Self-Excited Exciter
Thyristor self-excitation without a series transformer.
blockType: SubSystem
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Path in the library: |
Description
Block Self-Excited Exciter It is a thyristor self-excitation (powered by the busbars of an excited generator) without a series transformer. Block Self-Excited Exciter It can be used as an exciter in a synchronous generator model with a control system, which is shown in the diagram.
Mathematical model Self-Excited Exciter shown in the diagram.
On the presented diagram
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— the equivalent time constant of the pathogen;
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— output voltage of the automatic excitation regulator;
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— arousal voltage;
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— the current voltage at the terminals of the generator stator in relative units;
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— the rated voltage of the generator in relative units, equal to
1.
Ports
Entrance
# Vr is the input voltage value from the excitation regulator
+
scalar
Details
The input voltage value from the excitation regulator in relative units.
| Типы данных |
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| Support for complex numbers |
None |
# Vd is the input voltage value of the generator along the d axis
+
scalar
Details
The input voltage value of the generator along the d axis in dq0 coordinates in relative units.
Dependencies
To use this port, check the box Enable d-q voltage ports.
| Типы данных |
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| Support for complex numbers |
None |
#
Vq is
the input voltage value of the generator along
the q + axis
scalar
Details
The input voltage value of the generator along the q axis in dq0 coordinates in relative units.
Dependencies
To use this port, check the box Enable d-q voltage ports.
| Типы данных |
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| Support for complex numbers |
None |
# V is the full input voltage of the generator
+
scalar
Details
The full input voltage value of the generator.
Dependencies
To use this port, uncheck the box. Enable d-q voltage ports.
| Типы данных |
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| Support for complex numbers |
None |
Output
# Efd is the output value of the excitation voltage
+
scalar
Details
The output value of the excitation voltage applied to the excitation circuit of a synchronous machine, in relative units.
| Типы данных |
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| Support for complex numbers |
None |
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 time constant of the exciter for an electric machine excitation system is 0.3–0.5 s, for a thyristor — 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 value of the excitation voltage applied to the excitation circuit of the synchronous machine, in relative units.
| Default value |
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| Program usage name |
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| Evaluatable |
Yes |
Voltage Ports
# Enable d-q voltage ports — activation of generator voltage input ports along the d and q axes
Details
If this check box is checked, the unit uses the input ports Vd and Vq If the check box is unchecked, instead of the d- and q-components, the unit uses the V port to transmit the full voltage value.
The check box is checked By default.
| 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 |
Machine Parameters
# Rated voltage, V — Rated voltage of the generator
Details
The rated voltage of the generator, in volts.
| Default value |
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| Program usage name |
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| Evaluatable |
Yes |
Machine Initial Values
# Initial condition of terminal voltage magnitude, V — the initial voltage of the generator
Details
The value of the generator voltage at the initial moment of the simulation in volts to obtain the desired initial value of the excitation voltage Efd. If, at the initial moment of simulation, the voltage port V (RMS Vd, Vq) receives a value equal to Initial condition of terminal voltage magnitude, V Rated voltage, V, then at the output at the start of the simulation, the unit will output the excitation voltage Efd set in the parameter Initial field voltage Efd0, pu.
| Default value |
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| Program usage name |
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| Evaluatable |
Yes |