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Description
This model is a general-purpose rotating excitation system model that, given the proper parameters and tuning, can represent a variety of exciters. The REXSYS component was developed in line with the reference [1].
Mask and Parameters
AVR parameters
Expanding the "REXSYS AVR diagram" displays the block diagram in the parameters window.
Name | Description | Unit | Parameter range |
Tr | Regulator input filter time constant | s | - |
Kvp | Voltage regulator proportional gain | - | Kvp ≠ 0 |
Kvi | Voltage regulator integral gain | - | - |
VImax | Voltage regulator input limit | pu | - |
Ta | Voltage regulator time constant | s |
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Tc1 | First stage lead-lag numerator time constant | s | - |
Tb1 | First stage lead-lag denominator time constant | s | - |
Tc2 | Second stage lead-lag numerator time constant | s | - |
Tb2 | Second lead-lag denominator time constant | s | - |
VRmax | Maximum voltage regulator output | pu | - |
VRmin | Minimum voltage regulator output | pu | - |
Kf | Rate feedback gain | - | - |
Tf | Rate feedback time constant | s | If Tf < 0.2, then Tf = 0.2 |
Tf1 | Feedback lead-lag numerator time constant | s | - |
Tf2 | Feedback lead-lag denominator time constant | s | - |
Fbf | Rate feedback signal selector | - | [1, 2, 3] |
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FCR and Exciter Parameters
Expanding the "FCR and Exciter diagram" displays the block diagram in the parameters window.
Name | Description | Unit | Variable = {Possible Values} |
Kip | Field current regulator proportional gain | - | - |
Kii | Field current regulator integral gain | - | - |
Tp | Field current bridge time constant | s | - |
VFmax | Maximum exciter field current | pu | - |
VFmin | Minimum exciter field current | pu | - |
Kh | Field voltage controller feedback gain | - | - |
Ke | Exciter constant related to self-excited field | - | - |
Te | Exciter time constant | s |
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Kc | Rectifier loading factor proportional to commutating reactance | - | - |
Kd | Exciter demagnetizing factor | - | - |
Se2, Se1 | Exciter saturation factor at the corresponding Vex | pu | - |
Ve2,Ve1 | Exciter voltage for the exciter saturation function | pu | Ve1 > Ve2 > 0 |
F1imf | Power supply limit factor | - | - |
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The HYPERSIM simulation option Set Initial Conditions must be checked for the calculation to work properly.
References
1. PSS®E 34.2.0 Model Library. NY, USA: Siemens Industry, Inc., 2017.