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Description
The EXPIC1 is used to model excitation systems where the voltage regulator includes a proportional integral (PI) control element. The EXPIC1 component was developed in line with the references [1] [2].
Mask and Parameters
AVR parameters
Expanding the "EXPIC1 diagram" displays the block diagram in the parameters window.
Name | Description | Unit | Parameter range |
Tr | Regulator input filter time constant. This input filter is not part of the IEEE committee report and there are no typical values recommended in [1]. It was added for flexibility. N.B. This parameter can be set to “0” if the filter is not used. | s | -- |
Ka | PI controller gain | -- | -- |
| Ta1 | PI controller time constant | s | -- |
| VR1 | PI controller maximum limit | pu | -- |
| VR2 | PI controller minimum limit | pu | -- |
| Ta2 | Voltage regulator time constant | s | -- |
| Ta3 | Voltage regulator time constant | s | -- |
| Ta4 | Voltage regulator time constant | s | -- |
| VRmax | Maximum voltage regulator output | pu | -- |
| VRmin | Minimum voltage regulator output | pu | -- |
| Kf | Rate feedback gain | -- | -- |
| Tf1 | Rate feedback time constant | s | Tf1 > 0.04, otherwise Tf1 = 0.04 |
| Tf2 | Rate feedback time constant | s | -- |
Exciter Parameters
Expanding the "Exciter diagram" displays the block diagram in the parameters window.
Name | Description | Unit | Parameter Range |
Ke | Exciter constant related to self-excited field | -- | -- |
Te | Exciter time constant | s | -- |
Kp | Potential circuit real part gain coefficient | -- | -- |
Ki | Potential circuit imaginary part gain coefficient | -- | -- |
Kc | Rectifier loading factor proportional to commutating reactance | -- | -- |
Se2, Se1 | Exciter saturation factor at the corresponding Vex | pu | Se1 >= Se2 |
| Ve2, Ve1 | Exciter voltage for the exciter saturation function | pu | Ve1>0, Ve1 > Ve2 |
Initial value tab
Name | Description | Unit | Variable = {Possible Values} |
Ifd0 | Synchronous machine field current initial value | pu | -- |
Efd0 | Exciter output voltage initial value | pu | -- |
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| Mathblock | ||
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\begin{equation}
V_{t}=\sqrt{{V_{d^2}+}{V_{q^2}}} \\
\end{equation} |
References
1. S. Paszek, A. Boboń, S. Berhausen, Ł. Majka, A. Nocoń, and P. Pruski, “Simulation Models of Generating Unit Elements,” in Synchronous generators and excitation systems operating in a power system: measurement methods and modeling, Cham, Switzerland: Springer, 2020, pp. 36–37.
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