Exciter Model: TEXS
AutoCorrection Properties
Following checks and corrections are applied during Validation and AutoCorrection.
- If 0 < Tvd < Mult*TimeStep then Tvd = Mult*TimeStep
- If 0 < Tg < Mult*TimeStep then Tg = Mult*TimeStep
- If Vrmax < Vrmin 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 Ilr > (Vr/Klr + Ifd)/Kcl, then Ilr = (Vr/Klr + Ifd)/Kcl
(local_Vr/fKlr + local_Ifd)/fKcl,fIlr,'Ilr'
Model Equations and/or Block Diagrams
Parameters:
| Tr | Transducer time constant, sec |
| Kvp | Voltage regulator proportional gain |
| Kvi | Voltage regulator integral gain |
| Kvd | Voltage regulator derivative gain |
| Tvd | Voltage regulator derivative time constant, sec |
| ViMax | Voltage regulator input limit, pu |
| Kff | Feedforward gain |
| Km | DC converter gain |
| Vrmax | Maximum control element output, pu |
| Vrmin | Minimum control element output, pu |
| Kg | Field current regulator feedback gain |
| Tg | Field current feedback time constant, sec |
| Kcl | Field current limit setpoint gain |
| Klr | Gain on field current limit |
| Ilr | Maximum field current, pu |
| Xc | Exciter compounding reactance, pu |
| Flag | Excitation power source flag |