 1 maximum limit
Vsi1min Input Signal 1 minimum limit
Vsi2max Input Signal 2 maximum limit
Vsi2min Input Signal 2 minimum limit
VSTmax Maximum PSS output
VSTmin Minimum PSS output
PSSActivation Generator MW threshold for PSS activation
PSSDeactivation Generator MW threshold for PSS da-activation
Tpgfilt Filter time constant for Pgen used in PSS output logic
Xcomp Reactance for compensated frequency calculation
Tcomp Time constant for compensated frequency calculation