Separately-Excited Exciter
Electro-machine or thyristor excitation with independent power supply.
blockType: SubSystem
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Path in the library: |
Description
Unit Separately-Excited Exciter is an electromachine excitation or thyristor excitation with independent power supply. The unit Separately-Excited Exciter can be used as an exciter in a synchronous generator model with the control system shown in the diagram.
The Self-Excited Exciter mathematical model is shown in the diagram.
In this diagram
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- is the equivalent time constant of the exciter;
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- output voltage of the automatic excitation regulator;
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- excitation voltage.
Ports
Input
#
Vr
—
input voltage value from the excitation regulator
scalar
Details
The input voltage value from the excitation regulator in relative units.
| Data types |
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| Complex numbers support |
I don’t |
Output
#
Efd
—
the output value of the excitation voltage
scalar
Details
The output value of the excitation voltage applied to the excitation circuit of the synchronous machine, in relative units.
| Data types |
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| Complex numbers support |
I don’t |
Parameters
Main
# Exciter field time constant T_e, s — the time constant of the pathogen
Details
The time constant of the pathogen, in seconds.
Typically, the value of the exciter time constant for an electric machine excitation system is 0.3–0.5 s, for a thyristor it is 0.02—0.04 s.
| Default value |
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| Program usage name |
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| Evaluatable |
Yes |
# Limits exciter voltage output [Efd_max Efd_min], pu — limits of the output value of the excitation voltage
Details
The maximum and minimum output values of the excitation voltage applied to the excitation circuit of a synchronous machine, in relative units.
When modeling an electric machine excitation system, it is necessary to set the minimum output value to 0, since it does not allow a change in the sign of the excitation voltage.
| Default value |
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| Program usage name |
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| Evaluatable |
Yes |
Initial Values
# Initial field voltage Efd0, pu — the initial value of the excitation voltage
Details
The desired value of the excitation voltage output is Efd at the initial moment of simulation in relative units.
| Default value |
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| Program usage name |
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| Evaluatable |
Yes |