Self-Excited Exciter
Thyristor self-excitation without series transformer.
Description
Unit Self-Excited Exciter is a thyristor self-excitation (fed from the busbars of the excited generator) without a series transformer. The unit Self-Excited Exciter can be used as an exciter in a synchronous generator model with the control system shown in the diagram.
The mathematical model Self-Excited Exciter is presented in the diagram.
In the diagram below
-
- is the equivalent time constant of the exciter;
-
- output voltage of the automatic excitation regulator;
-
- excitation voltage;
-
- current voltage at the generator stator terminals in relative units.
Ports
Input
#
Vr
—
input voltage value from the excitation regulator
scalar
Details
Input voltage value from the excitation regulator in relative units.
| Data types |
|
| Complex numbers support |
No |
#
Vd
—
generator voltage input value
scalar
Details
The input value of the oscillator voltage along the d-axis in dq0-coordinates in relative units.
| Data types |
|
| Complex numbers support |
No |
#
Vq
—
generator voltage input value
scalar
Details
The input value of the oscillator voltage along the q-axis in dq0-coordinates in relative units.
| Data types |
|
| Complex numbers support |
No |
Output
#
Efd
—
excitation voltage output
scalar
Details
The output value of the excitation voltage applied to the excitation circuit of a synchronous machine, in relative units.
| Data types |
|
| Complex numbers support |
No |
Parameters
Main
# Exciter field time constant T_e, s — exciter time constant
Details
Exciter time constant, in seconds.
Usually the exciter time constant value for the electric machine excitation system is 0.3-0.5 s, for thyristor excitation system - 0.02-0.04 s.
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |
# Limits exciter voltage output [Efd_max Efd_min], pu — excitation voltage output value limits
Details
The maximum and minimum output value of the excitation voltage applied to the field circuit of a synchronous machine, in relative units.
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |
Initial Values
# Initial field voltage Efd0, pu — initial value of excitation voltage
Details
Initial value of the excitation voltage in relative units.
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |
Machine Parameters
# Rated voltage, V — generator rated voltage
Details
Rated alternator voltage, in volts.
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |
Machine Initial Values
# Initial condition of terminal voltage magnitude, V — generator’s initial voltage
Details
Initial generator voltage, in volts.
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |