Exciter Model: EX2000

 

Following checks and corrections are applied during Validation and AutoCorrection.

  • If 0.0 < Tr < 0.25*Mult*TimeStep then Tr = 0.0

    ElseIf 0.25*Mult*TimeStep < Tr < 0.5*Mult*TimeStep then Tr = 0.5*Mult*TimeStep
  • If 0 < Te < Mult*TimeStep then Te = Mult*TimeStep
  • If Vrmax < Vrmin then swap the values
  • If Vamax < Vamin 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

Following treatment is handled during the transient numerical simulation

  • If Vr > Vrmax, then Vrmax = Vr or if Vr < Vrmin, then Vrmin = Vr
  • If Va > Vamax, then Vamax = Va or if Va < Vamin, then Vamin = Va
  • If RefLimP > Vref, then RefLimP = Vref
  • If Vfemax > Vemax, then Vfemax = Vemax

Model Equations and/or Block Diagrams

Parameters:

FCL Field Current Limit: 0=excluded, 1=included
MinGate2 Minimum gate 2: 0=excluded, 1=included
Kpr Proportional gain, pu
Kir Integral gain, pu
Vrmax Maximum exciter control signal, pu
Vrmin Minimum exciter control signal, pu
Kpa Amplifier proportional gain, pu
Kia Amplifier integral gain, pu
VaMax Maximum control element output, pu
VaMin Minimum control element output, pu
Kp Potential source gain, pu
Kl Exciter field current limiter gain, pu
Te Exciter field time constant, sec
Vfemax Exciter field current limit parameter, pu
Ke Exciter field resistance constant, pu
Kc Rectifier loading factor proportional to commutating reactance
Kd Exciter internal reactance, pu
KF1 Feedback gain KF1
KF2 Feedback gain KF2
E1 Field voltage value, 1
SE1 Saturation factor at E1
E2 Field voltage value, 2
SE2 Saturation factor at E2
Kvhz Volt/hz gain
Krcc Volt/reactive current gain
Tr Filter time constant, sec
Ifdref1 Field current first reference
Ifdref2 Field current second reference
Ifdref3 Field current third reference
Ifdref4 Field current fourth reference
I1 Inverse timing constant
T1 Inverse timing current constant, sec
I2 Inverse timing constant
T2 Inverse timing current constant, sec
I3 Inverse timing constant
T3 Inverse timing current constant, sec
I4 Inverse timing constant
T4 Inverse timing current constant, sec
Tlead Field current limiter time constant
Tlag Field current limiter time constant
Kpifd Proportional gain
Kiifd Integral gain
IfdLimP Maximum output
IfdLimN Minimum output
IfdadVlim Advance field current limit
Vemin Minimimum exciter output voltage, pu
Reflimp Voltage reference signal limit