Brushless Exciter
Excitation system without compounding.
blockType: SubSystem
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Path in the library: |
Description
The Brushless Exciter unit is an electro-machine brushless and high frequency modernised exciter. The modernisation of the high frequency exciter consists in the elimination of the sub exciter and the elimination of the series exciter excitation winding from the excitation system [1]. The excitation current feedback is also taken into account.
The Brushless Exciter unit can be used as an exciter in a synchronous generator model with a control system, which is shown in the schematic.
The Brushless Exciter mathematical model is shown in the diagram.
In this diagram
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- is the equivalent lag time constant of the exciter;
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- equivalent exciter advance time constant;
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- design parameter;
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- output voltage of the automatic excitation regulator;
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- excitation voltage;
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- rotor excitation current;
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- rotor speed of the generator rotor in relative units.
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 |
#
ω
—
the input value of the generator rotor speed
scalar
Details
The input value of the rotor speed of the generator in relative units.
| Data types |
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| Complex numbers support |
I don’t |
#
Ifd
—
input value of the excitation current of the generator
scalar
Details
The input value of the excitation current of the generator.
| 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 |
|
| Complex numbers support |
I don’t |
Parameters
Main
# Field current coefficient K — calculated coefficient of the excitation current
Details
The calculated coefficient of the excitation current.
The calculation method is presented in [1] p.107.
| Default value |
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| Program usage name |
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| Evaluatable |
Yes |
# Transient gain reduction lead and lag time constants [T1 T2], s — calculated equivalent pathogen time constants
Details
Calculated equivalent time constants of the pathogen, in seconds.
The calculation method is presented in [1] p.107.
| Default value |
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| Program usage name |
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| Evaluatable |
Yes |
# Maximum exciter voltage output Efdmax, pu — maximum output value of the excitation voltage
Details
The maximum output value of the excitation voltage applied to the excitation circuit of a synchronous machine, in relative units.
| Default value |
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| Program usage name |
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| Evaluatable |
Yes |
Initial Values
# Initial condition of 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 |
Limits regulator
# Voltage regulator input limits [VRmax VRmin], pu — limits of the input voltage of the regulator
Details
The maximum and minimum input voltage of the regulator.
| Default value |
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| Program usage name |
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| Evaluatable |
Yes |